Kathryn Kane's excellent article about the eruption of Mount Tambora HERE also mentions an eruption of 1809 which made the mini ice age worse, but as you will see from the data below, even before that the weather was at times pretty extreme at times!
1800
An overall dry summer from March - September
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Jan
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Mild at beginning of month, then severe frost and heavy
rains with thunder to end of month.
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Feb
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Mostly dry.
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Mar
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Dry winds throughout month. W and SW winds prevailing.
Beef up from 6d/lb to 8d; veal from 7d/lb to 8d; Mutton
from 5d/lb to 6d
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Apr
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Mild, some gentle seasonal rain, but heavy rain at end of
month. W and SW winds prevailing
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May
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Sunday 4th May violent thunder storms at Windsor, Liverpool, Hull,
Northampton, Kettering, Warwick, Lincolnshire etc.
Floods after the storm as far S. as London.
May not as warm as sometimes but generally dry after the
storm.
W and SW winds prevailing.
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Jun
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Rain off and on for first ten days of month
Wednesday 4th, rain all morning in London and pouring from 9am -1pm on the Review in Hyde Park; but George III rode throughout it.
Dry and fine after the 10th.
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Jul
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Dry; hot and windy.
Harvest able to commence by the close of the month. Drought.
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Aug
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First half of month hot and sultry
Tuesday 19th, uncommonly hot but with clouds
coming in from NW followed by storm of hail, greatest in Norfolk and across to Baldock. There was a powerful storm in London, and damage to
buildings from lightning. Storms were
experienced from Dorset to East
Anglia, some flash floods. 4 men died at Lyme. The harvest in East Anglia was saved, but not
all of it further south.
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Sept
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A dry beginning to the month, then showery.
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Oct
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Mild
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Nov
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The first weeks of the month very adverse.
Saturday 8th heavy rains Exeter
and Bath; a chaise was washed away near Exeter.
Sunday 9th November dreadful storm of wind in
the morning, Stevenage. The Chartist meeting on Kennington Common
was dispersed as much by heavy rain as by the horse volunteers…
Largely temperate for most of rest of month
Frost at the end of November.
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Dec
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Mild for most of month.
Snow fell Saturday 29th which slowed down the
Mails. 6’ deep in some places.
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1801
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Jan
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Mild, very little frost, wet
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Feb
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Mild but damp, a few frosty nights.
Tuesday 17th inclement weather
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Mar
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Strong winds, and frequent rain.
Falmouth:
Tuesday 17th, wind S,
blowing strongly.
Plymouth:
Wednesday 18th, wind SW moderate
Thursday 19th, wind WSW and blowing hard [Falmouth wind NW]
Friday 20th wind SW hurricane with rain until
2pm, hail in the evening
Saturday 21sr wind SW hurricane
Sunday 22nd wind SW, blowing hard [Falmouth, wind W,
squally]
Monday 23rd wind SW, moderate
Tuesday 24th, wind W, moderate
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Apr
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Prevailing winds W and SW. Dry and cold in North,
especially cold on Sunday 12th.
Wet in West of England, with W and SW gales.
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May
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First week in May, charming weather, but no dust. Mild, warm rains and sunny weather,
excellent for the crops. Prevailing
winds W and SW.
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Jun
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Largely dry and warm.
Early thunderstorms, at Southwell a woman and child were killed by
lightning.
Tuesday 30th, Ball lightning in Hoxton. Full moon, wind WNW, showers.
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Jul
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Wednesday 1st, thunderstorm, lightning strikes
near Bath,
woman killed in her own home by ball lightning down the chimney.
In general there were heavy and frequent showers in the
early and mid part of the month.
Wind and weather shipping report:
Wed. 1st Plymouth SW, rain: Falmouth NW, fair
Thur. 2nd Plymouth WSW, rain: Falmouth s, heavy rain
Fri. 3rd Plymouth SW, rain; Falmouth NW showers
Sat. 4th Plymouth SW, rain: Falmouth NW fine,
later heavy rain
Sun. 5th Plymouth SW, fair: Falmouth variable, fresh
Mon. 6th Plymouth SE, rain: Falmouth
S, strong, rain
Tues. 7th Plymouth SW cloudy
Showery rain in this month filled the ears of corn in the
south, but in the north and east there
was hail and rain that was less welcome.
Wednesday 22nd thunderstorm Suffolk
Thursday 23rd Various thunderstorm, Portsmouth, Richmond, Berkshire [where 2 are killed]. Heavy storm of hail in Reading, also in Elmsett in Suffolk, corn [wheat] beaten down.
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Aug
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Early rain, including some heavy showers clearing around
Thursday 6th, wind veering to ENE.
Saturday 2nd, near Stratford, violent thunderstorm and rain,
killed 2 men and a cow. The Royal
Cornish Gazette ran an article on how to preserve life from lightning
strikes.
Fine and warm for rest of month, though cold at night with
mists.
Wed. 26th Plymouth
variable, sultry: Falmouth,
variable, fine
Thur. 27th Plymouth SSE, sultry: Falmouth E
Fri. 28th Plymouth SSW, sultry: Falmouth E
Sat. 29th Plymouth ESE sultry: Falmouth N
Sun. 30th Plymouth SW fair until evening, then
storm, rain and lightning and hail until 7am next morning: Falmouth SW fine,
then heavy rain.
Mon 31st Plymouth SW showery: Falmouth, N fresh breeze
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Sept
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Tuesday 1st, Plymouth, westerly wind, fair weather.
Sunday 6th Wellington/Salop thunderstorm and
rain lasting 2 hours; dreadful lighting at Coalbrookdale
14th September Thunderstorm, lightning and rain
for 2 hours Gloucester.
Generally a lot of rain in the north, but hard, drying
winds
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Oct
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A month of mainly fine weather.
Tues.6th Falmouth N, fair
Wed, 7th Plymouth SW rain: Falmouth SE
Thur. 8th Plymouth SW, rain: Falmouth SW
Fri. 9th Plymouth SE, hard rain, incessant
rain: Falmouth SW, heavy rain
Friday 9th near Salisbury, in a circle about 3
miles across, clear skies darkened, scattered clouds gathered then ‘exploded’
as a whirlwind arose causing damage to property. Lightning and thunder lasted 20 minutes,
then heavy rain with hail, some stones 3” across.
Sat. 10th Plymouth SE, cloudy, heavy rain.
Saturday 10th London, fine and warm day until evening
when a thunderstorm started, lightning for an hour before any rain, very
violent, lasted until 3am Sunday 11th.
Sun. 11th Plymouth SE, fair; Falmouth S
Mon. 12th Plymouth
variable; Falmouth,
variable
Tues. 13th Plymouth, SW, fair, wheat down to
18/6d from 27/6d a fortnight previously.
Tuesday 20th [full moon 21st] Lunar
rainbow observed at Edinburgh
on the Western horizon; a full bow for half an hour.
Thursday 22nd very inclement weather.
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Nov
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Tuesday 3rd heavy seas in the channel and
storms
Wednesday 25th tempestuous weather, much damage
at Margate,
destroying Hubbard’s bathing room, Tennant’s shop and Hughes’s hot baths, and
broke down portions of the parade in front of Mitchener’s Hotel.
Friday 27th tempestuous weather all around
coasts at night, storm NNE to NE, hail and rain. Ships sunk and driven inshore.
Saturday 28th Shrewsbury, mail delayed by deep snow in
parts of Worcestershire and Goucestershire, the coach having often to quit
the roads and travel over fields. Near
Marlborough,
drifts were several feet deep.
Rain at end of month
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Dec
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Intense frost throughout month
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1802
A dry year especially in London and the South
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Jan
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Intense frost but dry throughout the month, but in the
south west of the country cold wet weather at beginning of the month, killing
newborn lambs.
Wednesday 20th and Thursday 21st
hurricanes across the land. In Manchester several
houses blown down and 4 people crushed to death. Several vessels on the
Mersey foundered as well as houses blown down in Liverpool. Ships sunk at anchor, much loss of
life. A servant girl near Doncaster killed by a falling chimney.
This great gale extended in a lessened form to the 28th
of the month off and on, becoming severe again on the 28th.
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Feb
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Frost at beginning
of month, rain in later part
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Mar
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Prevailing winds W and SW; on the whole fine weather.
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Apr
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Prevailing winds W and SW, fine and warm weather, late
showers
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May
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Changeable temperature in the onset of the month with cold
and severely frosty nights. Very
little rain throughout, and most of month cold. Prevailing winds W and SW.
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Jun
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Light showers at first but general drought. Cool weather. ? low 50s F
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Jul
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Drought ends with cold rain throughout the month, cold
weather and high winds. Rain
continuous and heavy in later part of month.
Tuesday 20th Thunderstorms in Scotland, much rain in Aberdeen
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Aug
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Remarkably fine and dry, bountiful harvest
Wednesday 25th Newcastle, thunderstorm with heavy wind and
hail.
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Sept
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Fine and very dry on the whole.
Wednesday 8th, sudden storm of wind and rain,
then thunder and lightning for about an hour, fairly widespread.
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Oct
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Fine and mild, dry at beginning of month, late mild rain.
Friday 8th Brighton,
storm from SW
Wednesday 13th Swansea, a fine day for a balloon ascension
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Nov
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Mild for time of year, some gentle rain
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Dec
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Mild temperatures for time of year throughout
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1803 On the
whole a dry year but seldom 10 days at a stretch without rain. However it was dry enough for many springs
to dry up, to be replenished after October.
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Jan
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Severe weather following the warmth of the previous month;
severe frosts.
Saturday 8th [day after full moon] about
midnight a hurricane from ESE, rain and sleet, Newcastle bears the brunt.
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Feb
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Milder weather, frosts largely dissipate after the early
part of the month.
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Mar
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Early frosts, then finer weather. In Midlands,
the early frosts were severe.
Prevailing winds W and SW.
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Apr
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Generally dry weather.
In Yorkshire and the north frosty
nights between 18th and 20th, then several days stormy
and tempestuous.
Sunday 24th wind and light showers on the
Sunday promenade in Hyde Park and Kensington
Gardens, with a ‘blush
of sunshine’. Then sudden storms and a
torrent of rain scattered the promenaders to Piccadilly to avoid the storm,
doubtless with many a blush at suddenly transparent muslin. Prevailing winds W and SW.
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May
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Cold northerly winds at the beginning of the month, but
warm gentle rains towards the close, by which time prevailing winds W and SW
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Jun
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Frequent but not torrential rains, but insufficient to
relieve drought especially in Scotland
[the wrong type of rain, no doubt, as our modern water board would put
it.] Some burning hot days but cold
nights.
Monday 6th violent thunderstorm which did
damage across the country.
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Jul
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Fine and warm
[Saturday 9th July fire broke out in tower of Westminster Abbey; roof fell in before
fire was under control but no damage to monuments. ]
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Aug
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Continuous heat and sunshine. Rain in North, uninterrupted fine weather
in Midlands.
Too dry for some crops to survive.
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Sept
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Unusually fine weather, with late, fine rains
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Oct
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Largely fine, rain at beginning of month, but still
something of a drought
[Friday 2nd Astley’s Amphitheatre burned down
as well as some houses behind it; Mrs Wood, mother of Mrs Astley, lost her
life.]
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Nov
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Wet, especially near start of month, but heavy rains
throughout month.
Sunday 13th a most beautiful vivid meteor seen
in London and
other parts of the country about 8pm.
Some reported a noise like thunder accompanying it.
Tuesday 22nd South Coast,
rain, hail, thunder and lightning, W and WSW winds; storms across South. At Bromswell the storm was preceded by an
explosion in the air, followed by a ‘heavy noise’ for a few seconds, striking
those observing it temporarily blind from the flash, and a strong sulphurous
smell, followed by torrents of rain.
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Dec
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Snow and frost at beginning of month, then thaw and much
rain.
Tempestuous weather in the last week of the month
especially along the Sussex
coast especially Sunday 25th and Monday 26th. Average temperatures 40.4 ° Fahrenheit in London, and temperature
on 24th was 2° higher than on June 24th 1802!
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1804
Dry summer continuing well into September with pleasant weather
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Jan
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Much rain throughout the month, but mild
temperatures. Tempest of wind and rain
towards the end of the month.
Thursday 19th tremendous gale and storm from
SW Gloucester and other parts of the
county; struck in Plymouth
on Friday 20th. Gales along
the coast for several days. Damage done to the shipping at Falmouth on the 25th; reckoned a
worse storm than the one the previous month.
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Feb
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Dry; frosts and thaws
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Mar
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Largely fine in South with late sharp strong winds and
frosty. Weather in North more severe.
Prevailing winds W and SW
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Apr
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Strong frosty winds to open the month, and cold rains prevailing to near the end of the
month. Prevailing winds W and SW.
Monday 30th Brighton,
2 hours before daybreak a tremendous thunderstorm with hail and rain, thunder
and sheet lightning, so loud that many supposed the French had landed and the
noise was artillery flashes and reports.
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May
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Very fine weather.
Prevailing winds W and SW
Friday 4th Cheshire
and Somerset storm of rain described as tropical in its
intensity. Part of Berchen cliff fell.
Monday 7th Lewes tempest and heavy rains
commencing after midnight and finishing between 6am and 7am.
Tuesday 8th foggy at sea; Manchester,
violent storm; tornado at Bolton and ball of
lightning.
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Jun
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Dry and warm.
Sunday 24th June, Brighton,
it was sultry all day; the Steyne had a military parade, and shortly after it
was over, around 8pm, a storm with rain and hail until 11pm. At 10-30 ball lightning came down a chimney
but no-one was harmed. It passed out through the window and exploded in a
sulphurous reek. The houses were
shaken by thunder. In Woolwich, the
same storm’s lightning set light to the rigging of a sheer hulk. It struck again and blinded two
sailors. The storm was experienced as
far north as Bucks. In London a woman was
killed by lightning in Grosvenor
Square.
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Jul
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Dry and warm in South, heavy rains in North.
Wednesday 11th thunderstorm about 3pm of great
severity in the region of Glasgow;
a girl killed by lightning. Ball lightning and rain.
Sunday 15th violent storm in Norfolk,
Suffolk and eastern Essex,
ricks set on fire, and two men, a dog and a cow struck dead by lightning,
others singed or burned by it.
Tuesday 31st storm on coast of France.
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Aug
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Wednesday 1st heavy gales in the West; ship driven from mooring
Thursday 2nd thunderstorms in Ireland
Friday 3rd
tempests in East; Thunderstorms Western England and ball lightning at
Brailsford. Vivid lightning Shropshire, and rain heavy enough to damage crops. 2” rain in Hampshire.
Fine dry weather with some rain, but moderate, and mostly
in North for rest of month.
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Sept
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Fine weather, still dry on the whole
Friday 14th, Plymouth SSW, cloudy
Saturday 15th Plymouth, sultry until noon then storm of
thunder and lightning, lasting about an hour.
Sunday 16th Plymouth, SW, fair.
Monday 17th Plymouth, SW, fair and sultry. St
Lambert’s day celebrated
Tuesday 18th, Plymouth ESE, cloudy and sultry
Before Tuesday 18th: [reported on that date as
‘lately’] Small tornado out of sultry weather at Whitby. [probably the 15th?]
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Oct
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Rain, but mild
Friday 26th Plymouth SSE, fair
Saturday 27th Plymouth SSW hurricane force,
blowing up overnight and continuing into the day: Falmouth,
wind S. Bristol also has hurricane.
Sunday 28th Plymouth SW blow hard and rain: Falmouth wind S
Monday 29th Plymouth SW, rain: Falmouth SE
Tuesday 30th Plymouth SW, cloudy: Falmouth S
Wednesday 31st Plymouth,
SW: Falmouth
SW
Wednesday 31st Cornwall, storm of thunder and lightning
and sudden gusts of wind. Hereford dreadful storm of thunder and lightning in
the evening, and at around 10pm a tornado that levelled 130 apple and pear
trees in a swathe 200 yards in length and 40 yards in breadth. Those to
either side were uninjured. Wind SE
and NW changing momentarily. 10 or 12
oaks destroyed in wood at end of the orchards. Before and after tornado,
night very dark and calm. Heavy rain fell at intervals and frequent flashes
of lightning.
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Nov
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Rain for much of month.
Thursday 1st Falmouth SW
Friday 2nd Falmouth, N
The astronomer La Lande calculated that more rain had
fallen in the last 9 months than had fallen in the preceding 27 months.
Sunday 4th, Glasgow heavy wind and swell in harbour
such that a ship parted its cables and blew away.
Sunday 18th conjunction of Venus and Saturn. Gales in the Channel.
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Dec
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Some rain and mild in first half of month. Dry frosty weather towards close of
month. Average temperature 37° F in London. Heavy snow in
middle of month in Scotland,
which delayed the London
mails on the 20th.
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1805
Wet summer in London
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Jan
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Sharp frosts through most of month and continuous rain in
the East
Sunday 6th and Monday 7th heavy rain
around Chester. In the south east there were also severe
storms and heavy rain and strong wind, and during the Sunday night rain, snow
and frost in turn.
Monday 21st The Serpentine being frozen,
hundreds of skaters repaired there, but decided it was unsafe. About 3 pm some score decided to test it,
and they skated for a while without mishap encouraging others. About 50 were on the ice when it gave way
simultaneously in 2 places. 4 men fell
through, one in attempting to rescue another, and all but 1 were saved using
ladders.
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Feb
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Mild
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Mar
|
Cold, dry weather
through much of month; winds as much from E and NE as from W and SW
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Apr
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Fine, some light seasonal rains at start of month, sharp
frosty night at end of month, generally dry.
8th Apr fine bright warm day.
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May
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Sharp cold winds from NE; cold, especially at night, often
frost in the mornings, wet weather.
Wind veered W at end of month.
As many winds during month from E and NE as from W and SW.
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Jun
|
Seasonal rains; heavy showers in Home Counties. North Easterly winds over much of month
caused damage to exposed fruit trees.
Friday 14th Plymouth wind NNW, cold rain:
Saturday 15th Plymouth wind NNW, cold. Falmouth, wind N
Sunday 16th Plymouth
wind variable, some light showers, cold evening: Falmouth wind W
.
Monday 17th Plymouth
wind W, cloudy and cold in the evening: Falmouth
wind W
Monday 17th Whitehaven, a torrent of rain
Tuesday 18th Plymouth wind NW, cloudy and cold. Falmouth, wind NNW.
Storm in the Yarmouth Roads [shipping lanes near Isle of
Wight].
Wednesday 19th Plymouth
wind NNW: Falmouth,
wind N
Thursday 20th Falmouth wind N
Friday 21st Falmouth wind variable
Friday 28th London about noon, tremendous storm or
rain, hail, lightning and thunder, lasting 20 minutes. Many windows were broken and the streets
deluged rising so high in Clement’s Lane, some 2-3’ deep, that a stall was
carried away. The hailstones were the
size of marbles. Kingston-upon-Thames,
a dreadful storm with torrents of hail and rain. Rain ran off hills, and
lightning caused much damage. Floods in low lying areas.
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Jul
|
Fine weather, after cold winds and dull weather at start
of month, Average temperature 61.5° F
Monday 22nd Manchester, violent thunderstorm.
Tuesday 23rd Leeds
thunderstorm, and what appeared to be two sheets of fire descended on the
roof of a factory, but no harm was done.
In Craven a small boy was struck dead by lightning, and fires were
started by the lightning in various places.
Cheshire
in general suffered storms, also Staffordshire.
Monday 22nd to Thursday 25th
Carlisle and other parts of Cumbria
much rain fell, rendering the streets almost impassable. Thunder and lightning off and on.
This summer reckoned to have experienced more thunder than
in living memory.
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Aug
|
Fine weather on the whole
Rain and thunderstorms in middle of month improved the
hops.
Saturday 10th, full moon such as to cause very
high spring tides, and for the next three days
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Sept
|
Fine on the whole
Saturday 21st Margate, a torrent of rain about noon,
spoiling the public breakfast for the fashionable at Dandelion. It brightened
for them however by 3pm.
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Oct
|
Started fine and dry, but wet at end
Friday 25th hurricane followed by gusty weather
Devon.
Tuesday 29th,
weather deteriorates generally
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Nov
|
Relatively mild and moist
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Dec
|
Severe weather to open, with snow; generally cold wet
weather. Lowest temperature Tuesday 17th, 20° F, wind SW
[Polar maritime returning if anyone cares].
Average temperature 38.3° F
|