November 2024: It was
a mild damp month with low values of sunlight and wind speed, but high
pressure values. Despite some strong winds around the 23rd
and 24th of November the average wind speed was lower than the longer term
average with 4 'calm' days. The November rainfall of 114.6 mm was 114% of
the 30 year average for the Bristol. The average temperature of 9.3°C was
0.9°C above the 30 year average of 8.4°C for the month. It was the calmest
November since this data started in 2005 with an average wind speed of 2.8
mph. The average since 2005 is 5.0 mph. The average pressure for the month
of 1019 mb was the highest since 1020 mb in 2007. It was the highest average
pressure of any month since May 2023. It was the second dullest November
since the data started in 2005.
There was a notable rainfall on the 23rd and 24th of November when 33.8 mm
was recorded on the 23rd and 35.4 mm recorded on the 24th. The 24 hour
rainfall on the 24th was the highest since 39.8 mm was recorded in 2012. The
maximum wind gust of 46 mph on the morning of the 24th was the 2nd highest
wind gust of the year so far. 51 mph was recorded in January. The maximum
daily temperature of 17.6°C recorded on the 23rd was the second highest
recorded for November since this data started in 1937. The lowest daily
maximum temperature of 3.2°C on the 19th was the lowest for November since
-2.1°C was recorded in 2010. The snowfall recorded on the 19th of the month
was the first for November since 2019.
Autumn 2024: It was
the coolest summer since 2015. It was still the joint 34th warmest, with
1921, in 134 years of complete data for the city of Bristol. With an average
temperature of 17.4°C it was 0.3°C below the 30 year average (1991-2020) of
17.7°C. The average maximum temperature of the summer of 21.4°C was 0.5°C
below the 30 year average. The average minimum temperature of 13.7°C was
0.1°C above the average temperature.
The summer rainfall was below average with 139.5 mm for the 3 month total.
It was the 24th driest in 143 years of data. The 30 year average summer
rainfall is 212.7 mm so 2024 was 66% of the average.
Annual 2023:
With respect to the autumn season, (September - November), it was the 4th
wettest on record in 143 years of data for Bristol. It was the 8th warmest
autumn on record in 134 years of data. The mean temperature was 12.6°C which
was 0.6°C above the 30 year average of 12.0°C. With a total rainfall of
430.3 mm in the autumn of 2024 it was 166% above the 30 year average of
258.8 mm. The previous wetter autumn was in 2000 when 487.4 mm was
recorded..
To
view a full report of the Bristol Annual Weather 2022 and a discussion of trends
etc click here. This is a Word created .doc document
which is produced annually for a couple of Bristol Naturalist Society
publications. Please acknowledge the source if quoting any of the contents.
Thank you.
The
2023 Annual summary is here:
http://www.bristolweather.org/weather2023annual.htm
For the full monthly summary please go here:
http://www.bristolweather.org/weather2024
November.htm
The
Meteorological site is situated in an urban housing area approximately one
mile to the south of the Centre of Bristol.
This area is in a district called Totterdown.
Statistical correlations with the Bristol
Meteorological Office site, that was
less than two miles to the North and was
situated on top of a City Centre office block, were generally good with
rainfall and barometric data particularly close.
The site of the station is approximately 34 metres above sea level with the
manual instruments mounted in a Stevenson screen. The screen is sited
centrally in a small concreted garden area. A Snowdon
rain gauge is mounted correctly in the ground but does not have the full open
space required around it. A Davis
Vantage Pro2 Plus automatic weather station (AWS) was
added in May 2005 and this is mounted 4 feet above a concrete shelter. The
wind data is gathered automatically from a Davis Vantage Pro2 Plus anemometer which is
sited 3.3 metres (10 feet) above the house top.
Manual observations are still taken at approximately 09:00 hours GMT every
day for rainfall and cloud cover. Rainfall manually recorded in the Snowdon rain gauge is entered for the previous day. The
wind data is constantly logged and automatically reset at 24:00 hours GMT
every day (in the summer BST -1 hour. The Davis rainfall tipping bucket was recalibrated in November 2005 and is now
consistently under 3% under recording (an improvement from installation in
May 2005 when 10% was more
typically the norm).
Since the arrival of the Davis
Vantage Pro2 Plus equipment in May 2005 temperatures, humidity and barometric
pressure are recorded from the new equipment. These figures will be more
accurate and will be taken at exactly 09:00 GMT (in the summer BST -1 hour)
as the data is now logged to a computer.
By default the Davis
equipment records every parameter for the 24 hour period 00:00 to 23:59 BST
or GMT. Data analysis will enable manual data extraction of temperatures and
rainfall to 09:00 GMT (adjusted in the summer). Due to the 0.2 mm (tipping
bucket) measurements of precipitation recorded by the Davis equipment the
Snowdon rain gauge will still be used due to its greater accuracy (see
above).