June 2024: In
contrast to 2023 June which was the hottest on record, 2024 was -0.7°C below
the 30 year average for the month at 15.9°C. It was the coolest June since
2019 when 15.8°C was recorded. The average minimum temperature of 11.8°C was
equal lowest with 2015 since 2013.
The lowest daily minimum temperature of 7.4°C on the 5th June was the lowest
for June since 2015 when 6.5°C was recorded.
It was the driest June, with 16.9 mm of rain, since 2018 when only 4.0 mm
was recorded. 2024's rainfall was 27.7% of the 30 year average. It was a
slightly sunnier than average June and on the 16th a record 30.35 MJ/m2 (megajoule
per square metre) were recorded, the highest of any month since this data
started in 2005. With 6 days of northerly winds recorded in June it was the
highest of any month since September 2022 and at least partly explains the
cooler month.
Spring 2024: The
spring of 2024 was the 3rd warmest with respect to the average temperature.
With a mean temperature of 11.8°C it was 1.1°C above the 1990-2020
30 year average. Continuous data for the city started in 1891. With respect
to the minimum spring temperatures 2024 was the warmest in 121 years of data
for Bristol. At 8.3°C it was 1.5°C above the 30 year average. The spring
rainfall of 2024 was the 11th wettest out of 143 years of data with 271.5mm.
The 30 year average 1991-2020 is 179.5mm so 2024 was 151% above the
average..
Annual 2023:
The The annual rainfall for Bristol in 2023 was 1247.6 mm This makes it the
2nd wettest year since this data started in 1853 for the city.
The wettest year was 1315.4 mm in 2012. The 30 year average for the city is
913.8 mm so 2023 represents 137% of the average
The annual average temperature for 2023 was 12.6°C. That was the second
warmest. 2022, with an annual average temperature of 12.7°C, was the warmest
since continuous records started in 1891. The 30 year average temperature
(1991-2020) for the city was 11.6°.
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
June.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).