Bristol Weather Station

Totterdown, Bristol, UK.

For further information e-mail  Barry (change the "AT")




July 2022: The two notable items this month making the news on a larger scale than just local data was the exceptional maximum temperature on the 18th and the
continuing lack of normal amounts of rainfall.
The maximum temperature of 36.9C on the 18th July was the highest ever recorded at any Bristol site from data starting in 1937. The previous record was 36.0C recorded in the city on August 9th 2003. For the month overall it was the equal 7th warmest on record in 132 years of continuous data. The average temperature for 2022 was 20.0C. The highest recorded in Bristol was 21.7C in 1983. The highest daily mean temperature of 27.9C on the 19th was the joint highest of any month since this data started in 1993. The highest minimum temperature on the 19th of 22.2C was the highest of any month since the data started in 1960.

The monthly rainfall of 17.5 mm was only 25.4% of the 30 year average 1991-2020. This as the driest July since 13.3 mm was recorded in 2016 and the 12th driest July since records began in 1853 (13 years missing data). There was no measurable rainfall from the 4th to the 21st July and only 7 hours of rainfall. In the last 9 months, since November 2021, the rainfall total was 420.7 mm. The 30 year average (1991-2020) is 672.6 mm so the 9 months in question represents only 63% of the 30 year average.
The average wind speed for the month was 3.2 mph. This is the lowest for any July since the data started in 2005.The maximum daily pressture of 1033mb on 8th was the 2nd highest for the month since data started in 1995. The daily minimum pressure of 1009 mb on the 25th was the highest for a July.

Spring 2022 The spring of 2022 was the joint 4th warmest, with 2003, with respect to average temperatures with a mean temperature of 11.6C. Continuous data
for the city started in 1891. The spring rainfall of 2022 was the 24th driest out of 141 years of data with 131.5mm. The 30 year average 1991-2020 is
179.5mm so 2022 represents only 73% of the average.

Annual 2021: In 131 complete years of Bristol's average temperatures in 2021 it was the joint 10th warmest with (with 1999 & 2015) with an average temperature of 11.9C. The 2nd warmest month, after July, was September.
The annual rainfall of 891.1 mm for 2021 was 97.5% of the 30 year average (1991-2020) for the city of 913.8 mm. The wettest month was October with 145.6 mm (145.6%) of rainfall whilst the driest was November with only 14.1 mm (14.0%) of rain.
In 2021 the predominate wind direction was from the SW or WSW accounting for 42.7% of all the wind directions. The annual average pressure of 1017 mb
was the equal 3rd highest in 27 years of data at this site. It was the least windy year since data began in 2005 with regard to the average wind speed.
There were no wind gusts over 50 mph for the 1st time in 4 years. Thunder was only heard on 1 occasion. In 2021 there were only 4 occasions when snowfall was observed to fall and only 1 had any snow lying at 09:00 hours.

To view a full report of the Bristol Annual Weather 2021 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 2021 Annual summary is here:

For the full monthly summary please go here: July.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).

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