Bristol Weather Station

Totterdown, Bristol, UK.

http://www.bristolweather.org

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

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May 2024: May 2024 was warmer than average. The mean temperature of 15.2C was 1.5C degrees above the 30 year average (1991-2020).The warmest May was in 1998 with an average temperature of 15.9C. The average daily minimum temperature for the month of 11.1C was equal highest in May in 122 years of data. Rainfall was above average at 136.7% of the 30 year average with 85.3 mm.
It was the least windiest May since the data started in 2006 with an average wind speed of 2.8 mph. The average wind speed for the month is 5.5 mph. The maximum gust in 2024 of 24 mph was the 2nd lowest since this data started in 1995.
It was a dull month with 51.4% of the maximum sunshine for a May. The average is 55.0%. It was the dullest May since 2017 which also had 51.4% of the maximum sunshine.

The highest daily maximum temperature of 27.3C on the 12th was the highest recorded for May since 2018 when 27.9C was recorded. The lowest daily mean temperature of 10.8C on 12th was the highest for May since 2014 when 11.1C was recorded. The highest daily mean of 20.3C on the 12th was the highest for May since 2012 when 22.0C was recorded..

Spring 2024: The spring of 2024 was the 3rd warmest with respect to the average temperature. With a mean temperature of 11.8C it was 1.1C 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 8.3C it was 1.5C 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 12.6C. That was the second warmest. 2022, with an annual average temperature of 12.7C, 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 May.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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