Bristol Weather Station

Totterdown, Bristol, UK.

http://www.bristolweather.org

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

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June 2022: The month was generally a quiet one with an average temperatures the same as the 30 year average and with rainfall slightly above the 30 year average
at 67.9 mm for the month. The average maximum temperature was 0.2C above the average whilst the average minimum temperature was 0.3C below the 30 year average. It was the sunniest June with 57.1% of the maximum sunshine since 2018 when the month saw 63.0%. Nearly all wind directions (90%) were from the NE (8 days), the SW (9 days) and WSW (10 days).
The highest daily minimum temperature of 15.8C on the 24th was the lowest for the month since 15.2C in 2015.

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: http://www.bristolweather.org/weather2021annual.htm

For the full monthly summary please go here: http://www.bristolweather.org/weather2022 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).

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