Bristol Weather Station

Totterdown, Bristol, UK.

http://www.bristolweather.org

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

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June 2018: It was the warmest on record since continuous data started in 1891. The average temperature was 18.4C which beat the previous record of 18.0C set in 2006 and 2014.

It was the second driest June on record since this continuous data started in 1881. 2018 only saw 4.0mm of rain and the driest on record was 0.8mm in 1925.
It was the second sunniest June since this data started in 2005. 2018 had 63% of the maximum sunshine but in June 2010 it was 68% of the maximum.
The average pressure for June 2018 of 1020mb was the joint 3rd highest since this data started in 1994. The highest was June 2001 with 1022mb.

The lowest daily maximum of 17.6C on the 17th was the second highest since records began in 1960. The highest was 2003 with 19.0C on the 18th and 19th.
The lowest daily average temperature of 15.2C on the 17th was the second highest since this data started in 1993. the highest was 15.5C in 2003.

Annual 2017: The annual average temperature of 12.1C in 2017 was 0.8C above the 30 year average for Bristol. This makes 2017 the 3rd warmest year (equal with 1989, 1990 and 1997). Continuous records for average temperature having been found since 1891 in Bristol.

The Total rainfall for 2017 was 751.0 mm. This is 138.9 mm less than the 30 year average for Bristol and the driest year since 2011 when only
723.1 mm was recorded. 2017 was the 39th direst year in Bristol in 165 years of continuous annual data for the city.

It was the dullest year on record since this data started in 2005 with a annual average 0f 37.7% of maximum sunshine. The average is 40.0%..

The 2017 Annual summary is here: http://www.bristolweather.org/weather2017annual.htm

For the full monthly summary please go here: http://www.bristolweather.org/weather2018apr.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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