Daily Report for 20th May 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.3 °C (-0.4) 05:34 8.3 °C (+0.8) 14.1 °C (+5.4), 2014 5.1 °C (-3.6), 2015
Maximum Temperature 19.2 °C (+2.2) 17:24 17.1 °C (+1.1) 27.4 °C (+10.4), 2020 11.7 °C (-5.3), 2012
Mean Temperature 13.5 °C (+0.9) 12.4 °C (+1.0) 21.1 °C, 2020 10.1 °C, 2012
Minimum Humidity 44% 17:37 48% 80%, 2012 36%, 2020
Maximum Humidity 92% 06:50 86% 93%, 2013 67%, 2011
Mean Humidity 68% 69% 85%, 2013 53%, 2011
Minimum Pressure 1017 hPa 20:31 1014 hPa 1030 hPa, 2010 1003 hPa, 2014
Maximum Pressure 1021 hPa 09:35 1019 hPa 1033 hPa, 2010 1010 hPa, 2014
Mean Pressure 1019 hPa 1017 hPa 1032 hPa, 2010 1006 hPa, 2014
Mean Wind Speed n/a (-4.7) 0.0 mph (-4.7) 5.8, 2012 1.5, 2019
Maximum Wind Speed n/a 0.0 mph 15.2, 2017 7.1, 2010
Maximum Gust n/a 0.0 mph 24.1, 2017 10, 2010
Mean Wind Direction n/a
Rainfall 0.0 mm 12.4 mm (38%) 1.5 mm, 2017
Maximum Hourly Rain n/a 1, 2017
Maximum 10-min Rain n/a 0.8, 2017
Maximum Rain Rate n/a 18, 2017
Minimum Dew Point 5.2 °C 20:29 3.6 °C 8.3 °C, 2010 1.1 °C, 2015
Maximum Dew Point 9.5 °C 08:51 9.2 °C 14.9 °C, 2010 5.7 °C, 2015
Mean Dew Point 7.2 °C 6.5 °C 11.6 °C, 2010 3.2 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.3 °C 8.6 °C 15.3 °C, 2014 5.1 °C, 2015
Day Maximum (09-21) 19.2 °C 17.1 °C 27.4 °C, 2020 11.7 °C, 2012
Max 10m Temp Rise 0.9 °C 12:38 0.8 °C 0.9 °C, 2009 0.4 °C, 2012
Max 1hr Temp Rise 2.4 °C 12:42 2.2 °C 3.5 °C, 2020 1.1 °C, 2012
Max 1hr Hum Rise 8% 22:45 9% 12%, 2018 2%, 2012
Max 10m Temp Fall 0.3 °C 13:27 0.5 °C 0.9 °C, 2017 0.2 °C, 2012
Max 1hr Temp Fall 1.5 °C 19:18 1.5 °C 2.8 °C, 2019 0.5 °C, 2012
Max 1hr Hum Fall 10% 11:16 14% 15%, 2018 5%, 2012
Max 10m Wind Speed n/a 0.0 mph 11.2, 2017 4.9, 2019
Minimum Feels-like n/a 0.0 °C 14.9, 2016 2, 2015
Maximum Feels-like n/a 0.0 °C 30.5, 2020 12.4, 2012
Mean Feels-like n/a 0.0 °C 23.1, 2020 9.5, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.9 °C (+2.5) 8.8 °C (+0.3) 15.1 °C (+6.7), 2020 3.1 °C (-5.3), 2012
Humidity Range 48% 38% 50%, 2020 7%, 2012
Pressure Range 4 hPa 5 hPa 13 hPa, 2015 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5.8 [40%]106 hrs (88%) [38%] 14.4 [100%], 2018 0 [0%], 2012
Wet Hours 013 hrs (52%) [2.8%] 1, 2013 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs, Wet hrs, Cloud cover and Events are based on manual equipment/observations (entered with a delay of 1-10 days); their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

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Wind rose