Daily Report for 31st May 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.2 °C (+0.1) 05:45 8.9 °C (+0.7) 14.8 °C (+4.7), 2018 6.8 °C (-3.3), 2014
Maximum Temperature 25.3 °C (+6.9) 16:12 18.7 °C (+2.0) 25.3 °C (+6.9), 2009 13.2 °C (-5.2), 2016
Mean Temperature 17.4 °C (+3.5) 13.5 °C (+1.3) 18.1 °C, 2017 12.0 °C, 2016
Minimum Humidity 36% 16:25 46% 73%, 2018 35%, 2011
Maximum Humidity 85% 07:27 87% 97%, 2018 78%, 2020
Mean Humidity 64% 68% 88%, 2018 55%, 2020
Minimum Pressure 1024 hPa 17:41 1015 hPa 1024 hPa, 2009 1004 hPa, 2015
Maximum Pressure 1026 hPa 17:35 1021 hPa 1027 hPa, 2011 1012 hPa, 2015
Mean Pressure 1025 hPa 1018 hPa 1025 hPa, 2014 1007 hPa, 2015
Mean Wind Speed n/a (-4.7) 0.0 mph (-4.7) 7.2, 2016 1, 2014
Maximum Wind Speed n/a 0.0 mph 17, 2015 6.4, 2014
Maximum Gust n/a 0.0 mph 26.5, 2020 8.7, 2014
Mean Wind Direction n/a
Rainfall 0.0 mm 26.3 mm (52%) 12.4 mm, 2016
Maximum Hourly Rain n/a 5.8, 2016
Maximum 10-min Rain n/a 1.3, 2016
Maximum Rain Rate n/a 24, 2016
Minimum Dew Point 7.1 °C 01:31 4.1 °C 14.2 °C, 2018 0.2 °C, 2015
Maximum Dew Point 13.3 °C 13:42 10.4 °C 18.2 °C, 2018 8.8 °C, 2011
Mean Dew Point 9.9 °C 7.2 °C 15.9 °C, 2018 5.1 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.2 °C 9.1 °C 14.8 °C, 2018 6.8 °C, 2014
Day Maximum (09-21) 25.3 °C 18.7 °C 25.3 °C, 2009 12.9 °C, 2016
Max 10m Temp Rise n/a 14:36 0.7 °C 0.8, 2013 0.3, 2016
Max 1hr Temp Rise n/a 15:27 2.2 °C 3.4, 2014 0.8, 2016
Max 1hr Hum Rise n/a 14:26 8% 11, 2013 4, 2018
Max 10m Temp Fall n/a 14:26 0.5 °C 0.6, 2013 0.2, 2016
Max 1hr Temp Fall n/a 14:26 1.5 °C 2.6, 2013 0.6, 2016
Max 1hr Hum Fall n/a 15:27 13% 18, 2014 2, 2016
Max 10m Wind Speed n/a 0.0 mph 12.8, 2015 3.9, 2014
Minimum Feels-like n/a 0.0 °C 18.3, 2018 5.6, 2011
Maximum Feels-like n/a 0.0 °C 28.6, 2018 14.7, 2016
Mean Feels-like n/a 0.0 °C 22.7, 2018 12.4, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 15.1 °C (+6.8) 9.8 °C (+1.3) 15.1 °C (+6.8), 2009 2.3 °C (-6.0), 2016
Humidity Range 49% 41% 52%, 2011 17%, 2019
Pressure Range 2 hPa 5 hPa 15 hPa, 2011 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11.6 [79%]194 hrs (102%) [44%] 14.8 [100%], 2020 0 [0%], 2016
Wet Hours 028 hrs (69%) [3.7%] 7, 2015 0, 2009
Cloud Cover not available
Events None
Comments
Extra Comments
Issues Tmax corrected as unreliable
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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