Daily Report for 26th May 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.2 °C (+0.9) 05:34 10.5 °C (+1.7) 14.9 °C (+4.6), 2018 5.1 °C (-5.2), 2013
Maximum Temperature 19.6 °C (+0.8) 15:48 19.7 °C (+2.1) 26.7 °C (+7.9), 2017 14.7 °C (-4.1), 2014
Mean Temperature 15.7 °C (+0.8) 15.0 °C (+1.9) 20.5 °C, 2017 11.3 °C, 2021
Minimum Humidity 67% 15:21 55% 67%, 2022 29%, 2012
Maximum Humidity 90% 05:53 90% 94%, 2009 75%, 2010
Mean Humidity 78% 74% 83%, 2014 50%, 2013
Minimum Pressure 1019 hPa 00:00 1017 hPa 1035 hPa, 2020 1005 hPa, 2011
Maximum Pressure 1024 hPa 23:25 1022 hPa 1038 hPa, 2020 1012 hPa, 2010
Mean Pressure 1022 hPa 1019 hPa 1036 hPa, 2020 1009 hPa, 2011
Mean Wind Speed 6.7 mph (+2.0) 3.8 mph (-0.9) 7.7 mph, 2011 2.3 mph, 2020
Maximum Wind Speed 16.2 mph 14:46 12.4 mph 20.1 mph, 2011 8.5 mph, 2014
Maximum Gust 28.5 mph 16:16 19.5 mph 28.5 mph, 2022 12.7 mph, 2020
Mean Wind Direction W
Rainfall 0.0 mm 23.6 mm (61%) 14.5 mm, 2011
Maximum Hourly Rain n/a 5.2, 2011
Maximum 10-min Rain n/a 3.8, 2011
Maximum Rain Rate n/a 80, 2011
Minimum Dew Point 9.5 °C 05:34 7.7 °C 13.1 °C, 2018 0.3 °C, 2013
Maximum Dew Point 13.7 °C 15:09 12.5 °C 18.5 °C, 2018 4.0 °C, 2013
Mean Dew Point 11.8 °C 10.1 °C 15.2 °C, 2018 2.1 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.2 °C 05:34 10.7 °C 15.1 °C, 2019 5.1 °C, 2013
Day Maximum (09-21) 19.6 °C 15:32 19.7 °C 26.7 °C, 2017 14.7 °C, 2014
Max 10m Temp Rise 0.5 °C 11:50 0.6 °C 0.8 °C, 2013 0.3 °C, 2014
Max 1hr Temp Rise 2.0 °C 06:54 2.3 °C 3.7 °C, 2020 1.2 °C, 2011
Max 1hr Hum Rise 4% 20:02 11% 15%, 2020 4%, 2022
Max 10m Temp Fall 0.3 °C 19:17 0.6 °C 1.1 °C, 2019 0.3 °C, 2010
Max 1hr Temp Fall 1.2 °C 20:08 1.9 °C 4.5 °C, 2020 1.2 °C, 2022
Max 1hr Hum Fall 6% 07:00 12% 21%, 2012 6%, 2010
Max 10m Wind Speed 12.9 mph 13:43 9.4 mph 13.1 mph, 2011 6.1 mph, 2015
Minimum Feels-like 12.3 °C 05:19 10.7 °C 17.8 °C, 2018 3.0 °C, 2013
Maximum Feels-like 22.7 °C 15:09 21.6 °C 31.0 °C, 2018 15.9 °C, 2014
Mean Feels-like 17.9 °C 16.4 °C 23.8 °C, 2018 11.1 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.4 °C (-0.2) 9.1 °C (+0.3) 15.3 °C (+6.7), 2020 4.2 °C (-4.4), 2011
Humidity Range 23% 35% 58%, 2012 22%, 2019
Pressure Range 5 hPa 6 hPa 15 hPa, 2009 2 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [14%]131 hrs (83%) [36%] 14.6 [100%], 2012 0 [0%], 2014
Wet Hours 032 hrs (96%) [5.2%] 10, 2014 0, 2010
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 17.5 °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 are initially pulled from the official weather station at Heathrow, and later adjusted by hand to reflect local conditions based on webcam observations. Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually. Cloud cover and Events are manually reported, often with multi-week delays.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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