Daily Report for 11th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.7 °C (+4.7) 23:05 5.4 °C (+1.7) 11.0 °C (+7.0), 2017 -2.1 °C (-6.1), 2013
Maximum Temperature 12.9 °C (+2.5) 11:13 10.2 °C (+0.1) 16.9 °C (+6.5), 2017 0.6 °C (-9.8), 2013
Mean Temperature 10.6 °C (+3.6) 7.7 °C (+0.9) 13.4 °C, 2017 -0.8 °C, 2013
Minimum Humidity 71% 11:19 73% 83%, 2018 46%, 2015
Maximum Humidity 90% 21:46 89% 97%, 2009 79%, 2013
Mean Humidity 82% 82% 92%, 2018 66%, 2019
Minimum Pressure 1003 hPa 14:51 1017 hPa 1034 hPa, 2012 988 hPa, 2018
Maximum Pressure 1012 hPa 00:05 1023 hPa 1038 hPa, 2012 997 hPa, 2018
Mean Pressure 1006 hPa 1020 hPa 1036 hPa, 2012 992 hPa, 2018
Mean Wind Speed 7.0 mph (+1.8) 5.0 mph (-0.2) 15.1 mph, 2021 1.4 mph, 2016
Maximum Wind Speed 16.2 mph 13:45 12.8 mph 29.5 mph, 2020 6.7 mph, 2016
Maximum Gust 26.2 mph 13:15 21.4 mph 45.6 mph, 2021 8.7 mph, 2012
Mean Wind Direction SSE
Rainfall 3.6 mm 17.9 mm (129%) 3.6 mm, 2022
Maximum Hourly Rain 1.2 mm 21:20 2.4 mm, 2018
Maximum 10-min Rain 0.5 mm 21:00 2.0 mm, 2018
Maximum Rain Rate 3.6 mm/h 21:00 40 mm/h, 2018
Minimum Dew Point 6.5 °C 06:31 2.7 °C 6.5 °C, 2017 -9.0 °C, 2013
Maximum Dew Point 8.7 °C 16:44 6.5 °C 11.0 °C, 2017 -2.6 °C, 2013
Mean Dew Point 7.5 °C 4.7 °C 9.0 °C, 2017 -6.0 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.6 °C * 06:24 5.9 °C 11.0 °C, 2017 -1.0 °C, 2013
Day Maximum (09-21) 12.9 °C 11:10 9.8 °C 16.9 °C, 2017 0.2 °C, 2013
Max 10m Temp Rise 0.4 °C 07:15 0.4 °C 1.1 °C, 2011 0.2 °C, 2014
Max 1hr Temp Rise 1.2 °C 11:01 1.2 °C 2.8 °C, 2012 0.8 °C, 2021
Max 1hr Hum Rise 9% 13:36 5% 16%, 2021 3%, 2017
Max 10m Temp Fall 0.3 °C 12:50 0.4 °C 1.0 °C, 2020 0.2 °C, 2015
Max 1hr Temp Fall 1.3 °C 13:49 1.1 °C 2.3 °C, 2012 0.6 °C, 2019
Max 1hr Hum Fall 5% 10:58 7% 13%, 2012 4%, 2014
Max 10m Wind Speed 13.9 mph 13:15 10.1 mph 21.6 mph, 2021 3.8 mph, 2016
Minimum Feels-like 5.4 °C 22:45 1.5 °C 11.4 °C, 2017 -11.0 °C, 2013
Maximum Feels-like 13.2 °C 11:01 10.1 °C 18.7 °C, 2017 -3.9 °C, 2013
Mean Feels-like 10.1 °C 6.0 °C 14.2 °C, 2017 -7.6 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 20 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.2 °C (-2.2) 4.8 °C (-1.6) 11.9 °C (+5.5), 2009 2.7 °C (-3.7), 2013
Humidity Range 19% 16% 40%, 2009 13%, 2018
Pressure Range 9 hPa 6 hPa 16 hPa, 2021 1 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]26 hrs (69%) [23%] 9 [87%], 2016 0 [0%], 2022
Wet Hours 5
[Mean rain rate: 0.7 mm/h]
31 hrs (165%) [12%] 5, 2022 , 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 8.0 °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 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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