Daily Report for 25th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.0 °C (-0.9) 05:59 5.2 °C (+1.0) 8.1 °C (+3.2), 2010 0.0 °C (-4.9), 2013
Maximum Temperature 16.7 °C (+4.8) 13:44 12.7 °C (+1.9) 17.2 °C (+5.3), 2011 1.1 °C (-10.8), 2013
Mean Temperature 10.6 °C (+1.9) 8.9 °C (+1.5) 11.2 °C, 2010 0.6 °C, 2013
Minimum Humidity 49% 15:28 62% 79%, 2010 21%, 2017
Maximum Humidity 85% 07:13 89% 95%, 2010 68%, 2013
Mean Humidity 65% 77% 90%, 2010 50%, 2017
Minimum Pressure 1032 hPa 03:16 1021 hPa 1032 hPa, 2022 996 hPa, 2010
Maximum Pressure 1034 hPa 10:12 1027 hPa 1036 hPa, 2019 1003 hPa, 2010
Mean Pressure 1033 hPa 1024 hPa 1034 hPa, 2012 1000 hPa, 2010
Mean Wind Speed 1.6 mph (-3.6) 4.0 mph (-1.2) 9.8 mph, 2013 1.6 mph, 2011
Maximum Wind Speed 10.8 mph 11:15 12.3 mph 19.2 mph, 2013 7.1 mph, 2011
Maximum Gust 14.8 mph 13:13 19.8 mph 27.7 mph, 2013 8.7 mph, 2011
Mean Wind Direction ENE
Rainfall 0.0 mm 26.9 mm (86%) 4.9 mm, 2009
Maximum Hourly Rain n/a 2.3, 2009
Maximum 10-min Rain n/a 2.3, 2009
Maximum Rain Rate n/a 16, 2010
Minimum Dew Point 1.0 °C 03:02 2.5 °C 6.2 °C, 2010 -9.4 °C, 2017
Maximum Dew Point 6.9 °C 11:34 7.0 °C 11.8 °C, 2010 -4.4 °C, 2013
Mean Dew Point 4.0 °C 4.9 °C 9.7 °C, 2010 -5.5 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.0 °C 06:02 5.6 °C 10.7 °C, 2010 0.0 °C, 2013
Day Maximum (09-21) 16.7 °C 13:44 12.5 °C 17.2 °C, 2011 1.1 °C, 2013
Max 10m Temp Rise 0.9 °C 07:42 0.6 °C 1.3 °C, 2009 0.1 °C, 2013
Max 1hr Temp Rise 3.5 °C 08:23 1.9 °C 4.5 °C, 2020 0.3 °C, 2013
Max 1hr Hum Rise 6% 01:29 7% 10%, 2019 4%, 2013
Max 10m Temp Fall 0.4 °C 21:11 0.4 °C 1.0 °C, 2009 0.1 °C, 2013
Max 1hr Temp Fall 1.7 °C 22:09 1.4 °C 2.7 °C, 2015 0.3 °C, 2013
Max 1hr Hum Fall 14% 08:32 9% 19%, 2017 4%, 2013
Max 10m Wind Speed 7.6 mph 11:15 9.5 mph 14.6 mph, 2013 4.8 mph, 2011
Minimum Feels-like 3.0 °C 06:41 2.4 °C 5.0 °C, 2010 -7.0 °C, 2013
Maximum Feels-like 16.7 °C 13:44 12.7 °C 17.2 °C, 2011 -2.0 °C, 2013
Mean Feels-like 10.6 °C 7.9 °C 12.0 °C, 2010 -4.7 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.7 °C (+5.7) 7.5 °C (+1.0) 13.6 °C (+6.6), 2011 1.1 °C (-5.9), 2013
Humidity Range 36% 27% 59%, 2017 10%, 2013
Pressure Range 2 hPa 6 hPa 12 hPa, 2009 2 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10 [90%]132 hrs (147%) [50%] 11.3 [101%], 2020 0 [0%], 2013
Wet Hours 045 hrs (105%) [7.5%] 5, 2014 , 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 10.5 °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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Wind rose