Daily Report for 29th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.6 °C (+1.4) 08:11 5.1 °C (+0.8) 11.5 °C (+6.3), 2017 -1.3 °C (-6.5), 2013
Maximum Temperature 10.2 °C (-2.2) 17:22 12.8 °C (+1.9) 19.3 °C (+6.9), 2021 5.7 °C (-6.7), 2013
Mean Temperature 8.4 °C (-0.4) 9.0 °C (+1.3) 13.2 °C, 2017 2.1 °C, 2013
Minimum Humidity 77% 00:33 63% 83%, 2010 32%, 2014
Maximum Humidity 91% 08:19 89% 97%, 2010 70%, 2012
Mean Humidity 84% 77% 91%, 2010 53%, 2012
Minimum Pressure 1010 hPa 23:58 1021 hPa 1035 hPa, 2020 992 hPa, 2010
Maximum Pressure 1018 hPa 00:07 1028 hPa 1041 hPa, 2020 1004 hPa, 2010
Mean Pressure 1013 hPa 1024 hPa 1038 hPa, 2020 998 hPa, 2010
Mean Wind Speed 2.9 mph (-2.3) 3.8 mph (-1.4) 10.0 mph, 2015 1.2 mph, 2011
Maximum Wind Speed 10.9 mph 13:23 11.8 mph 27.3 mph, 2015 4.0 mph, 2017
Maximum Gust 14.8 mph 12:47 19.1 mph 42.0 mph, 2015 7.3 mph, 2017
Mean Wind Direction ENE
Rainfall 0.0 mm 26.9 mm (74%) 6.9 mm, 2016
Maximum Hourly Rain n/a 5, 2016
Maximum 10-min Rain n/a 1.5, 2016
Maximum Rain Rate n/a 24, 2016
Minimum Dew Point 5.0 °C 07:15 2.6 °C 7.7 °C, 2017 -7.5 °C, 2013
Maximum Dew Point 6.9 °C 17:20 7.2 °C 11.0 °C, 2021 -3.0 °C, 2013
Mean Dew Point 5.9 °C 5.0 °C 9.4 °C, 2017 -5.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 6.6 °C 08:07 5.5 °C 11.5 °C, 2017 -1.3 °C, 2013
Day Maximum (09-21) 10.2 °C 17:13 12.7 °C 19.3 °C, 2021 5.7 °C, 2013
Max 10m Temp Rise 0.3 °C 09:39 0.6 °C 1.0 °C, 2009 0.3 °C, 2010
Max 1hr Temp Rise 1.1 °C 15:24 2.0 °C 5.2 °C, 2019 0.9 °C, 2010
Max 1hr Hum Rise 5% 01:31 7% 28%, 2021 5%, 2010
Max 10m Temp Fall 0.3 °C 19:50 0.4 °C 1.4 °C, 2020 0.2 °C, 2010
Max 1hr Temp Fall 0.7 °C 20:00 1.4 °C 2.7 °C, 2012 0.7 °C, 2010
Max 1hr Hum Fall 4% 09:48 9% 26%, 2019 4%, 2022
Max 10m Wind Speed 8.5 mph 12:39 9.0 mph 19.0 mph, 2015 4.0 mph, 2011
Minimum Feels-like 3.4 °C 07:17 2.4 °C 11.8 °C, 2017 -5.6 °C, 2013
Maximum Feels-like 10.2 °C 16:57 12.9 °C 20.3 °C, 2021 3.7 °C, 2020
Mean Feels-like 7.3 °C 8.0 °C 14.2 °C, 2017 -1.3 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 6 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.6 °C (-3.7) 7.7 °C (+1.1) 14.3 °C (+7.0), 2019 3.5 °C (-3.8), 2017
Humidity Range 14% 27% 59%, 2014 8%, 2017
Pressure Range 8 hPa 6 hPa 14 hPa, 2015 3 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]132 hrs (125%) [43%] 11.4 [100%], 2019 0 [0%], 2017
Wet Hours 045 hrs (91%) [6.5%] 7, 2015 , 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