Daily Report for 30th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.2 °C (-2.0) 23:47 5.1 °C (+0.7) 12.3 °C (+7.1), 2017 0.1 °C (-5.2), 2013
Maximum Temperature 10.7 °C (-1.9) 15:00 12.8 °C (+1.7) 23.6 °C (+11.0), 2021 4.8 °C (-7.8), 2013
Mean Temperature 7.2 °C (-2.0) 8.9 °C (+1.2) 16.4 °C, 2017 2.4 °C, 2013
Minimum Humidity 74% 16:46 63% 83%, 2018 28%, 2021
Maximum Humidity 92% 06:04 90% 95%, 2010 76%, 2013
Mean Humidity 85% 78% 90%, 2018 58%, 2014
Minimum Pressure 1005 hPa 17:38 1021 hPa 1032 hPa, 2020 984 hPa, 2010
Maximum Pressure 1010 hPa 00:05 1027 hPa 1040 hPa, 2020 992 hPa, 2010
Mean Pressure 1007 hPa 1024 hPa 1035 hPa, 2020 988 hPa, 2010
Mean Wind Speed 4.1 mph (-1.1) 3.8 mph (-1.4) 7.7 mph, 2015 1.5 mph, 2021
Maximum Wind Speed 14.6 mph 20:48 11.9 mph 19.2 mph, 2015 7.4 mph, 2012
Maximum Gust 22.8 mph 21:46 19.2 mph 28.4 mph, 2015 10.2 mph, 2012
Mean Wind Direction NNE
Rainfall 0.2 mm 27.1 mm (72%) 10.8 mm, 2018
Maximum Hourly Rain 0.2 mm 3.5 mm, 2018
Maximum 10-min Rain 0.2 mm 0.9 mm, 2018
Maximum Rain Rate n/a 6.6, 2018
Minimum Dew Point 0.5 °C 23:30 2.5 °C 7.1 °C, 2017 -5.1 °C, 2013
Maximum Dew Point 6.6 °C 15:05 7.1 °C 10.5 °C, 2015 -2.2 °C, 2013
Mean Dew Point 4.8 °C 5.0 °C 8.2 °C, 2017 -3.7 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.4 °C * 07:03 5.5 °C 12.3 °C, 2017 0.7 °C, 2013
Day Maximum (09-21) 10.7 °C 15:00 12.6 °C 23.6 °C, 2021 4.8 °C, 2013
Max 10m Temp Rise 0.5 °C 14:11 0.6 °C 1.2 °C, 2021 0.3 °C, 2011
Max 1hr Temp Rise 1.4 °C 14:50 1.9 °C 5.3 °C, 2021 0.9 °C, 2011
Max 1hr Hum Rise 7% 18:19 7% 17%, 2015 4%, 2009
Max 10m Temp Fall 0.8 °C 17:57 0.4 °C 1.3 °C, 2020 0.3 °C, 2015
Max 1hr Temp Fall 2.0 °C 18:42 1.4 °C 3.8 °C, 2021 0.7 °C, 2018
Max 1hr Hum Fall 7% 22:00 9% 24%, 2014 7%, 2022
Max 10m Wind Speed 11.7 mph 20:33 9.1 mph 14.0 mph, 2015 5.4 mph, 2012
Minimum Feels-like -2.2 °C 21:46 2.3 °C 12.4 °C, 2017 -4.4 °C, 2013
Maximum Feels-like 10.7 °C 14:50 12.8 °C 23.6 °C, 2021 2.8 °C, 2013
Mean Feels-like 5.3 °C 7.9 °C 16.9 °C, 2017 -1.0 °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 7.5 °C (+0.2) 7.7 °C (+1.0) 19.8 °C (+12.5), 2021 2.0 °C (-5.3), 2011
Humidity Range 18% 26% 65%, 2021 12%, 2018
Pressure Range 6 hPa 6 hPa 12 hPa, 2015 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]132 hrs (121%) [41%] 11.5 [100%], 2021 0 [0%], 2011
Wet Hours 146 hrs (90%) [6.4%] 7, 2018 , 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 10.0 °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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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