Daily Report for 27th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.8 °C (+0.7) 07:49 5.2 °C (+0.9) 6.7 °C (+1.6), 2010 -1.3 °C (-6.4), 2013
Maximum Temperature 13.1 °C (+0.9) 17:43 12.9 °C (+2.0) 18.2 °C (+6.0), 2012 3.4 °C (-8.8), 2013
Mean Temperature 8.5 °C (+0.8) 9.0 °C (+1.5) 11.3 °C, 2012 1.1 °C, 2013
Minimum Humidity 76% 18:04 62% 76%, 2022 34%, 2012
Maximum Humidity 95% 09:30 89% 95%, 2014 71%, 2012
Mean Humidity 86% 77% 86%, 2022 50%, 2012
Minimum Pressure 1030 hPa 23:40 1022 hPa 1035 hPa, 2012 990 hPa, 2016
Maximum Pressure 1035 hPa 23:31 1028 hPa 1038 hPa, 2012 1001 hPa, 2009
Mean Pressure 1033 hPa 1025 hPa 1036 hPa, 2012 998 hPa, 2009
Mean Wind Speed 2.1 mph (-3.1) 3.9 mph (-1.3) 8.3 mph, 2021 1.5 mph, 2019
Maximum Wind Speed 7.8 mph 17:27 12.0 mph 22.5 mph, 2016 7.0 mph, 2019
Maximum Gust 16.0 mph 02:13 19.6 mph 34.4 mph, 2016 10.5 mph, 2017
Mean Wind Direction ENE
Rainfall 0.0 mm 26.9 mm (79%) 7.0 mm, 2016
Maximum Hourly Rain n/a 2.6, 2016
Maximum 10-min Rain n/a 1.3, 2016
Maximum Rain Rate n/a 30, 2010
Minimum Dew Point 4.1 °C 05:43 2.6 °C 4.1 °C, 2022 -7.3 °C, 2013
Maximum Dew Point 9.0 °C 17:12 7.1 °C 10.8 °C, 2018 -3.8 °C, 2013
Mean Dew Point 6.3 °C 4.9 °C 6.3 °C, 2022 -5.5 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 5.8 °C 06:48 5.6 °C 7.0 °C, 2010 -1.3 °C, 2013
Day Maximum (09-21) 13.1 °C 17:43 12.7 °C 18.2 °C, 2012 3.4 °C, 2013
Max 10m Temp Rise 0.4 °C 16:13 0.6 °C 1.0 °C, 2012 0.4 °C, 2013
Max 1hr Temp Rise 1.7 °C 16:59 1.9 °C 3.5 °C, 2012 1.1 °C, 2010
Max 1hr Hum Rise 7% 23:53 7% 17%, 2014 5%, 2011
Max 10m Temp Fall 0.4 °C 19:06 0.4 °C 1.4 °C, 2016 0.2 °C, 2013
Max 1hr Temp Fall 1.8 °C 19:57 1.4 °C 3.1 °C, 2016 0.7 °C, 2013
Max 1hr Hum Fall 6% 16:52 9% 16%, 2014 6%, 2022
Max 10m Wind Speed 5.6 mph 11:12 9.3 mph 12.3 mph, 2018 4.7 mph, 2019
Minimum Feels-like 3.1 °C 07:39 2.4 °C 4.2 °C, 2010 -6.3 °C, 2013
Maximum Feels-like 13.9 °C 17:43 12.9 °C 18.2 °C, 2012 2.7 °C, 2013
Mean Feels-like 7.8 °C 8.0 °C 11.0 °C, 2012 -2.7 °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 7.3 °C (+0.2) 7.7 °C (+1.1) 13.5 °C (+6.4), 2012 4.3 °C (-2.8), 2016
Humidity Range 19% 27% 52%, 2014 19%, 2022
Pressure Range 5 hPa 6 hPa 11 hPa, 2018 1 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]132 hrs (135%) [46%] 11.4 [101%], 2012 0 [0%], 2022
Wet Hours 045 hrs (97%) [6.9%] 6, 2018 , 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