Daily Report for 12th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.8 °C (+3.7) 06:54 5.6 °C (+1.9) 9.3 °C (+5.2), 2017 -2.2 °C (-6.3), 2013
Maximum Temperature 12.5 °C (+2.0) 14:16 10.4 °C (+0.3) 14.9 °C (+4.4), 2014 3.9 °C (-6.6), 2013
Mean Temperature 9.9 °C (+2.9) 7.9 °C (+1.1) 11.2 °C, 2017 0.7 °C, 2013
Minimum Humidity 61% 14:53 72% 87%, 2018 28%, 2015
Maximum Humidity 89% 00:15 89% 96%, 2012 76%, 2015
Mean Humidity 78% 81% 92%, 2018 50%, 2015
Minimum Pressure 1006 hPa 00:00 1016 hPa 1034 hPa, 2012 986 hPa, 2018
Maximum Pressure 1012 hPa 12:00 1022 hPa 1036 hPa, 2012 1000 hPa, 2018
Mean Pressure 1009 hPa 1019 hPa 1035 hPa, 2012 990 hPa, 2018
Mean Wind Speed 8.7 mph (+3.5) 5.3 mph (+0.1) 11.4 mph, 2020 1.5 mph, 2017
Maximum Wind Speed 17.9 mph 10:11 13.2 mph 25.6 mph, 2013 6.4 mph, 2014
Maximum Gust 28.5 mph 13:02 22.0 mph 39.3 mph, 2013 8.7 mph, 2014
Mean Wind Direction SSW
Rainfall 0.0 mm 17.9 mm (119%) 7.7 mm, 2019
Maximum Hourly Rain n/a 4.2, 2019
Maximum 10-min Rain n/a 2.6, 2019
Maximum Rain Rate n/a 53, 2019
Minimum Dew Point 4.8 °C 16:36 2.9 °C 6.7 °C, 2009 -10.3 °C, 2013
Maximum Dew Point 7.2 °C 00:22 6.6 °C 9.4 °C, 2017 -0.9 °C, 2013
Mean Dew Point 6.1 °C 4.8 °C 8.1 °C, 2009 -6.7 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.8 °C 06:55 6.1 °C 9.3 °C, 2017 -2.2 °C, 2013
Day Maximum (09-21) 12.5 °C 14:16 10.1 °C 14.9 °C, 2014 3.9 °C, 2013
Max 10m Temp Rise 0.6 °C 10:35 0.5 °C 0.8 °C, 2020 0.3 °C, 2019
Max 1hr Temp Rise 1.9 °C 10:35 1.3 °C 2.8 °C, 2020 0.8 °C, 2019
Max 1hr Hum Rise 9% 17:34 5% 17%, 2020 3%, 2018
Max 10m Temp Fall 0.4 °C 14:28 0.4 °C 1.8 °C, 2019 0.2 °C, 2017
Max 1hr Temp Fall 1.2 °C 17:13 1.1 °C 4.1 °C, 2019 0.8 °C, 2017
Max 1hr Hum Fall 9% 10:45 7% 19%, 2020 6%, 2010
Max 10m Wind Speed 14.4 mph 09:58 10.4 mph 20.6 mph, 2013 3.8 mph, 2016
Minimum Feels-like 3.7 °C 06:40 1.7 °C 9.0 °C, 2017 -10.8 °C, 2013
Maximum Feels-like 12.5 °C 14:15 10.3 °C 14.9 °C, 2014 1.7 °C, 2013
Mean Feels-like 8.3 °C 6.2 °C 11.5 °C, 2017 -4.7 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 9 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.7 °C (-1.8) 4.8 °C (-1.6) 11.9 °C (+5.5), 2014 3.1 °C (-3.4), 2017
Humidity Range 28% 17% 48%, 2015 9%, 2018
Pressure Range 6 hPa 6 hPa 22 hPa, 2019 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [58%]32 hrs (77%) [26%] 10 [96%], 2012 0 [0%], 2009
Wet Hours 031 hrs (151%) [11%] 7, 2019 , 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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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