Daily Report for 16th March 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.9 °C (+1.6) 23:04 5.7 °C (+1.8) 8.3 °C (+4.0), 2012 3.4 °C (-0.9), 2009
Maximum Temperature 11.1 °C (+0.2) 15:56 11.0 °C (+0.7) 18.3 °C (+7.4), 2014 7.8 °C (-3.1), 2013
Mean Temperature 9.2 °C (+0.9) 8.3 °C (+1.2) 13.1 °C, 2014 6.3 °C, 2015
Minimum Humidity 83% 00:25 71% 83%, 2022 36%, 2014
Maximum Humidity 93% 16:40 90% 98%, 2011 71%, 2010
Mean Humidity 89% 82% 92%, 2011 58%, 2010
Minimum Pressure 1016 hPa 15:10 1016 hPa 1030 hPa, 2009 992 hPa, 2013
Maximum Pressure 1024 hPa 23:57 1023 hPa 1034 hPa, 2021 1001 hPa, 2013
Mean Pressure 1019 hPa 1019 hPa 1032 hPa, 2009 995 hPa, 2013
Mean Wind Speed 3.3 mph (-1.9) 4.9 mph (-0.3) 12.8 mph, 2019 3.3 mph, 2022
Maximum Wind Speed 16.5 mph 22:13 13.1 mph 27.1 mph, 2019 9.2 mph, 2010
Maximum Gust 24.0 mph 22:13 21.5 mph 44.9 mph, 2019 13.2 mph, 2010
Mean Wind Direction WSW
Rainfall 7.7 mm 26.7 mm (133%) 7.7 mm, 2022
Maximum Hourly Rain 2.7 mm 15:50 2.7 mm, 2022
Maximum 10-min Rain 1.0 mm 15:37 1.5 mm, 2018
Maximum Rain Rate 14 mm/h 15:38 26 mm/h, 2018
Minimum Dew Point 3.9 °C 23:02 3.2 °C 5.6 °C, 2019 -3.0 °C, 2010
Maximum Dew Point 10.0 °C 16:11 7.1 °C 10.0 °C, 2022 2.1 °C, 2010
Mean Dew Point 7.4 °C 5.2 °C 7.7 °C, 2019 -0.6 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 8.6 °C * 02:26 6.2 °C 10.3 °C, 2019 3.4 °C, 2009
Day Maximum (09-21) 11.1 °C 15:56 10.7 °C 18.3 °C, 2014 7.8 °C, 2013
Max 10m Temp Rise 0.3 °C 12:26 0.5 °C 1.3 °C, 2009 0.1 °C, 2012
Max 1hr Temp Rise 0.6 °C 12:37 1.3 °C 3.5 °C, 2009 0.4 °C, 2012
Max 1hr Hum Rise 4% 13:29 6% 16%, 2018 3%, 2011
Max 10m Temp Fall 0.6 °C 20:52 0.4 °C 1.3 °C, 2018 0.2 °C, 2012
Max 1hr Temp Fall 1.3 °C 18:11 1.2 °C 3.3 °C, 2021 0.4 °C, 2012
Max 1hr Hum Fall 3% 18:41 7% 22%, 2014 3%, 2022
Max 10m Wind Speed 12.3 mph 18:35 10.4 mph 20.4 mph, 2019 6.2 mph, 2010
Minimum Feels-like 1.2 °C 22:13 2.1 °C 5.9 °C, 2014 0.2 °C, 2020
Maximum Feels-like 12.4 °C 16:05 11.0 °C 18.3 °C, 2014 6.2 °C, 2013
Mean Feels-like 8.4 °C 6.8 °C 12.7 °C, 2014 3.0 °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 5.2 °C (-1.3) 5.3 °C (-1.1) 13.0 °C (+6.5), 2009 1.5 °C (-5.0), 2012
Humidity Range 10% 19% 47%, 2009 10%, 2022
Pressure Range 9 hPa 7 hPa 15 hPa, 2019 3 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]44 hrs (79%) [27%] 10.7 [100%], 2014 0 [0%], 2011
Wet Hours 9
[Mean rain rate: 0.9 mm/h]
44 hrs (161%) [11%] 9, 2022 , 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 8.5 °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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Webcam Summary of Cloud Conditions

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