Daily Report for 9th April 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.1 °C (-3.6) 06:36 3.9 °C (-1.6) 9.1 °C (+3.4), 2020 2.1 °C (-3.6), 2022
Maximum Temperature 11.6 °C (-2.2) 15:44 11.4 °C (-2.0) 25.2 °C (+11.4), 2017 8.9 °C (-4.9), 2013
Mean Temperature 6.8 °C (-2.9) 7.5 °C (-1.8) 16.1 °C, 2017 5.8 °C, 2013
Minimum Humidity 39% 15:37 53% 93%, 2018 29%, 2017
Maximum Humidity 91% 02:47 88% 96%, 2012 71%, 2011
Mean Humidity 68% 73% 95%, 2018 55%, 2011
Minimum Pressure 1010 hPa 00:00 1006 hPa 1032 hPa, 2010 987 hPa, 2012
Maximum Pressure 1020 hPa 23:47 1017 hPa 1035 hPa, 2010 1001 hPa, 2013
Mean Pressure 1016 hPa 1011 hPa 1034 hPa, 2010 997 hPa, 2013
Mean Wind Speed 4.0 mph (-0.9) 6.5 mph (+1.6) 8.1 mph, 2012 2.0 mph, 2010
Maximum Wind Speed 13.1 mph 10:52 16.3 mph 17.6 mph, 2012 7.6 mph, 2010
Maximum Gust 19.4 mph 13:44 26.4 mph 27.5 mph, 2012 10.5 mph, 2010
Mean Wind Direction NW
Rainfall 0.0 mm 14.9 mm (118%) 8.0 mm, 2012
Maximum Hourly Rain n/a 1.3, 2018
Maximum 10-min Rain n/a 0.5, 2012
Maximum Rain Rate n/a 5.5, 2012
Minimum Dew Point -2.0 °C 15:37 0.0 °C 6.9 °C, 2018 -2.0 °C, 2022
Maximum Dew Point 3.1 °C 09:33 5.2 °C 11.1 °C, 2009 3.1 °C, 2022
Mean Dew Point 0.8 °C 2.8 °C 8.7 °C, 2009 0.8 °C, 2022
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.1 °C 06:36 4.2 °C 9.1 °C, 2020 2.1 °C, 2022
Day Maximum (09-21) 11.6 °C 15:44 11.4 °C 25.2 °C, 2017 8.9 °C, 2013
Max 10m Temp Rise 0.6 °C 12:02 0.7 °C 0.9 °C, 2017 0.2 °C, 2012
Max 1hr Temp Rise 2.1 °C 09:03 1.9 °C 4.3 °C, 2017 0.4 °C, 2018
Max 1hr Hum Rise 11% 20:49 12% 26%, 2017 1%, 2018
Max 10m Temp Fall 0.5 °C 12:15 1.0 °C 1.1 °C, 2021 0.2 °C, 2012
Max 1hr Temp Fall 1.6 °C 22:20 1.8 °C 3.2 °C, 2017 0.6 °C, 2018
Max 1hr Hum Fall 12% 10:35 10% 19%, 2016 1%, 2018
Max 10m Wind Speed 8.9 mph 13:23 12.5 mph 14.5 mph, 2012 5.4 mph, 2010
Minimum Feels-like -1.5 °C 01:17 -0.0 °C 8.1 °C, 2020 -2.0 °C, 2013
Maximum Feels-like 11.6 °C 15:39 11.7 °C 25.9 °C, 2017 8.3 °C, 2013
Mean Feels-like 5.7 °C 6.1 °C 16.4 °C, 2017 3.1 °C, 2013
Air-frost Hrs 0 hrs 0.6 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.5 °C (+1.4) 7.5 °C (-0.4) 18.8 °C (+10.7), 2017 1.6 °C (-6.5), 2018
Humidity Range 52% 36% 52%, 2022 3%, 2018
Pressure Range 10 hPa 10 hPa 20 hPa, 2012 3 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [66%]27 hrs (59%) [25%] 12.1 [100%], 2017 0 [0%], 2012
Wet Hours 016 hrs (116%) [7.4%] 18, 2012 0, 2010
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 9.5 °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