Daily Report for 23rd April 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (+2.7) 00:36 6.2 °C (+0.3) 11.7 °C (+5.3), 2019 1.7 °C (-4.7), 2021
Maximum Temperature 16.6 °C (+1.6) 14:29 15.2 °C (+1.1) 26.5 °C (+11.4), 2011 9.8 °C (-5.2), 2016
Mean Temperature 12.4 °C (+2.1) 10.6 °C (+0.7) 18.6 °C, 2011 6.7 °C, 2016
Minimum Humidity 59% 14:26 50% 59%, 2022 23%, 2021
Maximum Humidity 86% 04:29 88% 95%, 2012 68%, 2017
Mean Humidity 75% 71% 82%, 2012 52%, 2011
Minimum Pressure 1004 hPa 18:25 1012 hPa 1029 hPa, 2021 990 hPa, 2012
Maximum Pressure 1007 hPa 00:02 1019 hPa 1031 hPa, 2021 1002 hPa, 2012
Mean Pressure 1005 hPa 1015 hPa 1030 hPa, 2021 996 hPa, 2012
Mean Wind Speed 7.6 mph (+2.7) 5.0 mph (+0.1) 7.8 mph, 2018 1.7 mph, 2011
Maximum Wind Speed 16.9 mph 12:58 13.7 mph 21.5 mph, 2012 7.6 mph, 2010
Maximum Gust 28.5 mph 12:05 22.2 mph 28.5 mph, 2022 10.7 mph, 2015
Mean Wind Direction ENE
Rainfall 0.0 mm 14.9 mm (46%) 2.3 mm, 2012
Maximum Hourly Rain n/a 0.6, 2012
Maximum 10-min Rain n/a 0.6, 2012
Maximum Rain Rate n/a 5, 2012
Minimum Dew Point 6.3 °C 00:05 2.6 °C 6.7 °C, 2019 -6.3 °C, 2021
Maximum Dew Point 9.9 °C 12:01 7.7 °C 11.6 °C, 2019 3.5 °C, 2010
Mean Dew Point 8.1 °C 5.2 °C 8.2 °C, 2019 0.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.1 °C 00:36 6.3 °C 11.7 °C, 2019 1.7 °C, 2021
Day Maximum (09-21) 16.6 °C 14:29 15.2 °C 26.5 °C, 2011 9.8 °C, 2016
Max 10m Temp Rise 0.6 °C 13:34 0.7 °C 1.4 °C, 2011 0.5 °C, 2013
Max 1hr Temp Rise 1.5 °C 09:53 2.4 °C 4.9 °C, 2011 1.5 °C, 2022
Max 1hr Hum Rise 7% 15:26 10% 14%, 2012 5%, 2009
Max 10m Temp Fall 0.8 °C 14:44 0.7 °C 1.2 °C, 2009 0.4 °C, 2013
Max 1hr Temp Fall 1.4 °C 15:30 1.8 °C 2.7 °C, 2009 1.3 °C, 2018
Max 1hr Hum Fall 7% 14:23 11% 20%, 2021 5%, 2017
Max 10m Wind Speed 12.2 mph 13:06 10.5 mph 12.3 mph, 2018 7.4 mph, 2020
Minimum Feels-like 4.9 °C 01:12 3.7 °C 11.8 °C, 2019 -0.9 °C, 2016
Maximum Feels-like 17.6 °C 14:34 15.8 °C 26.9 °C, 2011 9.5 °C, 2016
Mean Feels-like 12.4 °C 10.2 °C 19.0 °C, 2011 4.9 °C, 2016
Air-frost Hrs 0 hrs 0.2 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.5 °C (-1.2) 9.1 °C (+0.8) 16.4 °C (+7.7), 2011 3.9 °C (-4.8), 2012
Humidity Range 27% 38% 69%, 2021 25%, 2017
Pressure Range 3 hPa 7 hPa 12 hPa, 2012 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [23%]118 hrs (97%) [42%] 13 [100%], 2010 0 [0%], 2019
Wet Hours 016 hrs (45%) [2.9%] 7, 2012 0, 2009
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 14.0 °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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Wind rose