Daily Report for 24th April 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.9 °C (+1.5) 05:51 6.2 °C (+0.3) 12.4 °C (+6.0), 2011 2.7 °C (-3.8), 2016
Maximum Temperature 17.3 °C (+2.1) 15:07 15.3 °C (+1.2) 22.7 °C (+7.5), 2011 9.1 °C (-6.1), 2016
Mean Temperature 12.2 °C (+1.8) 10.7 °C (+0.8) 16.7 °C, 2011 6.5 °C, 2016
Minimum Humidity 49% 15:08 50% 60%, 2019 32%, 2010
Maximum Humidity 88% 06:32 88% 97%, 2012 71%, 2010
Mean Humidity 69% 71% 76%, 2014 51%, 2010
Minimum Pressure 1006 hPa 00:08 1011 hPa 1028 hPa, 2021 992 hPa, 2012
Maximum Pressure 1015 hPa 23:53 1019 hPa 1030 hPa, 2021 999 hPa, 2019
Mean Pressure 1009 hPa 1014 hPa 1029 hPa, 2021 995 hPa, 2019
Mean Wind Speed 6.9 mph (+2.0) 5.1 mph (+0.2) 8.4 mph, 2018 1.5 mph, 2014
Maximum Wind Speed 14.0 mph 15:45 13.7 mph 20.4 mph, 2018 7.4 mph, 2014
Maximum Gust 28.5 mph 01:13 22.5 mph 31.1 mph, 2018 11.4 mph, 2014
Mean Wind Direction NE
Rainfall 0.0 mm 14.9 mm (44%) 4.0 mm, 2012
Maximum Hourly Rain n/a 2.3, 2012
Maximum 10-min Rain n/a 0.6, 2012
Maximum Rain Rate n/a 5, 2012
Minimum Dew Point 3.4 °C 22:13 2.7 °C 7.5 °C, 2011 -6.3 °C, 2017
Maximum Dew Point 9.6 °C 11:17 7.8 °C 13.4 °C, 2019 3.2 °C, 2016
Mean Dew Point 6.3 °C 5.3 °C 10.0 °C, 2011 -0.1 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.9 °C 06:02 6.3 °C 12.4 °C, 2011 2.7 °C, 2016
Day Maximum (09-21) 17.3 °C 15:07 15.3 °C 22.7 °C, 2011 9.1 °C, 2016
Max 10m Temp Rise 0.8 °C 16:31 0.7 °C 1.5 °C, 2009 0.5 °C, 2011
Max 1hr Temp Rise 2.4 °C 09:59 2.4 °C 3.2 °C, 2010 1.4 °C, 2012
Max 1hr Hum Rise 8% 20:28 10% 23%, 2018 6%, 2010
Max 10m Temp Fall 0.6 °C 15:22 0.7 °C 0.8 °C, 2020 0.3 °C, 2012
Max 1hr Temp Fall 1.5 °C 19:40 1.8 °C 3.5 °C, 2020 1.3 °C, 2014
Max 1hr Hum Fall 12% 12:24 11% 22%, 2016 9%, 2013
Max 10m Wind Speed 10.8 mph 15:42 10.5 mph 15.5 mph, 2019 5.6 mph, 2011
Minimum Feels-like 4.1 °C 06:38 3.7 °C 12.9 °C, 2011 -0.9 °C, 2016
Maximum Feels-like 17.4 °C 15:01 15.8 °C 24.8 °C, 2011 8.8 °C, 2016
Mean Feels-like 11.5 °C 10.2 °C 18.0 °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 9.4 °C (+0.7) 9.1 °C (+0.8) 17.9 °C (+9.2), 2010 5.9 °C (-2.8), 2018
Humidity Range 39% 38% 50%, 2012 25%, 2019
Pressure Range 9 hPa 7 hPa 12 hPa, 2009 2 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 9 [69%]127 hrs (100%) [43%] 13 [100%], 2021 0 [0%], 2018
Wet Hours 016 hrs (43%) [2.8%] 4, 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