Daily Report for 28th April 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.6 °C (-0.2) 05:17 6.2 °C (+0.2) 9.8 °C (+3.0), 2014 0.1 °C (-6.7), 2013
Maximum Temperature 13.6 °C (-2.1) 15:39 15.0 °C (+0.7) 21.6 °C (+5.9), 2010 9.3 °C (-6.4), 2012
Mean Temperature 9.9 °C (-1.1) 10.5 °C (+0.4) 15.1 °C, 2010 7.0 °C, 2009
Minimum Humidity 63% 15:47 51% 88%, 2018 31%, 2015
Maximum Humidity 82% 05:16 88% 97%, 2009 77%, 2015
Mean Humidity 73% 71% 94%, 2012 52%, 2015
Minimum Pressure 1031 hPa 01:29 1013 hPa 1031 hPa, 2022 997 hPa, 2009
Maximum Pressure 1034 hPa 23:23 1020 hPa 1034 hPa, 2022 1005 hPa, 2009
Mean Pressure 1032 hPa 1016 hPa 1032 hPa, 2022 1001 hPa, 2009
Mean Wind Speed 2.2 mph (-2.7) 4.8 mph (-0.1) 7.4 mph, 2015 1.9 mph, 2017
Maximum Wind Speed 8.9 mph 12:25 13.2 mph 19.5 mph, 2016 7.4 mph, 2017
Maximum Gust 17.1 mph 01:12 22.0 mph 29.4 mph, 2016 10.5 mph, 2017
Mean Wind Direction ENE
Rainfall 0.0 mm 17.8 mm (45%) 13.1 mm, 2020
Maximum Hourly Rain n/a 2.9, 2020
Maximum 10-min Rain n/a 1.3, 2016
Maximum Rain Rate n/a 18, 2016
Minimum Dew Point 3.3 °C 00:18 2.8 °C 5.6 °C, 2018 -3.8 °C, 2015
Maximum Dew Point 7.4 °C 15:39 7.7 °C 11.0 °C, 2014 1.2 °C, 2015
Mean Dew Point 5.2 °C 5.2 °C 7.8 °C, 2014 -1.0 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 6.6 °C 05:18 6.2 °C 9.8 °C, 2014 0.1 °C, 2013
Day Maximum (09-21) 13.6 °C 15:39 15.0 °C 21.6 °C, 2010 7.9 °C, 2020
Max 10m Temp Rise 0.4 °C 07:57 0.7 °C 1.4 °C, 2009 0.2 °C, 2012
Max 1hr Temp Rise 1.5 °C 08:07 2.3 °C 5.5 °C, 2013 0.3 °C, 2018
Max 1hr Hum Rise 6% 01:47 10% 17%, 2021 3%, 2012
Max 10m Temp Fall 0.3 °C 19:01 0.7 °C 0.9 °C, 2009 0.2 °C, 2012
Max 1hr Temp Fall 1.1 °C 19:45 1.8 °C 2.0 °C, 2009 0.8 °C, 2012
Max 1hr Hum Fall 9% 08:07 11% 18%, 2013 2%, 2012
Max 10m Wind Speed 6.6 mph 12:25 10.1 mph 14.2 mph, 2016 5.1 mph, 2017
Minimum Feels-like 4.3 °C 06:43 3.6 °C 7.5 °C, 2010 -1.4 °C, 2013
Maximum Feels-like 13.8 °C 15:39 15.5 °C 22.2 °C, 2010 9.4 °C, 2012
Mean Feels-like 9.5 °C 10.0 °C 15.3 °C, 2010 5.7 °C, 2020
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 7.0 °C (-2.0) 8.8 °C (+0.5) 13.3 °C (+4.3), 2010 3.2 °C (-5.8), 2018
Humidity Range 19% 37% 53%, 2013 7%, 2018
Pressure Range 3 hPa 7 hPa 11 hPa, 2010 2 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [8%]139 hrs (93%) [40%] 11 [83%], 2015 0 [0%], 2012
Wet Hours 018 hrs (42%) [2.7%] 15, 2012 0, 2010
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 13.5 °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