Daily Report for 13th April 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.0 °C (+5.2) 07:04 4.8 °C (-0.9) 11.0 °C (+5.2), 2022 -0.6 °C (-6.4), 2021
Maximum Temperature 18.7 °C (+4.6) 15:22 13.1 °C (-0.5) 18.7 °C (+4.6), 2022 8.8 °C (-5.3), 2019
Mean Temperature 14.3 °C (+4.9) 8.8 °C (-0.7) 14.3 °C, 2022 4.8 °C, 2019
Minimum Humidity 58% 15:54 52% 78%, 2018 39%, 2016
Maximum Humidity 89% 07:27 88% 97%, 2009 71%, 2017
Mean Humidity 77% 72% 87%, 2013 54%, 2016
Minimum Pressure 1012 hPa 00:02 1008 hPa 1032 hPa, 2021 1003 hPa, 2018
Maximum Pressure 1022 hPa 22:13 1017 hPa 1034 hPa, 2021 1006 hPa, 2012
Mean Pressure 1017 hPa 1012 hPa 1034 hPa, 2021 1005 hPa, 2012
Mean Wind Speed 5.1 mph (+0.2) 5.8 mph (+0.9) 9.6 mph, 2020 1.5 mph, 2016
Maximum Wind Speed 12.9 mph 13:04 15.3 mph 19.4 mph, 2020 7.4 mph, 2012
Maximum Gust 19.4 mph 11:19 24.7 mph 27.6 mph, 2020 10.0 mph, 2012
Mean Wind Direction WSW
Rainfall 0.0 mm 14.9 mm (82%) 6.5 mm, 2013
Maximum Hourly Rain n/a 2.1, 2013
Maximum 10-min Rain n/a 1.2, 2012
Maximum Rain Rate n/a 17, 2013
Minimum Dew Point 9.1 °C 07:04 1.3 °C 9.1 °C, 2022 -4.2 °C, 2021
Maximum Dew Point 11.3 °C 14:18 6.4 °C 12.5 °C, 2009 2.9 °C, 2011
Mean Dew Point 10.1 °C 3.9 °C 10.1 °C, 2022 -0.5 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.0 °C 07:07 5.0 °C 11.0 °C, 2022 -0.6 °C, 2021
Day Maximum (09-21) 18.7 °C 15:37 13.1 °C 18.7 °C, 2022 8.8 °C, 2019
Max 10m Temp Rise 0.5 °C 07:53 0.7 °C 1.2 °C, 2021 0.3 °C, 2018
Max 1hr Temp Rise 1.6 °C 14:39 2.2 °C 5.1 °C, 2021 1.3 °C, 2018
Max 1hr Hum Rise 8% 18:31 11% 19%, 2021 3%, 2017
Max 10m Temp Fall 0.3 °C 17:28 0.9 °C 1.3 °C, 2019 0.2 °C, 2018
Max 1hr Temp Fall 1.2 °C 18:29 1.7 °C 2.7 °C, 2019 0.7 °C, 2018
Max 1hr Hum Fall 6% 08:50 11% 25%, 2019 5%, 2018
Max 10m Wind Speed 11.3 mph 14:42 11.9 mph 14.5 mph, 2020 6.1 mph, 2012
Minimum Feels-like 11.9 °C 07:04 1.7 °C 11.9 °C, 2022 -2.9 °C, 2019
Maximum Feels-like 20.5 °C 15:22 13.6 °C 20.5 °C, 2022 8.6 °C, 2019
Mean Feels-like 15.6 °C 8.0 °C 15.6 °C, 2022 2.5 °C, 2019
Air-frost Hrs 0 hrs 0.4 hrs 5 hrs, 2021 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.7 °C (-0.6) 8.3 °C (+0.3) 12.5 °C (+4.2), 2021 5.6 °C (-2.7), 2018
Humidity Range 31% 35% 55%, 2012 17%, 2018
Pressure Range 10 hPa 10 hPa 13 hPa, 2020 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [16%]46 hrs (69%) [29%] 12.2 [99%], 2014 0 [0%], 2018
Wet Hours 016 hrs (80%) [5.1%] 7, 2013 0, 2010
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 10.5 °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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