Daily Report for 20th June 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.9 °C (-1.4) 05:20 11.6 °C (-0.1) 17.6 °C (+5.3), 2017 7.3 °C (-5.0), 2010
Maximum Temperature 22.2 °C (+0.8) 18:24 22.4 °C (+1.9) 30.3 °C (+8.9), 2017 18.2 °C (-3.2), 2021
Mean Temperature 16.7 °C (-0.3) 17.2 °C (+0.9) 23.6 °C, 2017 12.4 °C, 2010
Minimum Humidity 49% 17:29 51% 80%, 2021 36%, 2012
Maximum Humidity 85% 05:28 89% 96%, 2021 75%, 2010
Mean Humidity 67% 70% 90%, 2021 58%, 2012
Minimum Pressure 1017 hPa 00:01 1017 hPa 1022 hPa, 2009 1009 hPa, 2011
Maximum Pressure 1021 hPa 12:42 1021 hPa 1024 hPa, 2009 1012 hPa, 2021
Mean Pressure 1020 hPa 1019 hPa 1023 hPa, 2009 1010 hPa, 2021
Mean Wind Speed 3.1 mph (-1.3) 3.7 mph (-0.7) 6.7 mph, 2018 1.8 mph, 2014
Maximum Wind Speed 12.3 mph 10:43 11.7 mph 13.9 mph, 2020 7.3 mph, 2010
Maximum Gust 18.2 mph 11:07 18.9 mph 21.9 mph, 2019 10.3 mph, 2010
Mean Wind Direction NE
Rainfall 0.0 mm 15.7 mm (50%) 15.2 mm, 2016
Maximum Hourly Rain n/a 5.5, 2016
Maximum 10-min Rain n/a 1.5, 2015
Maximum Rain Rate n/a 42, 2015
Minimum Dew Point 8.5 °C 04:54 8.8 °C 13.3 °C, 2017 2.3 °C, 2010
Maximum Dew Point 12.1 °C 19:32 13.5 °C 18.1 °C, 2016 7.0 °C, 2010
Mean Dew Point 10.2 °C 11.3 °C 14.9 °C, 2018 5.0 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.9 °C 05:23 12.0 °C 17.6 °C, 2017 7.3 °C, 2010
Day Maximum (09-21) 22.2 °C 18:24 22.4 °C 30.3 °C, 2017 18.2 °C, 2021
Max 10m Temp Rise 0.7 °C 10:20 0.7 °C 1.5 °C, 2012 0.4 °C, 2015
Max 1hr Temp Rise 2.2 °C 07:09 2.5 °C 4.2 °C, 2012 1.4 °C, 2021
Max 1hr Hum Rise 10% 20:01 10% 14%, 2011 4%, 2021
Max 10m Temp Fall 0.7 °C 19:38 0.6 °C 0.7 °C, 2012 0.4 °C, 2010
Max 1hr Temp Fall 2.3 °C 20:29 2.0 °C 2.4 °C, 2017 1.2 °C, 2019
Max 1hr Hum Fall 12% 09:29 11% 17%, 2012 4%, 2015
Max 10m Wind Speed 9.4 mph 11:11 9.0 mph 10.6 mph, 2016 5.9 mph, 2017
Minimum Feels-like 11.5 °C 05:20 12.2 °C 20.6 °C, 2017 6.2 °C, 2010
Maximum Feels-like 24.4 °C 18:20 25.1 °C 34.6 °C, 2017 18.9 °C, 2010
Mean Feels-like 18.1 °C 19.1 °C 27.4 °C, 2017 12.0 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 11.3 °C (+2.3) 10.9 °C (+2.0) 12.8 °C (+3.8), 2014 5.8 °C (-3.2), 2021
Humidity Range 36% 38% 52%, 2012 16%, 2021
Pressure Range 4 hPa 4 hPa 8 hPa, 2016 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14 [93%]144 hrs (112%) [48%] 14 [93%], 2022 0 [0%], 2021
Wet Hours 018 hrs (74%) [3.8%] 8, 2016 0, 2010
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 19.5 °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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Webcam Summary of Cloud Conditions

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