Daily Report for 16th June 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.9 °C (-0.1) 05:13 11.4 °C (-0.1) 14.4 °C (+2.4), 2018 8.1 °C (-3.9), 2015
Maximum Temperature 29.1 °C (+8.1) 16:33 21.9 °C (+1.6) 29.1 °C (+8.1), 2022 17.3 °C (-3.8), 2011
Mean Temperature 21.8 °C (+4.0) 16.8 °C (+0.8) 22.1 °C, 2021 13.9 °C, 2010
Minimum Humidity 33% 12:31 51% 61%, 2019 33%, 2022
Maximum Humidity 91% 05:59 90% 92%, 2019 73%, 2018
Mean Humidity 59% 71% 78%, 2011 57%, 2015
Minimum Pressure 1021 hPa 00:45 1017 hPa 1027 hPa, 2014 999 hPa, 2016
Maximum Pressure 1024 hPa 13:12 1021 hPa 1029 hPa, 2014 1002 hPa, 2016
Mean Pressure 1023 hPa 1019 hPa 1028 hPa, 2014 1000 hPa, 2016
Mean Wind Speed 1.7 mph (-2.7) 3.5 mph (-0.9) 10.3 mph, 2012 1.7 mph, 2022
Maximum Wind Speed 9.5 mph 20:52 11.0 mph 23.0 mph, 2012 7.7 mph, 2016
Maximum Gust 13.7 mph 20:54 17.8 mph 35.1 mph, 2012 11.5 mph, 2016
Mean Wind Direction WSW
Rainfall 0.0 mm 14.7 mm (59%) 14.7 mm, 2011
Maximum Hourly Rain n/a 8.5, 2011
Maximum 10-min Rain n/a 1, 2021
Maximum Rain Rate n/a 7.2, 2021
Minimum Dew Point 9.5 °C 12:31 8.7 °C 11.5 °C, 2020 4.1 °C, 2010
Maximum Dew Point 14.9 °C 10:06 13.2 °C 19.7 °C, 2021 7.8 °C, 2010
Mean Dew Point 12.4 °C 11.0 °C 15.6 °C, 2021 6.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.9 °C 05:13 11.5 °C 14.6 °C, 2018 8.1 °C, 2015
Day Maximum (09-21) 29.1 °C 16:44 21.9 °C 29.1 °C, 2022 17.3 °C, 2011
Max 10m Temp Rise 0.8 °C 08:29 0.7 °C 1.2 °C, 2009 0.5 °C, 2010
Max 1hr Temp Rise 3.4 °C 06:45 2.5 °C 3.9 °C, 2009 1.5 °C, 2014
Max 1hr Hum Rise 7% 19:20 10% 21%, 2021 5%, 2017
Max 10m Temp Fall 0.5 °C 18:47 0.6 °C 1.1 °C, 2020 0.4 °C, 2014
Max 1hr Temp Fall 2.0 °C 20:17 2.0 °C 3.3 °C, 2021 1.0 °C, 2014
Max 1hr Hum Fall 13% 08:14 11% 16%, 2009 8%, 2010
Max 10m Wind Speed 7.5 mph 20:56 8.5 mph 16.2 mph, 2012 5.7 mph, 2015
Minimum Feels-like 13.2 °C 04:53 12.3 °C 16.0 °C, 2020 6.9 °C, 2010
Maximum Feels-like 32.0 °C 17:23 24.3 °C 34.6 °C, 2021 18.7 °C, 2012
Mean Feels-like 24.3 °C 18.6 °C 26.5 °C, 2021 13.6 °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 17.2 °C (+8.2) 10.5 °C (+1.6) 17.2 °C (+8.2), 2022 5.1 °C (-3.9), 2014
Humidity Range 58% 39% 58%, 2022 23%, 2018
Pressure Range 3 hPa 4 hPa 9 hPa, 2017 2 hPa, 2014
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12 [79%]115 hrs (112%) [48%] 12 [79%], 2022 0 [0%], 2014
Wet Hours 015 hrs (77%) [4%] 4, 2011 0, 2010
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 19.0 °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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