Daily Report for 17th June 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.4 °C (+4.3) 05:57 11.7 °C (+0.2) 16.4 °C (+4.3), 2022 8.3 °C (-3.8), 2010
Maximum Temperature 31.9 °C (+10.8) 15:34 22.5 °C (+2.1) 31.9 °C (+10.8), 2022 14.8 °C (-6.3), 2011
Mean Temperature 25.1 °C (+7.5) 17.3 °C (+1.2) 25.1 °C, 2022 12.5 °C, 2011
Minimum Humidity 40% 16:23 50% 76%, 2021 35%, 2010
Maximum Humidity 81% 06:31 89% 95%, 2011 77%, 2015
Mean Humidity 54% 70% 88%, 2021 54%, 2022
Minimum Pressure 1019 hPa 18:08 1017 hPa 1026 hPa, 2014 995 hPa, 2011
Maximum Pressure 1024 hPa 00:05 1021 hPa 1028 hPa, 2014 1011 hPa, 2011
Mean Pressure 1021 hPa 1019 hPa 1027 hPa, 2014 1003 hPa, 2011
Mean Wind Speed 5.5 mph (+1.1) 3.6 mph (-0.8) 7.1 mph, 2015 1.3 mph, 2020
Maximum Wind Speed 16.3 mph 12:56 11.4 mph 17.0 mph, 2019 7.6 mph, 2021
Maximum Gust 26.2 mph 13:01 18.3 mph 26.6 mph, 2015 11.5 mph, 2017
Mean Wind Direction WSW
Rainfall 0.0 mm 14.7 mm (55%) 7.6 mm, 2011
Maximum Hourly Rain n/a 5.5, 2016
Maximum 10-min Rain n/a 3.1, 2016
Maximum Rain Rate n/a 54, 2016
Minimum Dew Point 11.7 °C 07:47 8.9 °C 15.0 °C, 2021 3.8 °C, 2014
Maximum Dew Point 17.4 °C 16:06 13.4 °C 18.5 °C, 2021 9.6 °C, 2014
Mean Dew Point 14.8 °C 11.2 °C 16.9 °C, 2021 8.0 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.4 °C 05:59 11.8 °C 18.0 °C, 2021 8.3 °C, 2010
Day Maximum (09-21) 31.9 °C 15:56 22.5 °C 31.9 °C, 2022 14.8 °C, 2011
Max 10m Temp Rise 0.9 °C 07:06 0.7 °C 0.9 °C, 2022 0.3 °C, 2011
Max 1hr Temp Rise 3.8 °C 07:44 2.6 °C 3.8 °C, 2022 1.2 °C, 2011
Max 1hr Hum Rise 8% 03:02 10% 17%, 2014 7%, 2011
Max 10m Temp Fall 0.5 °C 02:37 0.6 °C 0.8 °C, 2016 0.3 °C, 2013
Max 1hr Temp Fall 2.2 °C 03:10 2.0 °C 2.4 °C, 2017 1.1 °C, 2013
Max 1hr Hum Fall 23% 07:31 12% 23%, 2022 7%, 2009
Max 10m Wind Speed 14.0 mph 15:11 8.8 mph 14.0 mph, 2022 5.5 mph, 2020
Minimum Feels-like 18.8 °C 05:38 12.6 °C 20.1 °C, 2021 6.9 °C, 2010
Maximum Feels-like 37.5 °C 16:06 25.1 °C 37.5 °C, 2022 16.2 °C, 2011
Mean Feels-like 29.0 °C 19.2 °C 29.0 °C, 2022 13.8 °C, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 15.5 °C (+6.5) 10.8 °C (+1.9) 15.5 °C (+6.5), 2022 4.9 °C (-4.1), 2011
Humidity Range 41% 39% 50%, 2010 18%, 2021
Pressure Range 5 hPa 4 hPa 16 hPa, 2011 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11 [73%]126 hrs (115%) [50%] 13 [86%], 2010 0.1 [1%], 2021
Wet Hours 015 hrs (72%) [3.7%] 7, 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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