Daily Report for 12th June 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.1 °C (+0.4) 05:21 11.6 °C (+0.3) 15.1 °C (+3.4), 2016 7.2 °C (-4.5), 2009
Maximum Temperature 21.9 °C (+1.2) 17:08 20.7 °C (+0.5) 25.1 °C (+4.4), 2015 13.3 °C (-7.4), 2012
Mean Temperature 17.2 °C (+0.8) 16.0 °C (+0.4) 19.4 °C, 2021 11.2 °C, 2012
Minimum Humidity 46% 17:10 55% 72%, 2016 35%, 2014
Maximum Humidity 85% 05:38 90% 98%, 2012 70%, 2017
Mean Humidity 64% 74% 88%, 2019 55%, 2014
Minimum Pressure 1023 hPa 17:30 1016 hPa 1026 hPa, 2014 1003 hPa, 2012
Maximum Pressure 1026 hPa 08:49 1020 hPa 1029 hPa, 2014 1010 hPa, 2016
Mean Pressure 1024 hPa 1018 hPa 1028 hPa, 2014 1007 hPa, 2020
Mean Wind Speed 4.8 mph (+0.4) 4.1 mph (-0.3) 7.9 mph, 2013 0.9 mph, 2014
Maximum Wind Speed 12.2 mph 16:51 11.7 mph 15.6 mph, 2011 5.6 mph, 2014
Maximum Gust 20.5 mph 01:13 19.4 mph 23.7 mph, 2013 8.7 mph, 2014
Mean Wind Direction WNW
Rainfall 0.0 mm 14.7 mm (78%) 7.1 mm, 2011
Maximum Hourly Rain n/a 3.1, 2019
Maximum 10-min Rain n/a 1.8, 2019
Maximum Rain Rate n/a 92, 2019
Minimum Dew Point 7.0 °C 22:00 8.8 °C 12.0 °C, 2021 2.9 °C, 2009
Maximum Dew Point 11.6 °C 09:41 13.2 °C 16.1 °C, 2016 9.8 °C, 2017
Mean Dew Point 9.9 °C 11.0 °C 13.6 °C, 2016 6.6 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 12.1 °C 05:20 11.6 °C 15.1 °C, 2016 7.2 °C, 2009
Day Maximum (09-21) 21.9 °C 16:22 20.7 °C 25.1 °C, 2015 13.3 °C, 2012
Max 10m Temp Rise 0.7 °C 16:48 0.6 °C 0.7 °C, 2011 0.3 °C, 2013
Max 1hr Temp Rise 1.8 °C 13:42 2.1 °C 3.6 °C, 2011 1.2 °C, 2013
Max 1hr Hum Rise 6% 01:16 10% 12%, 2011 3%, 2012
Max 10m Temp Fall 0.5 °C 14:34 0.6 °C 0.6 °C, 2014 0.3 °C, 2012
Max 1hr Temp Fall 1.7 °C 21:04 1.7 °C 2.7 °C, 2021 0.6 °C, 2012
Max 1hr Hum Fall 7% 08:25 10% 13%, 2018 5%, 2016
Max 10m Wind Speed 9.2 mph 13:57 9.2 mph 11.5 mph, 2013 3.6 mph, 2014
Minimum Feels-like 13.2 °C 05:06 12.5 °C 17.3 °C, 2016 7.2 °C, 2011
Maximum Feels-like 23.5 °C 15:33 23.1 °C 28.4 °C, 2015 14.4 °C, 2012
Mean Feels-like 18.4 °C 17.8 °C 22.3 °C, 2021 12.0 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.8 °C (+0.8) 9.0 °C (+0.2) 13.4 °C (+4.4), 2009 2.5 °C (-6.5), 2013
Humidity Range 39% 36% 46%, 2014 15%, 2016
Pressure Range 2 hPa 4 hPa 13 hPa, 2012 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [53%]65 hrs (85%) [36%] 13 [86%], 2014 0 [0%], 2012
Wet Hours 015 hrs (103%) [5.3%] 8, 2011 0, 2009
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 18.5 °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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