Daily Report for 28th June 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.6 °C (-1.3) 05:10 11.8 °C (-0.2) 16.4 °C (+3.5), 2015 11.1 °C (-1.8), 2016
Maximum Temperature 21.6 °C (-0.4) 15:05 22.5 °C (+1.6) 29.8 °C (+7.8), 2010 16.2 °C (-5.8), 2017
Mean Temperature 16.8 °C (-0.9) 17.4 °C (+0.7) 22.5 °C, 2010 14.8 °C, 2017
Minimum Humidity 48% 17:56 51% 82%, 2021 28%, 2010
Maximum Humidity 87% 05:39 89% 97%, 2009 71%, 2010
Mean Humidity 67% 70% 92%, 2021 47%, 2010
Minimum Pressure 1016 hPa 23:54 1015 hPa 1023 hPa, 2018 997 hPa, 2017
Maximum Pressure 1021 hPa 02:48 1020 hPa 1028 hPa, 2019 1003 hPa, 2017
Mean Pressure 1019 hPa 1017 hPa 1025 hPa, 2018 998 hPa, 2017
Mean Wind Speed 5.8 mph (+1.4) 3.9 mph (-0.5) 9.3 mph, 2020 3.1 mph, 2011
Maximum Wind Speed 15.3 mph 16:22 12.1 mph 19.7 mph, 2020 7.9 mph, 2017
Maximum Gust 26.2 mph 12:32 19.5 mph 32.3 mph, 2020 12.5 mph, 2014
Mean Wind Direction SW
Rainfall 0.0 mm 19.6 mm (45%) 9.4 mm, 2021
Maximum Hourly Rain 0.0 mm 6.3 mm, 2011
Maximum 10-min Rain 0.0 mm 3.0 mm, 2011
Maximum Rain Rate n/a 42, 2020
Minimum Dew Point 8.9 °C 17:49 8.9 °C 14.1 °C, 2021 5.1 °C, 2016
Maximum Dew Point 12.1 °C 12:08 13.6 °C 19.9 °C, 2012 11.8 °C, 2016
Mean Dew Point 10.4 °C 11.3 °C 15.7 °C, 2009 8.4 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.6 °C 05:10 12.1 °C 18.5 °C, 2011 11.1 °C, 2016
Day Maximum (09-21) 21.6 °C 15:05 22.5 °C 29.8 °C, 2010 16.2 °C, 2017
Max 10m Temp Rise 0.6 °C 06:21 0.7 °C 1.1 °C, 2009 0.2 °C, 2017
Max 1hr Temp Rise 2.6 °C 06:59 2.6 °C 3.0 °C, 2018 0.5 °C, 2017
Max 1hr Hum Rise 6% 18:44 10% 20%, 2016 1%, 2017
Max 10m Temp Fall 0.5 °C 09:53 0.6 °C 1.1 °C, 2020 0.2 °C, 2017
Max 1hr Temp Fall 1.2 °C 19:18 2.0 °C 2.9 °C, 2016 0.6 °C, 2017
Max 1hr Hum Fall 11% 09:06 12% 20%, 2009 3%, 2017
Max 10m Wind Speed 12.7 mph 15:44 9.3 mph 16.7 mph, 2020 5.6 mph, 2011
Minimum Feels-like 12.5 °C 04:51 12.6 °C 18.5 °C, 2021 11.1 °C, 2016
Maximum Feels-like 23.5 °C 15:05 25.1 °C 35.2 °C, 2012 19.4 °C, 2017
Mean Feels-like 18.3 °C 19.3 °C 26.4 °C, 2012 16.4 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.0 °C (+1.0) 10.7 °C (+1.8) 14.6 °C (+5.6), 2018 3.5 °C (-5.5), 2017
Humidity Range 39% 38% 54%, 2012 10%, 2017
Pressure Range 6 hPa 4 hPa 14 hPa, 2016 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [53%]208 hrs (115%) [49%] 14.5 [96%], 2010 0 [0%], 2017
Wet Hours 022 hrs (64%) [3.3%] 7, 2017 0, 2010
Cloud Cover unknown
Events None
Comments -
Extra Comments delayed tip removed
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 20.0 °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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