Daily Report for 29th June 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.3 °C (+2.3) 23:54 11.9 °C (-0.1) 17.3 °C (+4.3), 2010 10.0 °C (-3.0), 2014
Maximum Temperature 21.2 °C (-0.9) 14:45 22.4 °C (+1.5) 33.6 °C (+11.5), 2019 16.8 °C (-5.3), 2016
Mean Temperature 17.4 °C (+0.7) 17.4 °C (+0.7) 24.3 °C, 2019 14.5 °C, 2014
Minimum Humidity 59% 15:19 51% 71%, 2021 30%, 2019
Maximum Humidity 90% 10:28 89% 96%, 2009 74%, 2010
Mean Humidity 74% 70% 87%, 2021 53%, 2010
Minimum Pressure 1012 hPa 19:27 1015 hPa 1020 hPa, 2015 994 hPa, 2017
Maximum Pressure 1016 hPa 00:01 1020 hPa 1025 hPa, 2018 999 hPa, 2017
Mean Pressure 1014 hPa 1017 hPa 1023 hPa, 2013 996 hPa, 2017
Mean Wind Speed 4.7 mph (+0.3) 3.9 mph (-0.5) 11.2 mph, 2016 2.9 mph, 2014
Maximum Wind Speed 11.7 mph 17:29 12.1 mph 23.1 mph, 2016 8.8 mph, 2017
Maximum Gust 26.2 mph 01:12 19.8 mph 38.7 mph, 2016 13.6 mph, 2017
Mean Wind Direction SSW
Rainfall 1.2 mm 20.8 mm (46%) 2.9 mm, 2021
Maximum Hourly Rain 1.2 mm 10:15 1.6 mm, 2021
Maximum 10-min Rain 0.5 mm 09:37 0.8 mm, 2021
Maximum Rain Rate 3.6 mm/h 10:06 4.8 mm/h, 2021
Minimum Dew Point 9.8 °C 00:01 8.9 °C 12.8 °C, 2019 4.9 °C, 2011
Maximum Dew Point 14.7 °C 10:27 13.6 °C 19.8 °C, 2019 10.3 °C, 2020
Mean Dew Point 12.5 °C 11.4 °C 15.8 °C, 2019 6.6 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 15.6 °C * 05:24 12.2 °C 17.3 °C, 2010 10.4 °C, 2011
Day Maximum (09-21) 21.2 °C 14:46 22.4 °C 33.6 °C, 2019 16.8 °C, 2016
Max 10m Temp Rise 0.6 °C 13:45 0.7 °C 0.9 °C, 2020 0.4 °C, 2017
Max 1hr Temp Rise 1.9 °C 13:53 2.6 °C 3.3 °C, 2019 1.3 °C, 2021
Max 1hr Hum Rise 7% 10:11 10% 16%, 2018 4%, 2011
Max 10m Temp Fall 0.4 °C 15:26 0.6 °C 0.9 °C, 2014 0.2 °C, 2017
Max 1hr Temp Fall 1.1 °C 21:18 1.9 °C 3.0 °C, 2018 0.7 °C, 2017
Max 1hr Hum Fall 11% 14:37 12% 19%, 2012 6%, 2017
Max 10m Wind Speed 9.6 mph 17:33 9.3 mph 18.9 mph, 2016 6.5 mph, 2017
Minimum Feels-like 17.5 °C 00:20 12.8 °C 18.5 °C, 2010 10.2 °C, 2014
Maximum Feels-like 24.3 °C 14:30 25.1 °C 39.0 °C, 2019 19.1 °C, 2016
Mean Feels-like 19.9 °C 19.4 °C 28.8 °C, 2019 15.6 °C, 2014
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.9 °C (-3.2) 10.5 °C (+1.6) 19.7 °C (+10.6), 2019 4.1 °C (-5.0), 2021
Humidity Range 31% 38% 64%, 2019 18%, 2016
Pressure Range 4 hPa 4 hPa 11 hPa, 2019 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [13%]210 hrs (112%) [48%] 14 [93%], 2019 0 [0%], 2021
Wet Hours 2
[Mean rain rate: 0.6 mm/h]
24 hrs (68%) [3.5%] 3, 2021 0, 2009
Cloud Cover unknown
Events None
Comments am rn
Extra Comments
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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