Daily Report for 2nd July 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.5 °C (-0.8) 04:46 12.2 °C (-1.1) 19.3 °C (+6.0), 2010 9.8 °C (-3.5), 2014
Maximum Temperature 21.6 °C (-0.7) 14:37 21.4 °C (-1.0) 29.5 °C (+7.2), 2009 18.0 °C (-4.3), 2013
Mean Temperature 17.2 °C (-0.7) 16.7 °C (-1.0) 22.6 °C, 2018 15.3 °C, 2012
Minimum Humidity 54% 14:50 54% 63%, 2020 27%, 2018
Maximum Humidity 88% 04:50 89% 93%, 2012 63%, 2018
Mean Humidity 72% 73% 81%, 2020 43%, 2018
Minimum Pressure 1018 hPa 18:18 1016 hPa 1025 hPa, 2019 1003 hPa, 2013
Maximum Pressure 1021 hPa 00:12 1021 hPa 1027 hPa, 2019 1015 hPa, 2010
Mean Pressure 1020 hPa 1019 hPa 1026 hPa, 2019 1011 hPa, 2013
Mean Wind Speed 6.6 mph (+2.3) 5.2 mph (+1.0) 9.2 mph, 2016 2.1 mph, 2014
Maximum Wind Speed 16.3 mph 08:59 13.8 mph 21.6 mph, 2016 8.1 mph, 2011
Maximum Gust 24.0 mph 09:23 21.7 mph 37.1 mph, 2016 11.4 mph, 2011
Mean Wind Direction SW
Rainfall 0.5 mm 1.0 mm (34%) 5.9 mm, 2020
Maximum Hourly Rain 0.5 mm 21:54 1.8 mm, 2020
Maximum 10-min Rain 0.3 mm 21:54 1.4 mm, 2020
Maximum Rain Rate 0.7 mm/h 21:54 24 mm/h, 2020
Minimum Dew Point 10.5 °C 04:13 10.3 °C 12.1 °C, 2009 4.8 °C, 2016
Maximum Dew Point 13.3 °C 20:33 13.4 °C 18.8 °C, 2009 9.9 °C, 2016
Mean Dew Point 11.8 °C 11.6 °C 15.5 °C, 2009 7.2 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 12.5 °C 04:46 12.2 °C 19.3 °C, 2010 9.8 °C, 2014
Day Maximum (09-21) 21.6 °C 14:38 21.4 °C 29.5 °C, 2009 18.0 °C, 2013
Max 10m Temp Rise 0.5 °C 06:12 0.6 °C 0.9 °C, 2009 0.5 °C, 2010
Max 1hr Temp Rise 2.1 °C 06:57 2.3 °C 3.4 °C, 2009 1.5 °C, 2013
Max 1hr Hum Rise 11% 21:04 12% 22%, 2020 3%, 2010
Max 10m Temp Fall 1.3 °C 20:42 1.1 °C 1.6 °C, 2020 0.3 °C, 2010
Max 1hr Temp Fall 2.9 °C 21:21 2.6 °C 4.0 °C, 2020 1.0 °C, 2013
Max 1hr Hum Fall 10% 08:53 11% 13%, 2014 3%, 2010
Max 10m Wind Speed 12.6 mph 14:56 10.6 mph 16.8 mph, 2016 5.4 mph, 2011
Minimum Feels-like 14.1 °C 04:46 13.8 °C 21.2 °C, 2010 10.0 °C, 2014
Maximum Feels-like 24.1 °C 14:36 23.8 °C 30.7 °C, 2010 18.6 °C, 2013
Mean Feels-like 19.3 °C 18.8 °C 25.8 °C, 2010 15.6 °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 9.1 °C (+0.0) 9.1 °C (+0.1) 14.8 °C (+5.7), 2014 5.2 °C (-3.9), 2013
Humidity Range 34% 36% 53%, 2014 10%, 2010
Pressure Range 3 hPa 5 hPa 12 hPa, 2013 2 hPa, 2014
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4 [27%]9 hrs (70%) [30%] 15.2 [101%], 2018 0 [0%], 2013
Wet Hours 1
[Mean rain rate: 0.5 mm/h]
2 hrs (91%) [4.2%] 6, 2012 0, 2009
Cloud Cover unknown
Events None
Comments late sh
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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Webcam Summary of Cloud Conditions

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