Daily Report for 3rd July 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.7 °C (-1.6) 05:39 12.1 °C (-1.3) 18.6 °C (+5.3), 2009 11.4 °C (-1.9), 2016
Maximum Temperature 22.3 °C (-0.1) 13:52 21.7 °C (-0.7) 26.3 °C (+3.9), 2014 19.0 °C (-3.4), 2012
Mean Temperature 17.5 °C (-0.9) 17.0 °C (-1.0) 21.0 °C, 2014 16.5 °C, 2020
Minimum Humidity 48% 13:43 52% 75%, 2012 28%, 2014
Maximum Humidity 90% 05:52 89% 96%, 2012 66%, 2011
Mean Humidity 70% 72% 89%, 2012 46%, 2014
Minimum Pressure 1019 hPa 01:53 1017 hPa 1027 hPa, 2019 1003 hPa, 2013
Maximum Pressure 1023 hPa 23:56 1022 hPa 1029 hPa, 2019 1014 hPa, 2012
Mean Pressure 1020 hPa 1019 hPa 1028 hPa, 2019 1008 hPa, 2013
Mean Wind Speed 2.2 mph (-2.1) 4.2 mph (-0.1) 8.3 mph, 2020 2.2 mph, 2022
Maximum Wind Speed 8.3 mph 17:14 12.0 mph 23.5 mph, 2020 7.4 mph, 2011
Maximum Gust 24.0 mph 01:33 22.5 mph 31.1 mph, 2020 9.8 mph, 2011
Mean Wind Direction WNW
Rainfall 0.0 mm 1.0 mm (22%) 2.8 mm, 2012
Maximum Hourly Rain n/a 1.2, 2012
Maximum 10-min Rain n/a 0.6, 2013
Maximum Rain Rate n/a 4.6, 2012
Minimum Dew Point 9.9 °C 05:34 10.2 °C 14.1 °C, 2012 4.3 °C, 2014
Maximum Dew Point 13.8 °C 18:27 13.5 °C 17.6 °C, 2009 10.2 °C, 2011
Mean Dew Point 11.7 °C 11.6 °C 15.1 °C, 2021 8.2 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.7 °C 05:38 12.1 °C 18.6 °C, 2009 11.4 °C, 2016
Day Maximum (09-21) 22.3 °C 14:05 21.7 °C 26.3 °C, 2014 19.0 °C, 2012
Max 10m Temp Rise 0.7 °C 13:01 0.6 °C 0.9 °C, 2018 0.4 °C, 2012
Max 1hr Temp Rise 2.1 °C 06:55 2.2 °C 3.1 °C, 2018 1.1 °C, 2012
Max 1hr Hum Rise 8% 18:28 11% 15%, 2020 5%, 2009
Max 10m Temp Fall 0.5 °C 12:04 0.9 °C 0.7 °C, 2019 0.3 °C, 2012
Max 1hr Temp Fall 1.6 °C 19:30 2.3 °C 2.2 °C, 2020 0.9 °C, 2012
Max 1hr Hum Fall 14% 13:22 12% 14%, 2015 8%, 2012
Max 10m Wind Speed 6.6 mph 16:35 9.3 mph 14.7 mph, 2020 6.2 mph, 2011
Minimum Feels-like 12.9 °C 05:26 13.5 °C 19.7 °C, 2021 11.7 °C, 2016
Maximum Feels-like 24.6 °C 18:27 24.0 °C 27.7 °C, 2015 22.1 °C, 2016
Mean Feels-like 19.6 °C 19.0 °C 22.6 °C, 2021 17.6 °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 10.6 °C (+1.5) 9.6 °C (+0.6) 13.7 °C (+4.6), 2015 3.6 °C (-5.5), 2012
Humidity Range 42% 38% 51%, 2009 20%, 2021
Pressure Range 4 hPa 4 hPa 13 hPa, 2013 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7 [47%]16 hrs (82%) [35%] 15.1 [100%], 2018 0 [0%], 2012
Wet Hours 02 hrs (61%) [2.8%] 7, 2012 0, 2009
Cloud Cover unknown
Events None
Comments -
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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