Daily Report for 1st July 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.0 °C (-1.2) 01:55 12.0 °C (-1.3) 19.5 °C (+6.3), 2015 10.3 °C (-2.9), 2011
Maximum Temperature 21.2 °C (-1.0) 16:21 21.2 °C (-1.1) 34.2 °C (+12.0), 2015 19.0 °C (-3.2), 2012
Mean Temperature 16.2 °C (-1.1) 16.2 °C (-1.2) 27.2 °C, 2015 15.7 °C, 2012
Minimum Humidity 53% 15:44 53% 64%, 2020 28%, 2015
Maximum Humidity 90% 02:10 90% 90%, 2021 65%, 2015
Mean Humidity 74% 74% 77%, 2020 44%, 2015
Minimum Pressure 1015 hPa 01:07 1015 hPa 1023 hPa, 2011 1005 hPa, 2020
Maximum Pressure 1021 hPa 23:59 1021 hPa 1027 hPa, 2011 1009 hPa, 2020
Mean Pressure 1018 hPa 1018 hPa 1025 hPa, 2011 1007 hPa, 2020
Mean Wind Speed 3.9 mph (-0.4) 3.9 mph (-0.4) 10.6 mph, 2016 1.4 mph, 2021
Maximum Wind Speed 11.3 mph 17:57 11.3 mph 20.5 mph, 2016 8.5 mph, 2011
Maximum Gust 19.4 mph 11:08 19.4 mph 35.5 mph, 2016 12.1 mph, 2011
Mean Wind Direction WSW
Rainfall 0.5 mm 0.5 mm (34%) 1.3 mm, 2020
Maximum Hourly Rain 0.3 mm 16:19 0.5 mm, 2016
Maximum 10-min Rain 0.3 mm 16:19 0.3 mm, 2020
Maximum Rain Rate n/a 0.4, 2016
Minimum Dew Point 10.2 °C 01:50 10.2 °C 12.2 °C, 2009 4.3 °C, 2011
Maximum Dew Point 13.5 °C 12:37 13.5 °C 17.1 °C, 2009 8.4 °C, 2011
Mean Dew Point 11.3 °C 11.3 °C 14.3 °C, 2009 5.8 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 12.0 °C 01:55 12.0 °C 19.5 °C, 2015 10.3 °C, 2011
Day Maximum (09-21) 21.2 °C 16:21 21.2 °C 34.2 °C, 2015 19.0 °C, 2012
Max 10m Temp Rise 0.6 °C 07:45 0.6 °C 1.0 °C, 2009 0.5 °C, 2011
Max 1hr Temp Rise 2.5 °C 08:15 2.5 °C 4.4 °C, 2009 1.5 °C, 2013
Max 1hr Hum Rise 14% 12:44 14% 14%, 2022 5%, 2010
Max 10m Temp Fall 0.8 °C 12:36 0.8 °C 0.8 °C, 2012 0.4 °C, 2010
Max 1hr Temp Fall 2.3 °C 12:56 2.3 °C 3.0 °C, 2021 1.2 °C, 2012
Max 1hr Hum Fall 12% 14:00 12% 16%, 2016 7%, 2010
Max 10m Wind Speed 8.7 mph 20:21 8.7 mph 16.6 mph, 2016 5.3 mph, 2011
Minimum Feels-like 13.4 °C 01:41 13.4 °C 21.9 °C, 2015 10.3 °C, 2011
Maximum Feels-like 23.4 °C 16:27 23.4 °C 37.3 °C, 2015 19.2 °C, 2012
Mean Feels-like 18.2 °C 18.2 °C 30.2 °C, 2015 16.1 °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 9.2 °C (+0.1) 9.2 °C (+0.1) 14.7 °C (+5.6), 2015 5.4 °C (-3.7), 2020
Humidity Range 37% 37% 49%, 2014 22%, 2020
Pressure Range 6 hPa 6 hPa 8 hPa, 2012 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [33%]5 hrs (77%) [33%] 12 [80%], 2018 2.3 [15%], 2016
Wet Hours 1
[Mean rain rate: 0.5 mm/h]
1 hrs (91%) [4.2%] 2, 2016 0, 2009
Cloud Cover unknown
Events None
Comments shs
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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