Daily Report for 7th May 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.1 °C (+4.3) 23:49 9.9 °C (+2.4) 14.4 °C (+6.6), 2011 3.9 °C (-3.9), 2012
Maximum Temperature 18.9 °C (+2.1) 15:49 18.0 °C (+1.5) 27.8 °C (+11.0), 2018 12.8 °C (-4.0), 2010
Mean Temperature 14.8 °C (+3.2) 13.5 °C (+1.9) 19.0 °C, 2018 8.6 °C, 2010
Minimum Humidity 66% 15:41 58% 70%, 2009 28%, 2018
Maximum Humidity 92% 07:13 89% 93%, 2020 76%, 2016
Mean Humidity 82% 77% 82%, 2022 52%, 2013
Minimum Pressure 1025 hPa 03:17 1022 hPa 1025 hPa, 2022 1005 hPa, 2016
Maximum Pressure 1030 hPa 23:37 1026 hPa 1030 hPa, 2022 1008 hPa, 2016
Mean Pressure 1027 hPa 1024 hPa 1027 hPa, 2022 1006 hPa, 2016
Mean Wind Speed 3.0 mph (-1.7) 2.4 mph (-2.3) 7.8 mph, 2014 2.5 mph, 2016
Maximum Wind Speed 10.7 mph 21:00 9.7 mph 20.0 mph, 2015 10.0 mph, 2010
Maximum Gust 18.2 mph 01:12 14.6 mph 31.0 mph, 2015 13.5 mph, 2013
Mean Wind Direction NNE
Rainfall 1.2 mm 4.3 mm (41%) 2.0 mm, 2012
Maximum Hourly Rain 0.7 mm 01:15 1.2 mm, 2012
Maximum 10-min Rain 0.5 mm 00:56 0.6 mm, 2012
Maximum Rain Rate 1.8 mm/h 00:56 4.2 mm/h, 2012
Minimum Dew Point 10.0 °C 23:57 7.2 °C 10.0 °C, 2022 -0.3 °C, 2021
Maximum Dew Point 13.2 °C 16:28 11.3 °C 15.1 °C, 2011 3.6 °C, 2010
Mean Dew Point 11.7 °C 9.4 °C 11.7 °C, 2022 1.6 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 12.7 °C * 06:40 10.0 °C 14.4 °C, 2011 3.9 °C, 2012
Day Maximum (09-21) 18.9 °C 15:50 18.0 °C 27.8 °C, 2018 12.8 °C, 2010
Max 10m Temp Rise 0.8 °C 10:35 0.6 °C 1.0 °C, 2013 0.4 °C, 2009
Max 1hr Temp Rise 1.8 °C 08:07 1.9 °C 4.8 °C, 2018 1.2 °C, 2009
Max 1hr Hum Rise 9% 16:41 11% 15%, 2011 4%, 2020
Max 10m Temp Fall 0.7 °C 17:26 0.6 °C 0.8 °C, 2014 0.3 °C, 2010
Max 1hr Temp Fall 1.9 °C 16:48 2.1 °C 2.6 °C, 2018 0.9 °C, 2012
Max 1hr Hum Fall 11% 10:04 10% 24%, 2018 4%, 2009
Max 10m Wind Speed 8.8 mph 16:55 7.4 mph 17.6 mph, 2015 6.9 mph, 2013
Minimum Feels-like 13.4 °C 23:56 9.9 °C 15.7 °C, 2011 0.4 °C, 2021
Maximum Feels-like 21.5 °C 15:52 19.5 °C 29.6 °C, 2018 12.8 °C, 2010
Mean Feels-like 17.0 °C 14.5 °C 20.3 °C, 2011 7.4 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.8 °C (-2.1) 8.1 °C (-0.9) 18.7 °C (+9.8), 2018 6.1 °C (-2.8), 2009
Humidity Range 26% 31% 60%, 2018 12%, 2009
Pressure Range 5 hPa 4 hPa 14 hPa, 2019 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.5 [18%]22 hrs (53%) [23%] 13.8 [101%], 2018 0.7 [5%], 2009
Wet Hours 2
[Mean rain rate: 0.6 mm/h]
6 hrs (66%) [3.6%] 3, 2012 0, 2009
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events None
Comments shs
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 16.0 °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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Wind rose