Daily Report for 10th May 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 14.2 °C (+6.0) 08:36 9.9 °C (+2.1) 14.8 °C (+6.6), 2016 4.9 °C (-3.3), 2019
Maximum Temperature 19.8 °C (+2.7) 16:44 18.6 °C (+1.9) 21.4 °C (+4.3), 2011 12.8 °C (-4.3), 2010
Mean Temperature 16.3 °C (+4.3) 13.9 °C (+2.0) 16.3 °C, 2022 8.6 °C, 2010
Minimum Humidity 52% 16:08 56% 83%, 2012 33%, 2011
Maximum Humidity 90% 11:51 90% 97%, 2012 78%, 2017
Mean Humidity 72% 75% 92%, 2012 55%, 2011
Minimum Pressure 1014 hPa 23:59 1022 hPa 1023 hPa, 2011 997 hPa, 2021
Maximum Pressure 1019 hPa 00:04 1026 hPa 1025 hPa, 2011 1008 hPa, 2021
Mean Pressure 1016 hPa 1024 hPa 1024 hPa, 2011 1002 hPa, 2021
Mean Wind Speed 6.4 mph (+1.7) 3.0 mph (-1.7) 9.0 mph, 2014 2.1 mph, 2017
Maximum Wind Speed 15.7 mph 15:44 11.0 mph 22.5 mph, 2021 8.2 mph, 2017
Maximum Gust 24.0 mph 01:12 16.7 mph 36.9 mph, 2020 11.5 mph, 2017
Mean Wind Direction WSW
Rainfall 0.5 mm 4.8 mm (32%) 9.8 mm, 2012
Maximum Hourly Rain 0.5 mm 11:24 4.9 mm, 2012
Maximum 10-min Rain 0.3 mm 11:24 2.6 mm, 2012
Maximum Rain Rate 0.9 mm/h 11:24 24 mm/h, 2014
Minimum Dew Point 9.3 °C 06:06 7.1 °C 12.6 °C, 2012 -0.6 °C, 2010
Maximum Dew Point 13.1 °C 11:53 11.5 °C 14.9 °C, 2012 4.1 °C, 2010
Mean Dew Point 11.1 °C 9.4 °C 14.1 °C, 2012 2.4 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 14.2 °C 08:27 10.0 °C 14.8 °C, 2016 4.9 °C, 2019
Day Maximum (09-21) 19.8 °C 16:44 18.6 °C 21.4 °C, 2011 12.8 °C, 2010
Max 10m Temp Rise 0.8 °C 14:02 0.6 °C 1.0 °C, 2011 0.2 °C, 2012
Max 1hr Temp Rise 2.3 °C 14:24 2.1 °C 5.0 °C, 2011 0.6 °C, 2016
Max 1hr Hum Rise 11% 20:10 10% 26%, 2014 4%, 2016
Max 10m Temp Fall 0.4 °C 20:11 0.5 °C 0.9 °C, 2014 0.2 °C, 2016
Max 1hr Temp Fall 1.5 °C 20:54 1.9 °C 2.9 °C, 2014 0.6 °C, 2016
Max 1hr Hum Fall 19% 14:04 11% 29%, 2014 1%, 2016
Max 10m Wind Speed 11.8 mph 15:52 8.3 mph 17.9 mph, 2021 5.9 mph, 2017
Minimum Feels-like 15.8 °C 06:17 9.8 °C 17.6 °C, 2016 1.0 °C, 2020
Maximum Feels-like 21.3 °C 16:42 20.2 °C 21.4 °C, 2011 12.8 °C, 2010
Mean Feels-like 18.2 °C 15.0 °C 19.2 °C, 2016 7.3 °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 5.6 °C (-3.3) 8.7 °C (-0.3) 14.5 °C (+5.6), 2009 1.9 °C (-7.0), 2016
Humidity Range 38% 33% 53%, 2018 13%, 2016
Pressure Range 5 hPa 4 hPa 14 hPa, 2014 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.5 [18%]44 hrs (75%) [32%] 13 [94%], 2017 0 [0%], 2012
Wet Hours 1.5
[Mean rain rate: 0.3 mm/h]
7.5 hrs (58%) [3.1%] 9, 2016 0, 2009
Cloud Cover am: Overcast
pm: Mostly Sunny transitioned to Overcast
Events None
Comments some rn
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