Daily Report for 2nd May 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (+1.9) 06:05 9.8 °C (+2.6) 9.2 °C (+2.0), 2016 2.7 °C (-4.5), 2021
Maximum Temperature 16.7 °C (+0.5) 17:05 16.2 °C (-0.0) 19.5 °C (+3.3), 2009 9.3 °C (-6.9), 2010
Mean Temperature 12.6 °C (+1.2) 12.5 °C (+1.3) 13.4 °C, 2009 7.8 °C, 2010
Minimum Humidity 57% 17:02 54% 72%, 2010 26%, 2013
Maximum Humidity 89% 06:27 86% 98%, 2014 56%, 2013
Mean Humidity 76% 74% 88%, 2010 39%, 2013
Minimum Pressure 1021 hPa 17:39 1022 hPa 1025 hPa, 2009 1003 hPa, 2015
Maximum Pressure 1023 hPa 00:02 1025 hPa 1029 hPa, 2009 1012 hPa, 2015
Mean Pressure 1022 hPa 1023 hPa 1027 hPa, 2009 1007 hPa, 2018
Mean Wind Speed 0.6 mph (-4.1) 1.4 mph (-3.3) 10.4 mph, 2011 0.6 mph, 2022
Maximum Wind Speed 6.0 mph 23:07 8.3 mph 19.7 mph, 2011 6.0 mph, 2022
Maximum Gust 9.1 mph 23:07 11.9 mph 32.0 mph, 2011 9.1 mph, 2022
Mean Wind Direction NW
Rainfall 0.0 mm 0.2 mm (7%) 22.4 mm, 2010
Maximum Hourly Rain n/a 4.9, 2010
Maximum 10-min Rain n/a 2.4, 2019
Maximum Rain Rate n/a 30, 2010
Minimum Dew Point 7.0 °C 05:46 5.9 °C 7.0 °C, 2022 -5.4 °C, 2013
Maximum Dew Point 9.5 °C 20:42 9.2 °C 11.0 °C, 2016 0.8 °C, 2013
Mean Dew Point 8.3 °C 7.9 °C 8.6 °C, 2012 -2.6 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.1 °C 06:05 9.9 °C 10.2 °C, 2016 2.7 °C, 2021
Day Maximum (09-21) 16.7 °C 17:05 16.2 °C 19.5 °C, 2009 8.2 °C, 2010
Max 10m Temp Rise 0.4 °C 16:18 0.4 °C 1.0 °C, 2013 0.2 °C, 2010
Max 1hr Temp Rise 1.5 °C 14:41 1.6 °C 3.5 °C, 2009 0.7 °C, 2010
Max 1hr Hum Rise 7% 20:34 11% 18%, 2021 4%, 2010
Max 10m Temp Fall 0.3 °C 17:25 0.4 °C 2.4 °C, 2018 0.3 °C, 2010
Max 1hr Temp Fall 1.2 °C 18:20 1.5 °C 3.4 °C, 2020 0.9 °C, 2010
Max 1hr Hum Fall 7% 10:52 10% 19%, 2018 7%, 2022
Max 10m Wind Speed 4.4 mph 23:36 6.2 mph 14.3 mph, 2016 4.4 mph, 2022
Minimum Feels-like 9.2 °C 05:52 10.0 °C 9.2 °C, 2022 1.3 °C, 2021
Maximum Feels-like 17.4 °C 17:22 16.6 °C 17.6 °C, 2016 8.6 °C, 2010
Mean Feels-like 13.1 °C 12.8 °C 13.1 °C, 2022 6.8 °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 7.6 °C (-1.4) 6.4 °C (-2.6) 12.8 °C (+3.8), 2013 4.4 °C (-4.6), 2010
Humidity Range 32% 32% 53%, 2009 24%, 2010
Pressure Range 2 hPa 3 hPa 15 hPa, 2014 2 hPa, 2022
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [7%]1 hrs (9%) [3.7%] 13.4 [100%], 2013 0 [0%], 2010
Wet Hours 01 hrs (39%) [2.1%] 11, 2010 0, 2009
Cloud Cover Mostly Cloudy or Overcast
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 13.5 °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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