Daily Report for 25th May 2022

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.6 °C (-0.5) 05:00 10.5 °C (+1.8) 15.6 °C (+5.5), 2012 4.9 °C (-5.2), 2013
Maximum Temperature 18.6 °C (-0.1) 17:38 19.7 °C (+2.1) 25.9 °C (+7.2), 2017 12.2 °C (-6.5), 2016
Mean Temperature 13.9 °C (-0.3) 15.0 °C (+1.9) 20.1 °C, 2017 10.0 °C, 2013
Minimum Humidity 66% 18:36 54% 73%, 2018 27%, 2011
Maximum Humidity 86% 04:55 90% 97%, 2013 72%, 2011
Mean Humidity 78% 74% 82%, 2018 46%, 2011
Minimum Pressure 1013 hPa 00:10 1017 hPa 1034 hPa, 2020 1010 hPa, 2009
Maximum Pressure 1019 hPa 23:55 1022 hPa 1037 hPa, 2020 1015 hPa, 2010
Mean Pressure 1014 hPa 1019 hPa 1035 hPa, 2020 1012 hPa, 2010
Mean Wind Speed 7.1 mph (+2.4) 3.7 mph (-1.0) 7.1 mph, 2022 1.7 mph, 2018
Maximum Wind Speed 16.5 mph 10:15 12.3 mph 16.5 mph, 2022 8.6 mph, 2017
Maximum Gust 26.2 mph 01:12 19.1 mph 27.9 mph, 2012 12.8 mph, 2015
Mean Wind Direction WSW
Rainfall 0.2 mm 23.6 mm (64%) 0.2 mm, 2022
Maximum Hourly Rain 0.2 mm 0.2 mm, 2022
Maximum 10-min Rain 0.2 mm 0.2 mm, 2022
Maximum Rain Rate n/a n/a
Minimum Dew Point 7.2 °C 03:50 7.6 °C 11.1 °C, 2018 -0.4 °C, 2011
Maximum Dew Point 13.5 °C 16:52 12.5 °C 15.7 °C, 2017 6.6 °C, 2011
Mean Dew Point 10.0 °C 10.1 °C 12.7 °C, 2018 3.0 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.6 °C 05:02 10.7 °C 15.6 °C, 2012 4.9 °C, 2013
Day Maximum (09-21) 18.6 °C 17:38 19.7 °C 25.9 °C, 2017 12.2 °C, 2016
Max 10m Temp Rise 0.6 °C 16:37 0.6 °C 1.1 °C, 2011 0.4 °C, 2010
Max 1hr Temp Rise 2.4 °C 17:13 2.4 °C 5.3 °C, 2011 1.3 °C, 2016
Max 1hr Hum Rise 9% 11:18 11% 17%, 2020 4%, 2015
Max 10m Temp Fall 0.5 °C 11:03 0.6 °C 0.7 °C, 2013 0.2 °C, 2016
Max 1hr Temp Fall 1.1 °C 21:54 1.9 °C 3.3 °C, 2013 0.5 °C, 2016
Max 1hr Hum Fall 12% 17:25 12% 18%, 2014 5%, 2016
Max 10m Wind Speed 12.7 mph 10:16 9.3 mph 12.7 mph, 2022 6.4 mph, 2015
Minimum Feels-like 7.2 °C 05:48 10.7 °C 18.6 °C, 2012 0.8 °C, 2013
Maximum Feels-like 21.3 °C 17:38 21.6 °C 29.1 °C, 2017 12.3 °C, 2016
Mean Feels-like 15.0 °C 16.3 °C 22.5 °C, 2017 9.0 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.0 °C (+0.4) 9.2 °C (+0.4) 16.8 °C (+8.2), 2020 3.4 °C (-5.2), 2016
Humidity Range 20% 36% 57%, 2013 18%, 2018
Pressure Range 7 hPa 6 hPa 16 hPa, 2011 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [14%]129 hrs (85%) [37%] 14.3 [98%], 2017 0 [0%], 2016
Wet Hours 0.532 hrs (100%) [5.4%] 0.5, 2022 0, 2010
Cloud Cover unknown
Events None
Comments possible am rn
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 18.0 °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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose