Daily Report for 22nd May 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.9 °C (+3.0) 23:48 10.5 °C (+1.8) 14.2 °C (+4.3), 2020 8.2 °C (-1.7), 2009
Maximum Temperature 14.8 °C (-3.7) 16:50 19.5 °C (+2.0) 25.2 °C (+6.7), 2017 14.2 °C (-4.3), 2013
Mean Temperature 13.9 °C (-0.3) 15.0 °C (+1.9) 19.1 °C, 2020 10.7 °C, 2021
Minimum Humidity 91% 13:27 64% 91%, 2024 35%, 2011
Maximum Humidity 96% 08:09 94% 96%, 2024 75%, 2020
Mean Humidity 94% 80% 94%, 2024 54%, 2019
Minimum Pressure 1007 hPa 06:13 1011 hPa 1027 hPa, 2010 997 hPa, 2021
Maximum Pressure 1011 hPa 23:55 1016 hPa 1031 hPa, 2010 1003 hPa, 2014
Mean Pressure 1008 hPa 1013 hPa 1029 hPa, 2010 1001 hPa, 2014
Mean Wind Speed 5.3 mph (+0.6) 3.7 mph (-1.0) 9.1 mph, 2011 2.3 mph, 2016
Maximum Wind Speed 13.4 mph 13:24 11.0 mph 21.0 mph, 2011 9.4 mph, 2010
Maximum Gust 23.0 mph 13:17 16.9 mph 33.8 mph, 2011 13.6 mph, 2010
Mean Wind Direction WNW
Rainfall 13.9 mm 65.9 mm (202%) 13.9 mm, 2024
Maximum Hourly Rain 3.4 mm 06:35 3.4 mm, 2024
Maximum 10-min Rain 1.1 mm 04:44 1.7 mm, 2014
Maximum Rain Rate 66 mm/h 04:44 66 mm/h, 2024
Minimum Dew Point 11.6 °C 23:39 8.7 °C 11.6 °C, 2024 0.0 °C, 2013
Maximum Dew Point 13.8 °C 16:36 13.8 °C 15.5 °C, 2012 8.2 °C, 2009
Mean Dew Point 12.9 °C 11.4 °C 12.9 °C, 2024 5.4 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 13.1 °C * 06:20 10.5 °C 17.2 °C, 2020 8.2 °C, 2009
Day Maximum (09-21) 14.8 °C 16:50 19.5 °C 25.2 °C, 2017 14.2 °C, 2013
Max 10m Temp Rise 0.2 °C 13:07 0.8 °C 1.0 °C, 2012 0.2 °C, 2024
Max 1hr Temp Rise 0.6 °C 09:58 2.5 °C 3.9 °C, 2012 0.6 °C, 2024
Max 1hr Hum Rise 2% 14:29 8% 21%, 2014 2%, 2024
Max 10m Temp Fall 0.3 °C 21:33 0.5 °C 2.3 °C, 2014 0.3 °C, 2015
Max 1hr Temp Fall 0.7 °C 22:19 1.7 °C 4.4 °C, 2014 0.7 °C, 2024
Max 1hr Hum Fall 3% 13:24 11% 24%, 2022 3%, 2024
Max 10m Wind Speed 9.8 mph 13:31 8.2 mph 14.7 mph, 2020 6.2 mph, 2012
Minimum Feels-like 15.0 °C 23:36 10.7 °C 15.2 °C, 2020 5.3 °C, 2013
Maximum Feels-like 18.0 °C 16:36 22.4 °C 28.7 °C, 2012 14.2 °C, 2013
Mean Feels-like 16.6 °C 16.9 °C 20.2 °C, 2020 9.8 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 1.9 °C (-6.7) 9.0 °C (+0.2) 14.4 °C (+5.8), 2017 1.9 °C (-6.7), 2024
Humidity Range 5% 30% 58%, 2022 5%, 2024
Pressure Range 4 hPa 5 hPa 13 hPa, 2021 3 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours [0%]119 hrs (90%) [39%] 14.5 [100%], 2010 [0%], 2024
Wet Hours 36 hrs (127%) [6.8%] 7, 2021 , 2024
Cloud Cover not available
Events None
Comments
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) null
Notes
Detailed daily weather report for Hampstead nw3 in London on 22nd May 2024.
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 derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
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