Daily Report for 23rd May 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.9 °C (+0.9) 23:57 10.5 °C (+1.8) 12.8 °C (+2.8), 2012 5.4 °C (-4.6), 2021
Maximum Temperature 18.5 °C (-0.1) 15:16 19.4 °C (+1.9) 29.1 °C (+10.5), 2010 11.0 °C (-7.6), 2013
Mean Temperature 14.4 °C (+0.4) 14.9 °C (+1.8) 19.4 °C, 2010 8.1 °C, 2013
Minimum Humidity 62% 18:24 64% 64%, 2018 33%, 2009
Maximum Humidity 94% 03:27 94% 94%, 2024 71%, 2014
Mean Humidity 79% 80% 79%, 2024 51%, 2019
Minimum Pressure 1011 hPa 00:13 1011 hPa 1026 hPa, 2023 1001 hPa, 2022
Maximum Pressure 1018 hPa 22:28 1016 hPa 1029 hPa, 2023 1008 hPa, 2014
Mean Pressure 1015 hPa 1013 hPa 1028 hPa, 2023 1004 hPa, 2022
Mean Wind Speed 6.3 mph (+1.6) 3.8 mph (-0.9) 10.8 mph, 2020 2.4 mph, 2010
Maximum Wind Speed 13.5 mph 10:04 11.1 mph 23.3 mph, 2020 6.4 mph, 2012
Maximum Gust 23.0 mph 07:12 17.2 mph 39.2 mph, 2020 8.7 mph, 2012
Mean Wind Direction WNW
Rainfall 0.0 mm 65.9 mm (193%) 4.6 mm, 2021
Maximum Hourly Rain n/a 2, 2015
Maximum 10-min Rain n/a 1, 2021
Maximum Rain Rate n/a 14.4, 2021
Minimum Dew Point 7.6 °C 23:50 8.6 °C 10.3 °C, 2012 -2.2 °C, 2013
Maximum Dew Point 12.0 °C 14:32 13.7 °C 16.8 °C, 2012 2.8 °C, 2013
Mean Dew Point 10.7 °C 11.3 °C 13.7 °C, 2012 0.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 12.3 °C * 04:43 10.6 °C 13.0 °C, 2015 5.4 °C, 2021
Day Maximum (09-21) 18.5 °C 15:16 19.4 °C 29.1 °C, 2010 11.0 °C, 2013
Max 10m Temp Rise 0.5 °C 12:00 0.8 °C 1.0 °C, 2013 0.5 °C, 2010
Max 1hr Temp Rise 1.9 °C 14:39 2.5 °C 2.9 °C, 2012 1.7 °C, 2014
Max 1hr Hum Rise 7% 20:01 8% 21%, 2013 6%, 2018
Max 10m Temp Fall 0.5 °C 15:30 0.5 °C 1.6 °C, 2020 0.4 °C, 2012
Max 1hr Temp Fall 1.7 °C 19:37 1.7 °C 3.9 °C, 2022 1.3 °C, 2021
Max 1hr Hum Fall 8% 07:41 10% 22%, 2009 6%, 2017
Max 10m Wind Speed 10.6 mph 08:12 8.3 mph 16.7 mph, 2021 5.0 mph, 2012
Minimum Feels-like 11.1 °C 23:57 10.8 °C 14.2 °C, 2012 2.2 °C, 2013
Maximum Feels-like 20.6 °C 15:16 22.3 °C 31.2 °C, 2010 11.0 °C, 2013
Mean Feels-like 16.1 °C 16.8 °C 22.2 °C, 2012 6.5 °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 7.6 °C (-1.0) 8.9 °C (+0.1) 18.5 °C (+9.9), 2010 4.9 °C (-3.7), 2014
Humidity Range 32% 30% 59%, 2010 19%, 2017
Pressure Range 7 hPa 5 hPa 11 hPa, 2016 1 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4 [28%]123 hrs (89%) [38%] 14.6 [101%], 2010 1 [7%], 2022
Wet Hours 048 hrs (162%) [8.7%] 5, 2021 0, 2009
Cloud Cover unknown
Events None
Comments data is awaiting quality control from site operator
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 17.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 23rd 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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose