Daily Report for 22nd July 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 14.7 °C (-0.0) 05:04 13.3 °C (-0.9) 17.5 °C (+2.8), 2016 10.5 °C (-4.2), 2011
Maximum Temperature 24.2 °C (+0.9) 16:01 21.5 °C (-1.5) 32.7 °C (+9.4), 2013 18.2 °C (-5.1), 2023
Mean Temperature 19.1 °C (+0.4) 17.5 °C (-1.2) 24.5 °C, 2013 15.4 °C, 2017
Minimum Humidity 68% 00:04 63% 70%, 2023 31%, 2013
Maximum Humidity 88% 08:42 92% 95%, 2023 71%, 2020
Mean Humidity 79% 78% 85%, 2023 55%, 2020
Minimum Pressure 1015 hPa 17:54 1011 hPa 1024 hPa, 2012 1001 hPa, 2009
Maximum Pressure 1017 hPa 22:27 1017 hPa 1029 hPa, 2012 1004 hPa, 2009
Mean Pressure 1016 hPa 1014 hPa 1026 hPa, 2012 1002 hPa, 2009
Mean Wind Speed 4.5 mph (+0.2) 3.1 mph (-1.2) 7.4 mph, 2023 0.9 mph, 2016
Maximum Wind Speed 12.3 mph 13:31 10.3 mph 16.9 mph, 2023 6.5 mph, 2021
Maximum Gust 17.6 mph 10:28 15.8 mph 28.8 mph, 2023 10.3 mph, 2021
Mean Wind Direction SW
Rainfall 0.0 mm 110.6 mm (339%) 9.8 mm, 2023
Maximum Hourly Rain n/a 3.4, 2017
Maximum 10-min Rain n/a 1.6, 2010
Maximum Rain Rate n/a 30, 2010
Minimum Dew Point 11.0 °C 01:32 10.7 °C 13.8 °C, 2019 6.3 °C, 2011
Maximum Dew Point 18.4 °C 15:57 15.8 °C 19.7 °C, 2019 11.4 °C, 2012
Mean Dew Point 15.3 °C 13.4 °C 17.0 °C, 2019 9.4 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 14.7 °C 05:05 13.3 °C 17.5 °C, 2016 10.5 °C, 2011
Day Maximum (09-21) 24.2 °C 16:02 21.5 °C 32.7 °C, 2013 18.2 °C, 2023
Max 10m Temp Rise 0.7 °C 12:26 0.6 °C 1.0 °C, 2012 0.5 °C, 2009
Max 1hr Temp Rise 1.7 °C 13:06 2.3 °C 3.5 °C, 2012 1.5 °C, 2009
Max 1hr Hum Rise 7% 05:00 10% 18%, 2015 5%, 2009
Max 10m Temp Fall 0.5 °C 17:17 0.6 °C 1.0 °C, 2015 0.3 °C, 2012
Max 1hr Temp Fall 1.5 °C 20:28 2.0 °C 3.4 °C, 2015 1.2 °C, 2009
Max 1hr Hum Fall 7% 13:07 10% 13%, 2012 6%, 2019
Max 10m Wind Speed 10.3 mph 12:13 7.6 mph 13.7 mph, 2023 4.1 mph, 2016
Minimum Feels-like 16.8 °C 04:23 15.2 °C 21.0 °C, 2021 11.4 °C, 2011
Maximum Feels-like 30.5 °C 15:57 25.5 °C 36.9 °C, 2013 21.1 °C, 2023
Mean Feels-like 23.4 °C 20.6 °C 28.4 °C, 2013 16.7 °C, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.5 °C (+0.9) 8.3 °C (-0.6) 16.0 °C (+7.5), 2013 4.4 °C (-4.2), 2023
Humidity Range 20% 29% 56%, 2013 20%, 2024
Pressure Range 2 hPa 6 hPa 10 hPa, 2023 2 hPa, 2024
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [41%]95 hrs (68%) [29%] 13 [90%], 2021 0 [0%], 2023
Wet Hours 051 hrs (210%) [9.6%] 10, 2023 0, 2009
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 21.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 22nd July 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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