Daily Report for 25th June 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.5 °C (+0.7) 05:23 10.4 °C (-1.5) 17.8 °C (+5.0), 2020 8.3 °C (-4.5), 2013
Maximum Temperature 28.7 °C (+6.9) 14:00 20.4 °C (-0.5) 31.3 °C (+9.5), 2020 20.2 °C (-1.6), 2013
Mean Temperature 22.4 °C (+3.8) 15.8 °C (-1.0) 24.8 °C, 2020 15.0 °C, 2013
Minimum Humidity 48% 14:03 55% 78%, 2019 25%, 2018
Maximum Humidity 94% 06:17 90% 95%, 2011 69%, 2010
Mean Humidity 67% 73% 88%, 2019 51%, 2018
Minimum Pressure 1015 hPa 17:25 1013 hPa 1026 hPa, 2013 1005 hPa, 2022
Maximum Pressure 1019 hPa 00:09 1019 hPa 1030 hPa, 2013 1011 hPa, 2022
Mean Pressure 1017 hPa 1016 hPa 1029 hPa, 2013 1009 hPa, 2022
Mean Wind Speed 2.2 mph (-2.2) 4.4 mph (+0.0) 6.9 mph, 2022 1.9 mph, 2018
Maximum Wind Speed 9.9 mph 19:17 12.4 mph 18.0 mph, 2023 7.0 mph, 2018
Maximum Gust 12.7 mph 17:03 19.3 mph 27.6 mph, 2023 10.9 mph, 2013
Mean Wind Direction E
Rainfall 0.0 mm 11.8 mm (30%) 6.8 mm, 2019
Maximum Hourly Rain n/a 4.4, 2019
Maximum 10-min Rain n/a 1.4, 2016
Maximum Rain Rate n/a 36, 2016
Minimum Dew Point 12.1 °C 05:18 8.1 °C 15.0 °C, 2019 3.6 °C, 2013
Maximum Dew Point 18.0 °C 18:17 13.1 °C 20.2 °C, 2019 8.7 °C, 2013
Mean Dew Point 15.6 °C 10.7 °C 17.5 °C, 2019 5.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.5 °C 05:23 10.6 °C 18.0 °C, 2019 8.3 °C, 2013
Day Maximum (09-21) 28.7 °C 15:22 20.4 °C 31.3 °C, 2020 20.2 °C, 2013
Max 10m Temp Rise 0.9 °C 07:22 0.7 °C 0.9 °C, 2023 0.4 °C, 2011
Max 1hr Temp Rise 4.3 °C 07:22 2.7 °C 4.3 °C, 2024 1.4 °C, 2011
Max 1hr Hum Rise 8% 01:03 11% 21%, 2016 5%, 2011
Max 10m Temp Fall 0.6 °C 00:15 0.7 °C 1.1 °C, 2016 0.4 °C, 2014
Max 1hr Temp Fall 2.7 °C 01:03 2.1 °C 3.1 °C, 2016 1.3 °C, 2019
Max 1hr Hum Fall 22% 07:31 12% 22%, 2024 6%, 2010
Max 10m Wind Speed 7.5 mph 19:24 8.9 mph 14.1 mph, 2023 5.0 mph, 2010
Minimum Feels-like 15.8 °C 05:18 10.5 °C 21.5 °C, 2020 7.2 °C, 2013
Maximum Feels-like 34.2 °C 16:42 22.7 °C 36.9 °C, 2023 20.2 °C, 2013
Mean Feels-like 26.8 °C 17.5 °C 28.8 °C, 2020 15.0 °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 15.2 °C (+6.1) 10.0 °C (+1.0) 16.7 °C (+7.6), 2018 6.7 °C (-2.4), 2019
Humidity Range 46% 35% 61%, 2018 17%, 2019
Pressure Range 4 hPa 6 hPa 9 hPa, 2019 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12 [79%]167 hrs (103%) [44%] 15.2 [100%], 2018 0.4 [3%], 2019
Wet Hours 016 hrs (52%) [2.7%] 6, 2019 0, 2009
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 20.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 25th June 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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Webcam Summary of Cloud Conditions

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