Daily Report for 24th June 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.9 °C (+4.3) 05:34 12.8 °C (+1.0) 17.4 °C (+4.8), 2017 8.9 °C (-3.7), 2021
Maximum Temperature 27.2 °C (+5.5) 15:25 24.7 °C (+3.9) 30.6 °C (+8.9), 2020 16.6 °C (-5.1), 2013
Mean Temperature 22.7 °C (+4.9) 18.6 °C (+2.4) 23.7 °C, 2020 13.2 °C, 2013
Minimum Humidity 56% 15:26 51% 63%, 2022 33%, 2009
Maximum Humidity 88% 05:45 87% 95%, 2012 68%, 2010
Mean Humidity 71% 70% 78%, 2021 53%, 2010
Minimum Pressure 1021 hPa 23:31 1018 hPa 1025 hPa, 2018 1004 hPa, 2022
Maximum Pressure 1026 hPa 09:24 1021 hPa 1027 hPa, 2018 1009 hPa, 2022
Mean Pressure 1024 hPa 1019 hPa 1026 hPa, 2018 1006 hPa, 2022
Mean Wind Speed 3.6 mph (-0.8) 5.0 mph (+0.6) 7.1 mph, 2022 2.0 mph, 2021
Maximum Wind Speed 10.4 mph 11:19 13.7 mph 20.6 mph, 2016 7.5 mph, 2024
Maximum Gust 13.8 mph 11:18 20.7 mph 29.0 mph, 2016 11.4 mph, 2021
Mean Wind Direction W
Rainfall 0.0 mm 21.4 mm (57%) 10.3 mm, 2012
Maximum Hourly Rain n/a 2.6, 2012
Maximum 10-min Rain n/a 1.7, 2012
Maximum Rain Rate n/a 50, 2012
Minimum Dew Point 14.7 °C 05:18 9.7 °C 15.0 °C, 2019 4.4 °C, 2013
Maximum Dew Point 19.1 °C 13:29 15.8 °C 19.1 °C, 2023 7.8 °C, 2013
Mean Dew Point 17.0 °C 12.7 °C 17.0 °C, 2023 5.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.9 °C 05:34 12.8 °C 17.4 °C, 2017 8.9 °C, 2021
Day Maximum (09-21) 27.2 °C 15:25 24.7 °C 30.6 °C, 2020 16.6 °C, 2013
Max 10m Temp Rise 0.8 °C 11:45 0.7 °C 1.1 °C, 2009 0.4 °C, 2013
Max 1hr Temp Rise 2.6 °C 11:17 2.5 °C 3.4 °C, 2009 1.1 °C, 2013
Max 1hr Hum Rise 4% 17:22 10% 25%, 2014 4%, 2023
Max 10m Temp Fall 0.4 °C 12:18 0.7 °C 1.4 °C, 2012 0.3 °C, 2010
Max 1hr Temp Fall 2.0 °C 21:36 2.2 °C 3.6 °C, 2014 1.1 °C, 2017
Max 1hr Hum Fall 9% 11:17 10% 19%, 2012 7%, 2013
Max 10m Wind Speed 7.2 mph 11:23 10.0 mph 15.8 mph, 2016 5.2 mph, 2024
Minimum Feels-like 20.7 °C 05:11 13.9 °C 21.3 °C, 2019 9.1 °C, 2021
Maximum Feels-like 33.7 °C 18:38 28.6 °C 35.0 °C, 2020 16.6 °C, 2013
Mean Feels-like 28.0 °C 21.4 °C 28.0 °C, 2023 13.3 °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 10.3 °C (+1.3) 11.9 °C (+3.0) 14.9 °C (+5.9), 2020 5.5 °C (-3.5), 2017
Humidity Range 32% 36% 52%, 2012 21%, 2017
Pressure Range 5 hPa 4 hPa 10 hPa, 2012 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [40%]223 hrs (144%) [62%] 15.2 [100%], 2020 0.2 [1%], 2017
Wet Hours 07 hrs (24%) [1.2%] 7, 2012 0, 2009
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 23.1 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 24th June 2023.
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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