Daily Report for 27th June 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.2 °C (+2.3) 23:57 10.8 °C (-1.2) 18.2 °C (+5.3), 2011 10.0 °C (-2.9), 2013
Maximum Temperature 24.2 °C (+2.2) 16:41 20.9 °C (-0.1) 31.9 °C (+9.9), 2011 19.2 °C (-2.8), 2022
Mean Temperature 20.7 °C (+2.2) 16.2 °C (-0.7) 25.4 °C, 2011 15.0 °C, 2013
Minimum Humidity 48% 17:15 54% 79%, 2021 29%, 2010
Maximum Humidity 82% 08:38 90% 94%, 2009 79%, 2015
Mean Humidity 67% 73% 87%, 2021 55%, 2010
Minimum Pressure 1009 hPa 06:40 1013 hPa 1028 hPa, 2019 1002 hPa, 2017
Maximum Pressure 1014 hPa 23:55 1019 hPa 1031 hPa, 2019 1009 hPa, 2020
Mean Pressure 1010 hPa 1016 hPa 1030 hPa, 2019 1006 hPa, 2020
Mean Wind Speed 6.9 mph (+2.5) 4.4 mph (+0.0) 9.3 mph, 2020 1.5 mph, 2009
Maximum Wind Speed 16.0 mph 18:02 12.5 mph 21.1 mph, 2020 8.7 mph, 2010
Maximum Gust 26.5 mph 18:02 19.5 mph 34.6 mph, 2020 11.5 mph, 2017
Mean Wind Direction WNW
Rainfall 0.0 mm 11.8 mm (28%) 35.8 mm, 2009
Maximum Hourly Rain n/a 33.3, 2009
Maximum 10-min Rain n/a 8, 2009
Maximum Rain Rate n/a 96, 2009
Minimum Dew Point 9.3 °C 23:37 8.3 °C 14.1 °C, 2012 5.9 °C, 2013
Maximum Dew Point 17.1 °C 00:24 13.5 °C 18.2 °C, 2011 10.9 °C, 2013
Mean Dew Point 14.3 °C 11.0 °C 15.7 °C, 2012 8.5 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 18.6 °C * 05:33 11.1 °C 18.6 °C, 2024 10.0 °C, 2013
Day Maximum (09-21) 24.2 °C 16:41 20.9 °C 31.9 °C, 2011 19.2 °C, 2022
Max 10m Temp Rise 0.6 °C 09:52 0.7 °C 1.0 °C, 2009 0.2 °C, 2021
Max 1hr Temp Rise 2.8 °C 10:36 2.7 °C 3.5 °C, 2009 1.0 °C, 2021
Max 1hr Hum Rise 9% 21:16 11% 33%, 2009 5%, 2012
Max 10m Temp Fall 0.6 °C 19:45 0.7 °C 2.0 °C, 2009 0.4 °C, 2012
Max 1hr Temp Fall 2.1 °C 20:32 2.1 °C 6.5 °C, 2009 1.0 °C, 2023
Max 1hr Hum Fall 13% 10:41 12% 19%, 2020 3%, 2021
Max 10m Wind Speed 11.4 mph 22:15 8.9 mph 16.1 mph, 2020 6.1 mph, 2017
Minimum Feels-like 16.2 °C 23:56 11.0 °C 22.5 °C, 2011 10.0 °C, 2013
Maximum Feels-like 28.3 °C 00:02 23.4 °C 36.1 °C, 2011 20.6 °C, 2013
Mean Feels-like 24.3 °C 18.1 °C 29.7 °C, 2011 15.6 °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 9.0 °C (-0.0) 10.1 °C (+1.1) 17.9 °C (+8.8), 2010 5.0 °C (-4.0), 2017
Humidity Range 34% 36% 57%, 2010 14%, 2021
Pressure Range 5 hPa 6 hPa 9 hPa, 2012 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [53%]186 hrs (107%) [46%] 14.5 [96%], 2010 0 [0%], 2017
Wet Hours 016 hrs (48%) [2.5%] 10, 2017 0, 2010
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 27th 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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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