Daily Report for 24th June 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.7 °C (-0.9) 05:35 12.6 °C (+0.8) 17.4 °C (+4.8), 2017 8.9 °C (-3.7), 2021
Maximum Temperature 25.3 °C (+3.6) 17:07 22.5 °C (+1.7) 30.6 °C (+8.9), 2020 16.6 °C (-5.1), 2013
Mean Temperature 19.2 °C (+1.3) 17.4 °C (+1.3) 23.7 °C, 2020 13.2 °C, 2013
Minimum Humidity 33% 15:16 50% 63%, 2022 33%, 2009
Maximum Humidity 70% 23:53 87% 95%, 2012 68%, 2010
Mean Humidity 55% 70% 78%, 2021 53%, 2010
Minimum Pressure 1025 hPa 18:28 1017 hPa 1025 hPa, 2018 1004 hPa, 2022
Maximum Pressure 1027 hPa 00:14 1021 hPa 1027 hPa, 2018 1009 hPa, 2022
Mean Pressure 1026 hPa 1019 hPa 1026 hPa, 2018 1006 hPa, 2022
Mean Wind Speed 2.5 mph (-1.9) 4.4 mph (-0.0) 7.1 mph, 2022 2.0 mph, 2021
Maximum Wind Speed 9.1 mph 19:37 11.4 mph 20.6 mph, 2016 8.2 mph, 2021
Maximum Gust 12.7 mph 16:40 17.7 mph 29.0 mph, 2016 11.4 mph, 2021
Mean Wind Direction ENE
Rainfall 0.0 mm 0.8 mm (2%) 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 5.9 °C 05:06 8.6 °C 15.0 °C, 2019 4.4 °C, 2013
Maximum Dew Point 12.3 °C 21:41 13.7 °C 19.1 °C, 2023 7.8 °C, 2013
Mean Dew Point 9.5 °C 11.3 °C 17.0 °C, 2023 5.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.7 °C 05:36 12.7 °C 17.4 °C, 2017 8.9 °C, 2021
Day Maximum (09-21) 25.3 °C 17:08 22.5 °C 30.6 °C, 2020 16.6 °C, 2013
Max 10m Temp Rise 0.7 °C 06:03 0.7 °C 1.1 °C, 2009 0.4 °C, 2013
Max 1hr Temp Rise 2.4 °C 06:41 2.4 °C 3.4 °C, 2009 1.1 °C, 2013
Max 1hr Hum Rise 8% 21:14 9% 25%, 2014 4%, 2023
Max 10m Temp Fall 0.4 °C 17:19 0.5 °C 1.4 °C, 2012 0.3 °C, 2010
Max 1hr Temp Fall 2.0 °C 22:34 1.8 °C 3.6 °C, 2014 1.1 °C, 2017
Max 1hr Hum Fall 14% 10:35 12% 19%, 2012 7%, 2013
Max 10m Wind Speed 8.1 mph 19:14 8.7 mph 15.8 mph, 2016 6.0 mph, 2010
Minimum Feels-like 11.7 °C 05:28 13.6 °C 21.3 °C, 2019 9.1 °C, 2021
Maximum Feels-like 26.8 °C 19:00 25.1 °C 35.0 °C, 2020 16.6 °C, 2013
Mean Feels-like 20.3 °C 19.4 °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 13.6 °C (+4.6) 9.8 °C (+0.9) 14.9 °C (+5.9), 2020 5.5 °C (-3.5), 2017
Humidity Range 37% 37% 52%, 2012 21%, 2017
Pressure Range 2 hPa 4 hPa 10 hPa, 2012 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 15 [99%]158 hrs (102%) [44%] 15.2 [100%], 2020 0.2 [1%], 2017
Wet Hours 03.5 hrs (12%) [0.6%] 7, 2012 0, 2009
Cloud Cover am: Sunny or Hazy
pm: Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 24th June 2018.
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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