Daily Report for 26th June 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.5 °C (+0.7) 04:55 12.7 °C (+0.8) 16.7 °C (+3.9), 2020 9.4 °C (-3.4), 2013
Maximum Temperature 27.4 °C (+5.6) 14:32 22.9 °C (+2.1) 30.5 °C (+8.7), 2020 20.5 °C (-1.3), 2016
Mean Temperature 20.9 °C (+3.1) 17.7 °C (+1.4) 23.7 °C, 2020 15.8 °C, 2016
Minimum Humidity 38% 13:50 49% 74%, 2019 34%, 2015
Maximum Humidity 90% 05:15 87% 94%, 2019 68%, 2017
Mean Humidity 60% 69% 85%, 2019 52%, 2017
Minimum Pressure 1026 hPa 04:47 1018 hPa 1028 hPa, 2013 1008 hPa, 2020
Maximum Pressure 1028 hPa 21:55 1022 hPa 1031 hPa, 2013 1014 hPa, 2020
Mean Pressure 1027 hPa 1020 hPa 1030 hPa, 2013 1010 hPa, 2020
Mean Wind Speed 3.7 mph (-0.7) 4.3 mph (-0.1) 8.1 mph, 2016 2.2 mph, 2017
Maximum Wind Speed 12.3 mph 17:20 11.3 mph 18.9 mph, 2016 9.0 mph, 2013
Maximum Gust 18.4 mph 16:48 17.5 mph 27.4 mph, 2016 13.6 mph, 2017
Mean Wind Direction E
Rainfall 0.0 mm 0.8 mm (2%) 2.4 mm, 2014
Maximum Hourly Rain n/a 2, 2014
Maximum 10-min Rain n/a 0.7, 2014
Maximum Rain Rate n/a 5.4, 2014
Minimum Dew Point 9.6 °C 23:50 8.5 °C 13.3 °C, 2024 4.8 °C, 2014
Maximum Dew Point 14.0 °C 14:17 13.8 °C 19.5 °C, 2024 10.3 °C, 2017
Mean Dew Point 12.2 °C 11.3 °C 16.4 °C, 2020 7.2 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.5 °C 04:55 12.8 °C 19.1 °C, 2020 9.4 °C, 2013
Day Maximum (09-21) 27.4 °C 14:32 22.9 °C 30.5 °C, 2020 20.5 °C, 2016
Max 10m Temp Rise 0.8 °C 06:11 0.7 °C 0.9 °C, 2017 0.5 °C, 2010
Max 1hr Temp Rise 3.2 °C 06:40 2.5 °C 4.0 °C, 2020 1.9 °C, 2019
Max 1hr Hum Rise 12% 22:38 10% 15%, 2020 3%, 2019
Max 10m Temp Fall 0.5 °C 19:25 0.5 °C 0.9 °C, 2020 0.4 °C, 2016
Max 1hr Temp Fall 2.2 °C 21:16 1.9 °C 3.5 °C, 2020 1.1 °C, 2023
Max 1hr Hum Fall 13% 06:48 12% 19%, 2020 6%, 2019
Max 10m Wind Speed 9.6 mph 17:27 8.6 mph 14.4 mph, 2016 6.2 mph, 2014
Minimum Feels-like 15.5 °C 04:52 13.7 °C 19.5 °C, 2020 8.8 °C, 2013
Maximum Feels-like 30.7 °C 14:17 25.5 °C 37.0 °C, 2020 20.7 °C, 2014
Mean Feels-like 23.2 °C 19.8 °C 28.6 °C, 2020 16.4 °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 13.9 °C (+4.8) 10.2 °C (+1.3) 14.1 °C (+5.0), 2024 7.1 °C (-2.0), 2019
Humidity Range 52% 38% 52%, 2018 20%, 2019
Pressure Range 2 hPa 3 hPa 7 hPa, 2023 1 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 15.2 [100%]188 hrs (112%) [48%] 15.2 [100%], 2018 1 [7%], 2016
Wet Hours 03.5 hrs (11%) [0.6%] 2, 2014 0, 2009
Cloud Cover 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 26th 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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