Daily Report for 25th June 2014

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.5 °C (-2.2) 05:01 12.1 °C (+0.2) 17.8 °C (+5.1), 2020 8.3 °C (-4.4), 2013
Maximum Temperature 20.4 °C (-1.4) 16:26 21.8 °C (+1.0) 31.3 °C (+9.5), 2020 20.2 °C (-1.6), 2013
Mean Temperature 16.2 °C (-1.8) 17.1 °C (+0.6) 24.8 °C, 2020 15.0 °C, 2013
Minimum Humidity 36% 16:52 43% 78%, 2019 25%, 2018
Maximum Humidity 86% 05:18 85% 95%, 2011 69%, 2010
Mean Humidity 57% 64% 88%, 2019 51%, 2018
Minimum Pressure 1015 hPa 18:44 1018 hPa 1026 hPa, 2013 1005 hPa, 2022
Maximum Pressure 1019 hPa 06:15 1022 hPa 1030 hPa, 2013 1011 hPa, 2022
Mean Pressure 1018 hPa 1020 hPa 1029 hPa, 2013 1009 hPa, 2022
Mean Wind Speed 3.2 mph (-1.2) 3.4 mph (-1.0) 6.9 mph, 2022 1.9 mph, 2018
Maximum Wind Speed 9.2 mph 00:15 11.0 mph 18.0 mph, 2023 7.0 mph, 2018
Maximum Gust 12.8 mph 00:59 15.8 mph 27.6 mph, 2023 10.9 mph, 2013
Mean Wind Direction NE
Rainfall 0.0 mm 21.4 mm (55%) 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 4.4 °C 17:05 6.6 °C 15.0 °C, 2019 3.6 °C, 2013
Maximum Dew Point 11.8 °C 00:05 12.8 °C 20.2 °C, 2019 8.7 °C, 2013
Mean Dew Point 7.1 °C 9.6 °C 17.5 °C, 2019 5.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.5 °C 05:01 12.4 °C 18.0 °C, 2019 8.3 °C, 2013
Day Maximum (09-21) 20.4 °C 16:26 21.8 °C 31.3 °C, 2020 20.2 °C, 2013
Max 10m Temp Rise 0.6 °C 13:17 0.7 °C 0.9 °C, 2023 0.4 °C, 2011
Max 1hr Temp Rise 2.2 °C 06:42 2.3 °C 3.9 °C, 2023 1.4 °C, 2011
Max 1hr Hum Rise 7% 22:12 11% 21%, 2016 5%, 2011
Max 10m Temp Fall 0.4 °C 19:00 0.6 °C 1.1 °C, 2016 0.4 °C, 2014
Max 1hr Temp Fall 1.7 °C 01:26 2.1 °C 3.1 °C, 2016 1.3 °C, 2019
Max 1hr Hum Fall 14% 07:22 13% 16%, 2009 6%, 2010
Max 10m Wind Speed 6.4 mph 00:16 7.8 mph 14.1 mph, 2023 5.0 mph, 2010
Minimum Feels-like 10.9 °C 04:55 12.7 °C 21.5 °C, 2020 7.2 °C, 2013
Maximum Feels-like 20.4 °C 16:25 23.2 °C 36.9 °C, 2023 20.2 °C, 2013
Mean Feels-like 16.5 °C 18.4 °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 9.9 °C (+0.8) 9.7 °C (+0.8) 16.7 °C (+7.7), 2018 6.7 °C (-2.4), 2019
Humidity Range 50% 42% 61%, 2018 17%, 2019
Pressure Range 4 hPa 5 hPa 9 hPa, 2019 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12 [79%]185 hrs (114%) [49%] 15.2 [100%], 2018 0.4 [3%], 2019
Wet Hours 016 hrs (51%) [2.6%] 6, 2019 0, 2009
Cloud Cover am: Sunny
pm: Partly Cloudy transitioned to Partly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 25th June 2014.
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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Wind rose