Daily Report for 19th June 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.3 °C (+1.1) 05:59 11.7 °C (+0.0) 18.4 °C (+6.2), 2017 8.2 °C (-4.0), 2010
Maximum Temperature 19.4 °C (-1.9) 13:06 19.2 °C (-1.3) 31.9 °C (+10.6), 2017 14.3 °C (-7.0), 2010
Mean Temperature 16.2 °C (-0.4) 15.3 °C (-0.6) 25.7 °C, 2017 11.5 °C, 2010
Minimum Humidity 75% 12:49 57% 80%, 2021 33%, 2025
Maximum Humidity 93% 06:00 90% 94%, 2021 71%, 2015
Mean Humidity 88% 76% 90%, 2021 54%, 2017
Minimum Pressure 1007 hPa 05:28 1009 hPa 1025 hPa, 2025 1005 hPa, 2011
Maximum Pressure 1011 hPa 00:35 1015 hPa 1027 hPa, 2025 1011 hPa, 2019
Mean Pressure 1009 hPa 1012 hPa 1026 hPa, 2025 1009 hPa, 2019
Mean Wind Speed 1.3 mph (-3.1) 5.1 mph (+0.7) 6.7 mph, 2011 1.3 mph, 2019
Maximum Wind Speed 8.2 mph 17:21 14.2 mph 16.6 mph, 2020 7.4 mph, 2017
Maximum Gust 11.5 mph 17:25 22.6 mph 26.5 mph, 2020 10.5 mph, 2017
Mean Wind Direction WNW
Rainfall 5.5 mm 51.9 mm (174%) 5.5 mm, 2019
Maximum Hourly Rain 4.6 mm 16:14 4.6 mm, 2019
Maximum 10-min Rain 2.6 mm 15:57 2.6 mm, 2019
Maximum Rain Rate 26 mm/h 15:50 26 mm/h, 2019
Minimum Dew Point 12.0 °C 03:49 8.4 °C 14.0 °C, 2018 2.5 °C, 2010
Maximum Dew Point 16.0 °C 17:26 12.8 °C 17.5 °C, 2013 8.2 °C, 2010
Mean Dew Point 14.1 °C 10.7 °C 15.5 °C, 2018 5.5 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.3 °C 05:22 11.8 °C 18.4 °C, 2017 8.2 °C, 2010
Day Maximum (09-21) 19.4 °C 13:08 19.1 °C 31.9 °C, 2017 14.3 °C, 2010
Max 10m Temp Rise 0.4 °C 11:07 0.7 °C 0.8 °C, 2009 0.4 °C, 2019
Max 1hr Temp Rise 2.0 °C 12:48 2.0 °C 3.5 °C, 2014 1.2 °C, 2021
Max 1hr Hum Rise 11% 16:12 11% 14%, 2022 4%, 2010
Max 10m Temp Fall 0.7 °C 15:55 0.6 °C 0.8 °C, 2024 0.3 °C, 2021
Max 1hr Temp Fall 1.8 °C 16:12 1.8 °C 2.7 °C, 2025 0.9 °C, 2021
Max 1hr Hum Fall 8% 12:53 11% 14%, 2025 5%, 2021
Max 10m Wind Speed 6.2 mph 17:30 10.2 mph 13.4 mph, 2020 4.2 mph, 2017
Minimum Feels-like 15.6 °C 04:30 12.2 °C 22.1 °C, 2017 6.0 °C, 2022
Maximum Feels-like 23.7 °C 12:48 21.2 °C 36.0 °C, 2017 14.3 °C, 2010
Mean Feels-like 19.6 °C 16.9 °C 29.7 °C, 2017 11.3 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.1 °C (-3.0) 7.6 °C (-1.3) 16.5 °C (+7.5), 2025 4.3 °C (-4.7), 2021
Humidity Range 18% 33% 55%, 2025 14%, 2021
Pressure Range 4 hPa 7 hPa 9 hPa, 2011 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.2 [1%]77 hrs (63%) [27%] 14.7 [97%], 2025 0 [0%], 2021
Wet Hours 4
[Mean rain rate: 1.4 mm/h]		64 hrs (273%) [14%] 4, 2019 0, 2009
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments pm rn
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 16.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 19th June 2019.
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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