Daily Report for 26th August 2010

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.8 °C (+0.3) 00:04 13.7 °C (-0.4) 17.1 °C (+3.6), 2016 8.6 °C (-4.9), 2018
Maximum Temperature 19.6 °C (-2.2) 14:10 20.9 °C (-1.7) 32.0 °C (+10.2), 2019 16.2 °C (-5.6), 2014
Mean Temperature 17.1 °C (-0.9) 17.3 °C (-1.1) 24.0 °C, 2019 13.4 °C, 2018
Minimum Humidity 87% 14:35 56% 87%, 2010 29%, 2016
Maximum Humidity 98% 04:47 89% 98%, 2010 79%, 2020
Mean Humidity 95% 75% 95%, 2010 61%, 2019
Minimum Pressure 1003 hPa 12:37 1011 hPa 1022 hPa, 2021 1001 hPa, 2014
Maximum Pressure 1006 hPa 04:29 1016 hPa 1024 hPa, 2021 1006 hPa, 2010
Mean Pressure 1004 hPa 1013 hPa 1023 hPa, 2021 1004 hPa, 2015
Mean Wind Speed 4.1 mph (+0.1) 5.1 mph (+1.1) 8.2 mph, 2020 0.6 mph, 2022
Maximum Wind Speed 11.8 mph 12.8 mph 22.2 mph, 2020 6.5 mph, 2017
Maximum Gust 15.4 mph 07:19 18.9 mph 38.0 mph, 2020 8.4 mph, 2017
Mean Wind Direction S
Rainfall 6.8 mm 91.6 mm (202%) 13.6 mm, 2018
Maximum Hourly Rain 1.4 mm 16:59 7.7 mm, 2023
Maximum 10-min Rain 0.5 mm 16:28 4.8 mm, 2023
Maximum Rain Rate 2.7 mm/h 01:49 72 mm/h, 2023
Minimum Dew Point 13.3 °C 00:04 10.1 °C 13.4 °C, 2019 5.8 °C, 2012
Maximum Dew Point 18.0 °C 13:30 14.8 °C 18.6 °C, 2016 12.9 °C, 2012
Mean Dew Point 16.3 °C 12.5 °C 16.3 °C, 2010 10.0 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.8 °C 13.9 °C 17.1 °C, 2016 8.6 °C, 2018
Day Maximum (09-21) 19.6 °C 20.9 °C 32.0 °C, 2019 16.2 °C, 2014
Max 10m Temp Rise 0.3 °C 03:00 0.6 °C 0.9 °C, 2018 0.2 °C, 2014
Max 1hr Temp Rise 1.4 °C 03:39 2.1 °C 3.5 °C, 2019 0.6 °C, 2014
Max 1hr Hum Rise 4% 15:38 9% 20%, 2009 2%, 2014
Max 10m Temp Fall 0.2 °C 14:27 0.5 °C 1.5 °C, 2023 0.2 °C, 2010
Max 1hr Temp Fall 1.0 °C 21:47 1.7 °C 3.9 °C, 2016 0.7 °C, 2021
Max 1hr Hum Fall 5% 14:18 11% 21%, 2022 5%, 2010
Max 10m Wind Speed 9.3 mph 11:31 9.2 mph 17.5 mph, 2020 4.5 mph, 2022
Minimum Feels-like 16.8 °C 00:00 15.6 °C 18.4 °C, 2019 8.6 °C, 2018
Maximum Feels-like 25.4 °C 13:45 23.7 °C 36.7 °C, 2019 20.2 °C, 2014
Mean Feels-like 22.0 °C 19.9 °C 28.0 °C, 2019 15.6 °C, 2018
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.8 °C (-2.5) 7.1 °C (-1.3) 16.6 °C (+8.3), 2019 3.5 °C (-4.8), 2021
Humidity Range 11% 33% 59%, 2016 11%, 2010
Pressure Range 3 hPa 5 hPa 18 hPa, 2020 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.2 [2%]84 hrs (53%) [24%] 12.8 [101%], 2019 0 [0%], 2014
Wet Hours 8
[Mean rain rate: 0.8 mm/h]		49 hrs (154%) [7.9%] 8, 2010 0, 2012
Cloud Cover Overcast
Events None
Comments 01-07 Light Showers; 15-00 Light-Moderate broken Rain/Drizzle
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 26th August 2010.
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