Daily Report for 26th February 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.7 °C (+5.5) 23:46 5.2 °C (+2.3) 8.7 °C (+5.5), 2017 -2.8 °C (-6.0), 2018
Maximum Temperature 12.2 °C (+3.1) 12:42 9.6 °C (+1.3) 18.1 °C (+9.0), 2019 0.8 °C (-8.3), 2018
Mean Temperature 10.4 °C (+4.3) 7.3 °C (+1.8) 10.4 °C, 2017 -0.8 °C, 2018
Minimum Humidity 65% 13:18 68% 89%, 2013 43%, 2019
Maximum Humidity 86% 07:01 85% 98%, 2010 79%, 2016
Mean Humidity 80% 78% 95%, 2013 66%, 2016
Minimum Pressure 1000 hPa 23:54 1011 hPa 1035 hPa, 2021 979 hPa, 2010
Maximum Pressure 1008 hPa 04:44 1018 hPa 1041 hPa, 2021 999 hPa, 2010
Mean Pressure 1004 hPa 1015 hPa 1038 hPa, 2021 989 hPa, 2010
Mean Wind Speed 9.6 mph (+4.5) 5.3 mph (+0.2) 10.1 mph, 2024 1.3 mph, 2021
Maximum Wind Speed 20.0 mph 14:07 12.6 mph 23.0 mph, 2010 8.3 mph, 2019
Maximum Gust 32.5 mph 13:09 19.6 mph 34.7 mph, 2010 12.1 mph, 2012
Mean Wind Direction SW
Rainfall 2.5 mm 23.8 mm (57%) 5.7 mm, 2015
Maximum Hourly Rain 2.5 mm 21:04 3.2 mm, 2025
Maximum 10-min Rain 0.6 mm 21:04 1.2 mm, 2025
Maximum Rain Rate 10 mm/h 21:04 10 mm/h, 2017
Minimum Dew Point 5.4 °C 13:30 1.5 °C 5.4 °C, 2017 -7.5 °C, 2018
Maximum Dew Point 8.2 °C 09:21 5.8 °C 10.5 °C, 2015 -3.5 °C, 2018
Mean Dew Point 7.1 °C 3.7 °C 7.1 °C, 2017 -5.4 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.0 °C * 21:15 5.6 °C 9.6 °C, 2015 -1.8 °C, 2018
Day Maximum (09-21) 12.2 °C 12:42 9.5 °C 18.1 °C, 2019 0.8 °C, 2018
Max 10m Temp Rise 0.3 °C 11:59 0.3 °C 1.2 °C, 2022 0.1 °C, 2013
Max 1hr Temp Rise 1.0 °C 11:59 1.1 °C 5.3 °C, 2022 0.3 °C, 2013
Max 1hr Hum Rise 7% 14:32 4% 21%, 2018 3%, 2013
Max 10m Temp Fall 0.4 °C 23:11 0.3 °C 1.5 °C, 2015 0.1 °C, 2013
Max 1hr Temp Fall 1.3 °C 23:37 1.0 °C 3.1 °C, 2015 0.3 °C, 2013
Max 1hr Hum Fall 12% 12:26 6% 19%, 2015 2%, 2013
Max 10m Wind Speed 16.0 mph 14:09 9.8 mph 17.0 mph, 2024 5.9 mph, 2012
Minimum Feels-like 5.7 °C 23:52 2.3 °C 5.7 °C, 2017 -9.4 °C, 2018
Maximum Feels-like 12.2 °C 12:26 9.7 °C 18.1 °C, 2019 -2.0 °C, 2018
Mean Feels-like 10.0 °C 6.0 °C 10.0 °C, 2017 -6.2 °C, 2018
Air-frost Hrs 0 hrs 0 hrs 17 hrs, 2018 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.5 °C (-2.4) 4.4 °C (-0.9) 16.2 °C (+10.3), 2019 2.1 °C (-3.8), 2013
Humidity Range 21% 16% 48%, 2010 9%, 2013
Pressure Range 8 hPa 7 hPa 24 hPa, 2024 3 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.3 [3%]37 hrs (52%) [16%] 9.6 [100%], 2019 0 [0%], 2013
Wet Hours 1
[Mean rain rate: 2.5 mm/h]		61 hrs (126%) [9.8%] 6, 2011 , 2009
Cloud Cover Mostly Cloudy
Events None
Comments 20- Showers
Extra Comments
Issues suspect rain gauge - may have combined a few tips into one at 21
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 February 2017.
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

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose