Daily Report for 17th February 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.9 °C (+7.1) 06:16 7.5 °C (+4.7) 10.9 °C (+8.1), 2023 -0.3 °C (-3.1), 2010
Maximum Temperature 12.8 °C (+4.7) 14:21 11.9 °C (+4.0) 14.3 °C (+6.2), 2023 7.0 °C (-1.2), 2016
Mean Temperature 11.1 °C (+5.9) 9.8 °C (+4.3) 12.3 °C, 2023 3.5 °C, 2010
Minimum Humidity 83% 00:13 79% 83%, 2024 47%, 2015
Maximum Humidity 95% 10:19 94% 98%, 2010 82%, 2020
Mean Humidity 89% 87% 89%, 2011 72%, 2016
Minimum Pressure 1027 hPa 00:01 1007 hPa 1027 hPa, 2024 989 hPa, 2010
Maximum Pressure 1032 hPa 11:35 1015 hPa 1041 hPa, 2015 992 hPa, 2010
Mean Pressure 1030 hPa 1011 hPa 1035 hPa, 2015 990 hPa, 2010
Mean Wind Speed 6.3 mph (+1.2) 6.7 mph (+1.6) 10.2 mph, 2020 1.8 mph, 2017
Maximum Wind Speed 16.1 mph 15:34 15.4 mph 19.8 mph, 2020 6.4 mph, 2017
Maximum Gust 24.2 mph 14:42 23.4 mph 44.5 mph, 2022 9.4 mph, 2017
Mean Wind Direction WSW
Rainfall 5.0 mm 41.9 mm (159%) 7.0 mm, 2016
Maximum Hourly Rain 1.7 mm 22:31 2.3 mm, 2016
Maximum 10-min Rain 0.5 mm 21:53 0.8 mm, 2022
Maximum Rain Rate 2.9 mm/h 21:53 30 mm/h, 2022
Minimum Dew Point 7.5 °C 05:55 5.7 °C 8.9 °C, 2023 -3.5 °C, 2015
Maximum Dew Point 11.3 °C 12:44 9.7 °C 11.3 °C, 2024 2.5 °C, 2015
Mean Dew Point 9.4 °C 7.8 °C 10.2 °C, 2023 -0.2 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.9 °C 06:13 8.0 °C 10.4 °C, 2023 0.4 °C, 2013
Day Maximum (09-21) 12.8 °C 13:53 11.8 °C 14.3 °C, 2023 7.0 °C, 2016
Max 10m Temp Rise 0.3 °C 12:45 0.4 °C 0.7 °C, 2019 0.2 °C, 2021
Max 1hr Temp Rise 0.9 °C 12:44 1.2 °C 2.7 °C, 2018 0.7 °C, 2021
Max 1hr Hum Rise 5% 07:41 4% 13%, 2013 3%, 2011
Max 10m Temp Fall 0.2 °C 17:00 0.4 °C 0.6 °C, 2022 0.2 °C, 2011
Max 1hr Temp Fall 0.7 °C 17:36 1.1 °C 2.3 °C, 2015 0.7 °C, 2009
Max 1hr Hum Fall 5% 13:15 6% 21%, 2013 4%, 2009
Max 10m Wind Speed 12.1 mph 14:47 11.4 mph 16.1 mph, 2020 4.1 mph, 2017
Minimum Feels-like 8.0 °C 05:54 5.5 °C 11.9 °C, 2023 -2.6 °C, 2015
Maximum Feels-like 14.7 °C 13:07 13.1 °C 16.1 °C, 2023 5.2 °C, 2016
Mean Feels-like 12.1 °C 9.7 °C 13.7 °C, 2023 1.8 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 0.4 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.9 °C (-2.5) 4.4 °C (-0.7) 9.9 °C (+4.5), 2019 2.9 °C (-2.5), 2024
Humidity Range 12% 15% 43%, 2013 10%, 2021
Pressure Range 5 hPa 9 hPa 18 hPa, 2015 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]29 hrs (63%) [20%] 9 [100%], 2015 0 [0%], 2021
Wet Hours 4
[Mean rain rate: 1.2 mm/h]
47 hrs (154%) [12%] 7, 2016 , 2009
Cloud Cover Overcast
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 7.4 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 17th February 2024.
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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