Daily Report for 18th February 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (+6.3) 23:25 7.6 °C (+4.7) 9.4 °C (+6.6), 2023 -0.8 °C (-3.6), 2010
Maximum Temperature 14.9 °C (+6.7) 15:14 12.1 °C (+4.1) 14.9 °C (+6.7), 2024 4.8 °C (-3.4), 2010
Mean Temperature 11.7 °C (+6.5) 9.9 °C (+4.4) 11.7 °C, 2024 2.1 °C, 2010
Minimum Humidity 75% 15:19 79% 88%, 2010 51%, 2016
Maximum Humidity 97% 09:37 94% 98%, 2010 81%, 2015
Mean Humidity 90% 88% 96%, 2010 71%, 2015
Minimum Pressure 1022 hPa 07:42 1008 hPa 1031 hPa, 2015 986 hPa, 2010
Maximum Pressure 1032 hPa 23:39 1016 hPa 1042 hPa, 2015 992 hPa, 2010
Mean Pressure 1026 hPa 1012 hPa 1036 hPa, 2015 989 hPa, 2010
Mean Wind Speed 5.3 mph (+0.2) 6.6 mph (+1.5) 15.0 mph, 2022 1.7 mph, 2009
Maximum Wind Speed 13.4 mph 14:50 15.3 mph 44.1 mph, 2022 8.8 mph, 2017
Maximum Gust 24.2 mph 01:01 23.4 mph 63.9 mph, 2022 10.0 mph, 2009
Mean Wind Direction WNW
Rainfall 11.0 mm 52.9 mm (189%) 11.0 mm, 2024
Maximum Hourly Rain 3.6 mm 06:19 4.3 mm, 2014
Maximum 10-min Rain 0.9 mm 05:59 2.1 mm, 2014
Maximum Rain Rate 7 mm/h 05:53 60 mm/h, 2014
Minimum Dew Point 7.5 °C 23:22 5.8 °C 7.5 °C, 2024 -4.9 °C, 2016
Maximum Dew Point 12.2 °C 12:10 9.8 °C 12.2 °C, 2024 2.2 °C, 2015
Mean Dew Point 10.1 °C 7.9 °C 10.1 °C, 2024 -0.1 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 10.6 °C * 06:22 8.1 °C 10.7 °C, 2023 -0.8 °C, 2010
Day Maximum (09-21) 14.9 °C 15:14 12.0 °C 14.9 °C, 2024 4.8 °C, 2010
Max 10m Temp Rise 0.4 °C 13:55 0.4 °C 1.3 °C, 2009 0.2 °C, 2017
Max 1hr Temp Rise 0.9 °C 13:07 1.1 °C 3.7 °C, 2018 0.5 °C, 2019
Max 1hr Hum Rise 5% 15:45 4% 16%, 2022 2%, 2010
Max 10m Temp Fall 0.5 °C 15:37 0.4 °C 1.7 °C, 2012 0.2 °C, 2010
Max 1hr Temp Fall 1.1 °C 18:48 1.1 °C 3.6 °C, 2012 0.7 °C, 2010
Max 1hr Hum Fall 12% 14:26 6% 13%, 2016 1%, 2010
Max 10m Wind Speed 10.9 mph 14:50 11.4 mph 29.5 mph, 2022 5.7 mph, 2010
Minimum Feels-like 7.5 °C 23:19 5.6 °C 7.5 °C, 2024 -3.6 °C, 2010
Maximum Feels-like 16.7 °C 14:09 13.3 °C 16.7 °C, 2024 4.8 °C, 2010
Mean Feels-like 13.0 °C 9.8 °C 13.0 °C, 2024 1.1 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 8 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.8 °C (+0.4) 4.5 °C (-0.6) 8.4 °C (+3.0), 2018 3.3 °C (-2.1), 2009
Humidity Range 22% 15% 41%, 2016 8%, 2019
Pressure Range 10 hPa 9 hPa 24 hPa, 2022 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [22%]31 hrs (63%) [20%] 9 [99%], 2015 0 [0%], 2019
Wet Hours 9
[Mean rain rate: 1.2 mm/h]
56 hrs (174%) [13%] 9, 2024 , 2009
Cloud Cover unknown
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 18th 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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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