Daily Report for 14th February 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.0 °C (+1.2) 07:47 1.4 °C (-1.5) 11.3 °C (+8.6), 2024 -1.5 °C (-4.2), 2009
Maximum Temperature 8.3 °C (+0.2) 13:35 5.6 °C (-2.3) 13.3 °C (+5.2), 2024 4.3 °C (-3.8), 2010
Mean Temperature 6.8 °C (+0.8) 3.6 °C (-1.9) 12.3 °C, 2024 2.2 °C, 2010
Minimum Humidity 86% 13:54 69% 91%, 2024 48%, 2009
Maximum Humidity 96% 09:24 90% 98%, 2013 78%, 2017
Mean Humidity 91% 80% 92%, 2024 68%, 2021
Minimum Pressure 996 hPa 00:00 1016 hPa 1030 hPa, 2019 975 hPa, 2014
Maximum Pressure 1008 hPa 23:17 1024 hPa 1034 hPa, 2019 1000 hPa, 2014
Mean Pressure 1002 hPa 1019 hPa 1032 hPa, 2019 989 hPa, 2014
Mean Wind Speed 4.0 mph (-1.1) 5.0 mph (-0.1) 10.6 mph, 2014 1.0 mph, 2023
Maximum Wind Speed 12.1 mph 00:00 12.4 mph 35.5 mph, 2014 6.0 mph, 2023
Maximum Gust 15.2 mph 00:58 17.3 mph 49.7 mph, 2014 9.2 mph, 2023
Mean Wind Direction E
Rainfall 2.2 mm 11.1 mm (49%) 8.5 mm, 2014
Maximum Hourly Rain 1.7 mm 01:37 4.6 mm, 2014
Maximum 10-min Rain 0.6 mm 00:57 1.5 mm, 2014
Maximum Rain Rate 18 mm/h 01:37 18 mm/h, 2014
Minimum Dew Point 3.0 °C 07:38 -2.1 °C 10.0 °C, 2024 -5.9 °C, 2016
Maximum Dew Point 6.6 °C 10:51 2.0 °C 11.9 °C, 2024 -1.1 °C, 2025
Mean Dew Point 5.5 °C 0.4 °C 11.1 °C, 2024 -2.6 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.0 °C 07:47 1.6 °C 11.3 °C, 2024 -1.5 °C, 2009
Day Maximum (09-21) 8.3 °C 13:35 5.6 °C 13.3 °C, 2024 4.3 °C, 2010
Max 10m Temp Rise 0.4 °C 08:56 0.3 °C 0.9 °C, 2019 0.2 °C, 2010
Max 1hr Temp Rise 1.7 °C 09:11 1.0 °C 3.2 °C, 2023 0.5 °C, 2024
Max 1hr Hum Rise 3% 07:12 6% 14%, 2021 2%, 2024
Max 10m Temp Fall 0.3 °C 06:12 0.3 °C 0.9 °C, 2022 0.1 °C, 2024
Max 1hr Temp Fall 1.0 °C 06:22 1.0 °C 3.0 °C, 2023 0.4 °C, 2017
Max 1hr Hum Fall 5% 12:13 8% 19%, 2014 2%, 2024
Max 10m Wind Speed 7.9 mph 01:00 9.2 mph 26.6 mph, 2014 5.0 mph, 2023
Minimum Feels-like 3.1 °C 08:08 -2.5 °C 12.6 °C, 2024 -5.3 °C, 2021
Maximum Feels-like 8.2 °C 14:12 4.6 °C 15.5 °C, 2024 2.3 °C, 2021
Mean Feels-like 5.2 °C 1.0 °C 14.1 °C, 2024 -1.8 °C, 2021
Air-frost Hrs 0 hrs 1.0 hrs 6 hrs, 2009 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.3 °C (-1.0) 4.1 °C (-0.9) 12.7 °C (+7.4), 2019 2.0 °C (-3.3), 2024
Humidity Range 10% 21% 48%, 2009 3%, 2024
Pressure Range 12 hPa 8 hPa 25 hPa, 2014 3 hPa, 2025
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]31 hrs (81%) [25%] 8.9 [100%], 2019 0 [0%], 2014
Wet Hours 3
[Mean rain rate: 0.7 mm/h]		19 hrs (74%) [5.7%] 8, 2018 , 2009
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments -02 Rain; odd day Shower
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 14th February 2015.
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