Daily Report for 5th February 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.9 °C (+2.9) 19:14 2.0 °C (-1.0) 11.3 °C (+8.3), 2011 0.3 °C (-2.7), 2012
Maximum Temperature 8.6 °C (+0.8) 10:45 5.8 °C (-2.1) 13.0 °C (+5.2), 2011 2.2 °C (-5.6), 2012
Mean Temperature 7.0 °C (+1.9) 3.9 °C (-1.5) 12.0 °C, 2011 1.0 °C, 2012
Minimum Humidity 86% 13:15 80% 89%, 2012 45%, 2013
Maximum Humidity 95% 02:37 94% 98%, 2015 83%, 2011
Mean Humidity 92% 88% 94%, 2012 68%, 2013
Minimum Pressure 1020 hPa 23:58 1007 hPa 1041 hPa, 2023 978 hPa, 2014
Maximum Pressure 1026 hPa 10:06 1018 hPa 1047 hPa, 2023 990 hPa, 2014
Mean Pressure 1024 hPa 1012 hPa 1045 hPa, 2023 983 hPa, 2014
Mean Wind Speed 4.7 mph (-0.4) 5.8 mph (+0.7) 11.9 mph, 2014 0.6 mph, 2012
Maximum Wind Speed 14.3 mph 18:47 15.1 mph 23.9 mph, 2014 6.8 mph, 2020
Maximum Gust 20.7 mph 13:17 24.4 mph 42.7 mph, 2014 9.2 mph, 2020
Mean Wind Direction SSW
Rainfall 1.8 mm 22.3 mm (278%) 9.0 mm, 2009
Maximum Hourly Rain 1.1 mm 23:53 2.8 mm, 2014
Maximum 10-min Rain 0.4 mm 23:53 0.7 mm, 2014
Maximum Rain Rate 1.9 mm/h 23:53 4.8 mm/h, 2021
Minimum Dew Point 4.6 °C 16:32 0.5 °C 7.4 °C, 2011 -5.8 °C, 2013
Maximum Dew Point 7.1 °C 23:56 4.0 °C 9.0 °C, 2016 0.4 °C, 2018
Mean Dew Point 5.8 °C 2.1 °C 7.9 °C, 2011 -1.3 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.3 °C * 02:03 1.9 °C 11.3 °C, 2011 -0.6 °C, 2012
Day Maximum (09-21) 8.6 °C 10:45 5.7 °C 13.0 °C, 2011 2.2 °C, 2012
Max 10m Temp Rise 0.3 °C 02:23 0.3 °C 0.8 °C, 2023 0.1 °C, 2011
Max 1hr Temp Rise 0.7 °C 10:45 1.0 °C 2.8 °C, 2022 0.4 °C, 2011
Max 1hr Hum Rise 3% 14:15 4% 16%, 2013 2%, 2012
Max 10m Temp Fall 0.3 °C 14:00 0.2 °C 1.2 °C, 2025 0.2 °C, 2011
Max 1hr Temp Fall 1.0 °C 14:43 0.7 °C 1.8 °C, 2013 0.3 °C, 2012
Max 1hr Hum Fall 4% 07:52 5% 23%, 2015 3%, 2009
Max 10m Wind Speed 9.9 mph 13:54 11.1 mph 18.6 mph, 2014 5.1 mph, 2020
Minimum Feels-like 1.1 °C 18:48 -3.7 °C 11.7 °C, 2011 -5.1 °C, 2018
Maximum Feels-like 7.6 °C 10:32 4.6 °C 13.5 °C, 2011 1.7 °C, 2018
Mean Feels-like 4.9 °C 0.6 °C 12.4 °C, 2011 -1.7 °C, 2015
Air-frost Hrs 0 hrs 2 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.7 °C (-2.1) 3.8 °C (-1.1) 7.9 °C (+3.1), 2025 1.7 °C (-3.1), 2011
Humidity Range 9% 14% 42%, 2015 7%, 2024
Pressure Range 6 hPa 11 hPa 17 hPa, 2017 3 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]12 hrs (88%) [28%] 8 [96%], 2020 0 [0%], 2009
Wet Hours 3
[Mean rain rate: 0.6 mm/h]		31 hrs (334%) [26%] 5, 2014 , 2009
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments late Rain
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath n/a
Notes
Detailed daily weather report for Hampstead nw3 in London on 5th February 2019.
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