Daily Report for 11th November 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.4 °C (-1.6) 23:55 4.7 °C (-1.7) 13.2 °C (+7.2), 2015 1.3 °C (-4.7), 2013
Maximum Temperature 8.9 °C (-2.0) 13:27 10.8 °C (-0.8) 16.0 °C (+5.1), 2022 8.8 °C (-2.1), 2017
Mean Temperature 7.0 °C (-1.8) 8.0 °C (-1.2) 14.3 °C, 2022 4.9 °C, 2023
Minimum Humidity 70% 13:55 78% 94%, 2009 62%, 2016
Maximum Humidity 95% 06:04 96% 98%, 2009 80%, 2016
Mean Humidity 83% 88% 97%, 2009 75%, 2016
Minimum Pressure 1000 hPa 06:26 991 hPa 1031 hPa, 2024 981 hPa, 2010
Maximum Pressure 1010 hPa 00:00 1004 hPa 1038 hPa, 2024 1000 hPa, 2014
Mean Pressure 1003 hPa 997 hPa 1036 hPa, 2024 992 hPa, 2010
Mean Wind Speed 6.4 mph (+1.8) 4.2 mph (-0.4) 11.4 mph, 2010 1.9 mph, 2017
Maximum Wind Speed 16.0 mph 13:32 11.8 mph 25.5 mph, 2010 6.9 mph, 2017
Maximum Gust 24.2 mph 06:49 18.5 mph 36.3 mph, 2010 10.2 mph, 2012
Mean Wind Direction WSW
Rainfall 3.7 mm 31.2 mm (127%) 12.3 mm, 2017
Maximum Hourly Rain 2.0 mm 05:08 5.1 mm, 2017
Maximum 10-min Rain 0.4 mm 04:31 1.5 mm, 2017
Maximum Rain Rate 3.3 mm/h 04:43 30 mm/h, 2010
Minimum Dew Point 2.1 °C 23:52 3.3 °C 9.5 °C, 2015 -2.7 °C, 2010
Maximum Dew Point 7.0 °C 06:44 8.7 °C 13.0 °C, 2010 4.0 °C, 2016
Mean Dew Point 4.2 °C 6.2 °C 11.4 °C, 2022 1.9 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 4.1 °C * 21:27 5.4 °C 14.5 °C, 2022 1.2 °C, 2013
Day Maximum (09-21) 8.9 °C 13:09 10.6 °C 16.0 °C, 2022 8.8 °C, 2017
Max 10m Temp Rise 0.3 °C 01:29 0.4 °C 0.7 °C, 2009 0.1 °C, 2015
Max 1hr Temp Rise 1.4 °C 10:35 1.6 °C 2.1 °C, 2013 0.4 °C, 2015
Max 1hr Hum Rise 4% 17:52 6% 9%, 2010 2%, 2009
Max 10m Temp Fall 0.4 °C 07:03 0.4 °C 1.1 °C, 2010 0.1 °C, 2013
Max 1hr Temp Fall 1.3 °C 07:44 1.3 °C 2.8 °C, 2010 0.1 °C, 2013
Max 1hr Hum Fall 10% 07:14 7% 18%, 2010 2%, 2022
Max 10m Wind Speed 12.4 mph 13:41 8.7 mph 15.9 mph, 2010 4.9 mph, 2017
Minimum Feels-like 0.0 °C 23:00 1.8 °C 14.5 °C, 2015 -1.5 °C, 2010
Maximum Feels-like 7.8 °C 06:43 11.4 °C 18.5 °C, 2022 7.8 °C, 2019
Mean Feels-like 4.2 °C 7.2 °C 16.2 °C, 2022 3.4 °C, 2023
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.5 °C (-0.4) 6.0 °C (+0.9) 12.0 °C (+7.1), 2010 1.8 °C (-3.1), 2017
Humidity Range 25% 18% 31%, 2012 4%, 2009
Pressure Range 10 hPa 12 hPa 23 hPa, 2010 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4.4 [54%]32 hrs (97%) [34%] 7.8 [96%], 2012 0 [0%], 2011
Wet Hours 4
[Mean rain rate: 0.9 mm/h]		39 hrs (169%) [15%] 9, 2017 0, 2012
Cloud Cover Partly Cloudy with periods of Sunny
Events None
Comments o.night rn
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 6.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 11th November 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

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose