Daily Report for 8th November 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (+2.8) 08:33 9.9 °C (+3.4) 11.3 °C (+5.0), 2022 -0.4 °C (-6.7), 2016
Maximum Temperature 10.8 °C (-0.6) 00:22 13.9 °C (+2.0) 16.0 °C (+4.6), 2015 5.5 °C (-5.9), 2016
Mean Temperature 10.1 °C (+1.1) 12.2 °C (+2.7) 13.3 °C, 2015 3.2 °C, 2016
Minimum Humidity 91% 14:40 79% 91%, 2011 60%, 2018
Maximum Humidity 97% 06:32 95% 98%, 2009 80%, 2016
Mean Humidity 95% 88% 95%, 2011 74%, 2016
Minimum Pressure 1013 hPa 19:19 1004 hPa 1024 hPa, 2024 966 hPa, 2010
Maximum Pressure 1016 hPa 05:57 1014 hPa 1030 hPa, 2024 992 hPa, 2010
Mean Pressure 1014 hPa 1009 hPa 1026 hPa, 2024 979 hPa, 2010
Mean Wind Speed 2.9 mph (-1.7) 4.5 mph (-0.1) 9.7 mph, 2022 0.7 mph, 2020
Maximum Wind Speed 12.5 mph 12.3 mph 24.2 mph, 2018 5.0 mph, 2020
Maximum Gust 21.3 mph 07:40 17.9 mph 34.6 mph, 2022 8.0 mph, 2020
Mean Wind Direction E
Rainfall 1.1 mm 22.5 mm (126%) 16.3 mm, 2014
Maximum Hourly Rain 0.5 mm 19:55 11.5 mm, 2014
Maximum 10-min Rain 0.3 mm 19:27 6.6 mm, 2014
Maximum Rain Rate 0.7 mm/h 19:55 90 mm/h, 2014
Minimum Dew Point 8.4 °C 08:45 8.3 °C 9.3 °C, 2022 -3.8 °C, 2016
Maximum Dew Point 10.2 °C 00:22 12.1 °C 14.1 °C, 2015 1.0 °C, 2016
Mean Dew Point 9.2 °C 10.2 °C 11.6 °C, 2015 -1.1 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.1 °C 08:32 10.6 °C 11.9 °C, 2022 -0.4 °C, 2016
Day Maximum (09-21) * 10.3 °C * 13:45 13.7 °C 16.0 °C, 2015 5.5 °C, 2016
Max 10m Temp Rise 0.1 °C 09:07 0.2 °C 0.8 °C, 2014 0.1 °C, 2011
Max 1hr Temp Rise 0.4 °C 10:00 0.9 °C 2.6 °C, 2013 0.2 °C, 2024
Max 1hr Hum Rise 2% 15:31 4% 10%, 2014 1%, 2015
Max 10m Temp Fall 0.3 °C 07:55 0.4 °C 0.9 °C, 2014 0.2 °C, 2016
Max 1hr Temp Fall 1.2 °C 08:32 1.6 °C 2.2 °C, 2022 0.4 °C, 2020
Max 1hr Hum Fall 4% 08:25 7% 9%, 2012 2%, 2015
Max 10m Wind Speed 7.5 mph 07:54 8.2 mph 15.4 mph, 2022 0.0 mph, 2020
Minimum Feels-like 6.9 °C 08:21 9.4 °C 12.4 °C, 2022 -5.5 °C, 2016
Maximum Feels-like 12.2 °C 00:00 15.9 °C 19.4 °C, 2015 5.5 °C, 2016
Mean Feels-like 10.8 °C 13.4 °C 15.4 °C, 2015 1.4 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 1 hrs, 2016 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 1.7 °C (-3.4) 3.9 °C (-1.4) 8.4 °C (+3.3), 2018 1.7 °C (-3.4), 2011
Humidity Range 6% 16% 32%, 2018 5%, 2015
Pressure Range 3 hPa 10 hPa 26 hPa, 2010 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]9.9 hrs (42%) [15%] 7 [85%], 2018 0 [0%], 2010
Wet Hours 5
[Mean rain rate: 0.2 mm/h]		18 hrs (104%) [9.1%] 5, 2011 0, 2012
Cloud Cover Overcast
Events None
Comments Drizzle spells throughout (particularly early and late)
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 8th November 2011.
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.
View monthly summary

Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose