Daily Report for 7th November 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.3 °C (+1.9) 23:58 6.1 °C (-0.5) 11.1 °C (+4.7), 2015 2.3 °C (-4.1), 2016
Maximum Temperature 14.1 °C (+2.5) 12:14 13.1 °C (+1.2) 16.8 °C (+5.2), 2015 8.1 °C (-3.5), 2016
Mean Temperature 12.1 °C (+2.2) 9.8 °C (+0.4) 15.1 °C, 2015 4.8 °C, 2010
Minimum Humidity 80% 00:40 76% 87%, 2024 59%, 2014
Maximum Humidity 93% 07:18 93% 97%, 2010 78%, 2016
Mean Humidity 86% 86% 93%, 2024 73%, 2016
Minimum Pressure 995 hPa 12:51 1005 hPa 1030 hPa, 2024 989 hPa, 2014
Maximum Pressure 1010 hPa 23:59 1016 hPa 1033 hPa, 2024 996 hPa, 2009
Mean Pressure 999 hPa 1010 hPa 1031 hPa, 2024 993 hPa, 2014
Mean Wind Speed 8.0 mph (+3.4) 4.1 mph (-0.5) 8.0 mph, 2018 0.8 mph, 2020
Maximum Wind Speed 19.4 mph 11:50 12.6 mph 21.0 mph, 2015 5.0 mph, 2020
Maximum Gust 33.4 mph 14:38 20.6 mph 33.4 mph, 2018 8.0 mph, 2020
Mean Wind Direction S
Rainfall 5.3 mm 16.5 mm (106%) 9.2 mm, 2019
Maximum Hourly Rain 1.8 mm 08:06 5.1 mm, 2019
Maximum 10-min Rain 0.7 mm 07:32 1.6 mm, 2015
Maximum Rain Rate 3.3 mm/h 05:23 18 mm/h, 2015
Minimum Dew Point 5.8 °C 23:54 4.3 °C 9.3 °C, 2015 -1.1 °C, 2016
Maximum Dew Point 11.0 °C 10:26 9.8 °C 15.0 °C, 2015 2.9 °C, 2016
Mean Dew Point 9.8 °C 7.5 °C 13.2 °C, 2015 1.1 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 11.3 °C * 06:09 6.8 °C 14.5 °C, 2015 2.7 °C, 2010
Day Maximum (09-21) 14.1 °C 12:14 13.1 °C 16.8 °C, 2015 8.1 °C, 2016
Max 10m Temp Rise 0.3 °C 10:15 0.4 °C 1.3 °C, 2009 0.2 °C, 2011
Max 1hr Temp Rise 1.1 °C 10:45 1.6 °C 3.1 °C, 2009 0.7 °C, 2024
Max 1hr Hum Rise 7% 05:05 6% 9%, 2017 2%, 2015
Max 10m Temp Fall 0.5 °C 22:14 0.4 °C 1.0 °C, 2013 0.2 °C, 2012
Max 1hr Temp Fall 1.7 °C 22:54 1.5 °C 2.5 °C, 2013 0.6 °C, 2024
Max 1hr Hum Fall 6% 11:06 6% 17%, 2009 4%, 2015
Max 10m Wind Speed 14.0 mph 11:51 8.9 mph 14.8 mph, 2015 0.0 mph, 2020
Minimum Feels-like 4.7 °C 23:59 3.7 °C 12.1 °C, 2015 -2.4 °C, 2016
Maximum Feels-like 15.8 °C 12:08 14.4 °C 20.8 °C, 2015 6.2 °C, 2016
Mean Feels-like 13.1 °C 9.9 °C 18.1 °C, 2015 1.8 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.8 °C (+0.6) 7.0 °C (+1.7) 8.5 °C (+3.3), 2020 2.4 °C (-2.8), 2024
Humidity Range 13% 18% 36%, 2014 6%, 2015
Pressure Range 15 hPa 10 hPa 18 hPa, 2010 4 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [12%]23 hrs (109%) [39%] 7 [84%], 2009 0 [0%], 2011
Wet Hours 4
[Mean rain rate: 1.3 mm/h]		15 hrs (102%) [8.9%] 7, 2015 0, 2010
Cloud Cover Mostly Cloudy or Partly Cloudy
Events None
Comments am Rain; pm brief Showers
Extra Comments rainbows 13-14
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 7th November 2018.
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