Daily Report for 4th November 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.3 °C (-5.3) 07:24 6.2 °C (-0.4) 15.0 °C (+8.4), 2010 1.3 °C (-5.3), 2012
Maximum Temperature 10.5 °C (-1.4) 13:44 13.5 °C (+1.5) 18.1 °C (+6.2), 2010 8.4 °C (-3.5), 2012
Mean Temperature 5.3 °C (-3.3) 10.3 °C (+0.6) 16.2 °C, 2010 4.7 °C, 2012
Minimum Humidity 68% 14:21 70% 90%, 2015 62%, 2013
Maximum Humidity 95% 08:41 92% 98%, 2012 81%, 2016
Mean Humidity 87% 83% 93%, 2023 77%, 2016
Minimum Pressure 1028 hPa 00:07 1010 hPa 1028 hPa, 2020 965 hPa, 2023
Maximum Pressure 1040 hPa 23:55 1025 hPa 1040 hPa, 2020 985 hPa, 2023
Mean Pressure 1034 hPa 1016 hPa 1034 hPa, 2020 971 hPa, 2023
Mean Wind Speed 0.8 mph (-3.8) 5.3 mph (+0.7) 8.9 mph, 2010 0.8 mph, 2020
Maximum Wind Speed 1.7 mph 01:06 12.7 mph 17.6 mph, 2010 1.7 mph, 2020
Maximum Gust 4.0 mph 00:57 26.3 mph 26.5 mph, 2023 4.0 mph, 2020
Mean Wind Direction W
Rainfall 0.0 mm 4.0 mm (45%) 17.3 mm, 2012
Maximum Hourly Rain n/a 5.5, 2012
Maximum 10-min Rain n/a 2, 2012
Maximum Rain Rate n/a 30, 2012
Minimum Dew Point 0.1 °C 07:18 3.8 °C 11.6 °C, 2010 -1.1 °C, 2012
Maximum Dew Point 6.0 °C 13:41 10.9 °C 13.4 °C, 2015 6.0 °C, 2020
Mean Dew Point 3.3 °C 7.5 °C 12.3 °C, 2010 3.3 °C, 2020
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.3 °C 07:24 8.7 °C 15.0 °C, 2010 1.3 °C, 2012
Day Maximum (09-21) 10.5 °C 13:44 13.5 °C 18.1 °C, 2010 8.4 °C, 2012
Max 10m Temp Rise 0.6 °C 10:44 0.5 °C 0.9 °C, 2009 0.2 °C, 2010
Max 1hr Temp Rise 2.3 °C 10:56 1.6 °C 2.3 °C, 2020 0.6 °C, 2017
Max 1hr Hum Rise 8% 16:14 8% 18%, 2009 1%, 2015
Max 10m Temp Fall 0.5 °C 16:51 0.8 °C 1.0 °C, 2009 0.2 °C, 2010
Max 1hr Temp Fall 2.4 °C 17:18 1.9 °C 2.8 °C, 2009 0.3 °C, 2015
Max 1hr Hum Fall 8% 10:47 8% 12%, 2014 2%, 2015
Max 10m Wind Speed 0.2 mph 01:06 6.0 mph 11.9 mph, 2012 0.2 mph, 2020
Minimum Feels-like 1.3 °C 07:16 5.3 °C 17.1 °C, 2010 0.0 °C, 2013
Maximum Feels-like 10.5 °C 13:43 15.5 °C 20.8 °C, 2010 8.6 °C, 2021
Mean Feels-like 5.3 °C 11.3 °C 18.6 °C, 2010 3.2 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.2 °C (+3.9) 7.3 °C (+2.0) 9.2 °C (+3.9), 2020 3.1 °C (-2.2), 2010
Humidity Range 27% 22% 36%, 2013 5%, 2015
Pressure Range 13 hPa 15 hPa 19 hPa, 2023 3 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [95%]15 hrs (123%) [44%] 8 [95%], 2020 0.1 [1%], 2015
Wet Hours 05.5 hrs (65%) [5.7%] 8, 2011 0, 2009
Cloud Cover Sunny
Events None
Comments -
Extra Comments
Issues wind sensor not reporting properly - v low speeds
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 10.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 4th November 2020.
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