Daily Report for 5th November 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.8 °C (-4.7) 06:27 5.3 °C (-1.3) 13.7 °C (+7.2), 2015 0.8 °C (-5.7), 2021
Maximum Temperature 9.2 °C (-2.5) 15:12 12.7 °C (+0.8) 16.8 °C (+5.1), 2010 8.5 °C (-3.2), 2012
Mean Temperature 4.8 °C (-3.6) 9.2 °C (-0.3) 15.0 °C, 2010 4.8 °C, 2020
Minimum Humidity 81% 15:03 72% 90%, 2011 60%, 2016
Maximum Humidity 97% 09:44 93% 98%, 2011 79%, 2016
Mean Humidity 92% 85% 94%, 2011 72%, 2016
Minimum Pressure 1036 hPa 23:49 1015 hPa 1036 hPa, 2020 967 hPa, 2023
Maximum Pressure 1042 hPa 09:31 1028 hPa 1042 hPa, 2020 994 hPa, 2023
Mean Pressure 1039 hPa 1021 hPa 1039 hPa, 2020 982 hPa, 2023
Mean Wind Speed 0.2 mph (-4.4) 4.3 mph (-0.3) 7.7 mph, 2016 0.2 mph, 2020
Maximum Wind Speed 3.0 mph 11:24 10.8 mph 20.8 mph, 2016 3.0 mph, 2020
Maximum Gust 6.0 mph 11:25 22.3 mph 35.5 mph, 2016 6.0 mph, 2020
Mean Wind Direction NW
Rainfall 0.0 mm 4.0 mm (36%) 8.5 mm, 2013
Maximum Hourly Rain n/a 3.7, 2013
Maximum 10-min Rain n/a 1.1, 2010
Maximum Rain Rate n/a 20, 2010
Minimum Dew Point 0.9 °C 06:27 3.2 °C 12.4 °C, 2015 -2.2 °C, 2016
Maximum Dew Point 6.7 °C 13:17 10.0 °C 14.6 °C, 2010 4.5 °C, 2016
Mean Dew Point 3.7 °C 6.7 °C 13.2 °C, 2015 1.0 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.8 °C 06:28 7.3 °C 15.2 °C, 2010 0.8 °C, 2021
Day Maximum (09-21) 9.2 °C 15:13 12.7 °C 16.8 °C, 2010 8.5 °C, 2012
Max 10m Temp Rise 0.5 °C 11:35 0.5 °C 0.6 °C, 2009 0.2 °C, 2010
Max 1hr Temp Rise 1.7 °C 11:35 1.6 °C 2.0 °C, 2017 0.6 °C, 2010
Max 1hr Hum Rise 4% 17:34 7% 9%, 2010 2%, 2015
Max 10m Temp Fall 0.4 °C 16:23 0.7 °C 1.2 °C, 2010 0.1 °C, 2022
Max 1hr Temp Fall 1.7 °C 17:12 1.9 °C 4.5 °C, 2010 0.1 °C, 2022
Max 1hr Hum Fall 6% 13:51 8% 19%, 2013 1%, 2022
Max 10m Wind Speed 0.0 mph 11:25 4.8 mph 16.2 mph, 2016 0.0 mph, 2020
Minimum Feels-like 1.8 °C 06:25 4.6 °C 16.2 °C, 2015 -2.3 °C, 2016
Maximum Feels-like 9.2 °C 14:41 14.2 °C 19.9 °C, 2010 6.7 °C, 2016
Mean Feels-like 4.8 °C 10.0 °C 17.7 °C, 2010 2.4 °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 7.4 °C (+2.2) 7.3 °C (+2.0) 8.6 °C (+3.4), 2021 1.8 °C (-3.4), 2015
Humidity Range 16% 21% 32%, 2013 4%, 2015
Pressure Range 5 hPa 13 hPa 27 hPa, 2023 3 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [60%]20 hrs (132%) [47%] 7 [84%], 2021 0 [0%], 2015
Wet Hours 05.5 hrs (52%) [4.6%] 6, 2015 0, 2012
Cloud Cover am: Overcast transitioned to Partly Cloudy
pm: Mostly Sunny
Events Dense Fog
Comments v dense fog til 10
Extra Comments
Issues wind sensor not reporting properly - v low speeds
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 10.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 5th 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

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose