Daily Report for 29th October 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.8 °C (+0.6) 02:13 8.5 °C (-0.0) 12.6 °C (+5.4), 2024 2.2 °C (-5.0), 2018
Maximum Temperature 14.4 °C (+1.5) 23:56 14.0 °C (-0.7) 21.3 °C (+8.4), 2022 8.5 °C (-4.4), 2018
Mean Temperature 11.5 °C (+1.0) 11.2 °C (-0.4) 16.1 °C, 2022 5.0 °C, 2018
Minimum Humidity 85% 01:14 75% 91%, 2014 52%, 2013
Maximum Humidity 94% 12:31 93% 98%, 2009 80%, 2016
Mean Humidity 89% 87% 95%, 2014 76%, 2017
Minimum Pressure 1009 hPa 00:00 1005 hPa 1034 hPa, 2016 983 hPa, 2023
Maximum Pressure 1015 hPa 08:03 1012 hPa 1037 hPa, 2016 995 hPa, 2023
Mean Pressure 1013 hPa 1009 hPa 1036 hPa, 2016 990 hPa, 2023
Mean Wind Speed 4.3 mph (+0.2) 3.7 mph (-0.4) 7.9 mph, 2010 0.2 mph, 2016
Maximum Wind Speed 13.5 mph 22:23 13.3 mph 18.7 mph, 2021 4.4 mph, 2016
Maximum Gust 25.3 mph 14:52 21.9 mph 29.7 mph, 2021 4.8 mph, 2016
Mean Wind Direction SW
Rainfall 3.6 mm 157.9 mm (260%) 7.2 mm, 2023
Maximum Hourly Rain 1.6 mm 11:13 3.0 mm, 2023
Maximum 10-min Rain 0.5 mm 11:01 1.4 mm, 2012
Maximum Rain Rate 18 mm/h 11:01 24 mm/h, 2015
Minimum Dew Point 5.6 °C 01:56 6.7 °C 11.8 °C, 2024 0.4 °C, 2018
Maximum Dew Point 12.3 °C 15:31 11.0 °C 17.0 °C, 2022 3.1 °C, 2018
Mean Dew Point 9.8 °C 9.0 °C 14.0 °C, 2022 1.7 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.8 °C 02:20 8.9 °C 13.0 °C, 2016 2.2 °C, 2018
Day Maximum (09-21) * 14.3 °C * 20:30 14.0 °C 21.3 °C, 2022 8.5 °C, 2018
Max 10m Temp Rise 0.3 °C 08:42 0.4 °C 0.7 °C, 2009 0.1 °C, 2014
Max 1hr Temp Rise 1.1 °C 09:19 1.5 °C 3.1 °C, 2022 0.3 °C, 2014
Max 1hr Hum Rise 3% 10:47 6% 8%, 2009 2%, 2014
Max 10m Temp Fall 0.2 °C 01:18 0.5 °C 0.7 °C, 2009 0.2 °C, 2020
Max 1hr Temp Fall 0.3 °C 01:39 1.2 °C 2.2 °C, 2016 0.3 °C, 2020
Max 1hr Hum Fall 2% 14:37 7% 15%, 2009 2%, 2014
Max 10m Wind Speed 4.4 mph 13:40 8.6 mph 14.3 mph, 2021 1.9 mph, 2016
Minimum Feels-like 5.6 °C 01:20 6.9 °C 14.9 °C, 2024 -2.9 °C, 2018
Maximum Feels-like 16.8 °C 23:56 15.6 °C 26.5 °C, 2022 8.1 °C, 2018
Mean Feels-like 12.8 °C 11.8 °C 19.5 °C, 2022 1.9 °C, 2018
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.6 °C (+0.9) 5.5 °C (-0.7) 10.0 °C (+4.3), 2022 2.6 °C (-3.1), 2010
Humidity Range 9% 19% 39%, 2013 5%, 2014
Pressure Range 5 hPa 7 hPa 18 hPa, 2018 2 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]69 hrs (62%) [25%] 7.7 [88%], 2018 0 [0%], 2014
Wet Hours 4
[Mean rain rate: 0.9 mm/h]		125 hrs (272%) [18%] 7, 2014 0, 2011
Cloud Cover Overcast
Events None
Comments Rain
Extra Comments
Issues wind sensor not reporting properly - v low speeds
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 9.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 29th October 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