Daily Report for 13th October 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.0 °C (+0.0) 23:57 13.4 °C (+4.0) 19.1 °C (+10.1), 2018 5.1 °C (-3.9), 2012
Maximum Temperature 19.7 °C (+4.4) 13:40 20.5 °C (+4.6) 23.8 °C (+8.5), 2018 10.7 °C (-4.6), 2020
Mean Temperature 16.2 °C (+2.2) 16.7 °C (+4.3) 21.1 °C, 2018 7.8 °C, 2024
Minimum Humidity 77% 15:53 72% 96%, 2014 53%, 2009
Maximum Humidity 97% 02:34 93% 98%, 2013 79%, 2018
Mean Humidity 90% 84% 96%, 2014 69%, 2018
Minimum Pressure 999 hPa 16:42 1016 hPa 1030 hPa, 2009 995 hPa, 2014
Maximum Pressure 1010 hPa 00:00 1022 hPa 1032 hPa, 2009 1003 hPa, 2014
Mean Pressure 1003 hPa 1019 hPa 1031 hPa, 2009 998 hPa, 2014
Mean Wind Speed 8.5 mph (+4.4) 5.3 mph (+1.2) 9.0 mph, 2018 0.8 mph, 2021
Maximum Wind Speed 21.5 mph 15:54 14.0 mph 21.5 mph, 2023 6.6 mph, 2009
Maximum Gust 35.7 mph 07:44 21.2 mph 35.7 mph, 2018 9.5 mph, 2009
Mean Wind Direction W
Rainfall 14.1 mm 30.2 mm (111%) 40.7 mm, 2014
Maximum Hourly Rain 3.9 mm 03:07 6.4 mm, 2014
Maximum 10-min Rain 1.4 mm 18:52 2.3 mm, 2014
Maximum Rain Rate 30 mm/h 18:47 54 mm/h, 2014
Minimum Dew Point 7.3 °C 23:57 11.7 °C 13.2 °C, 2018 3.1 °C, 2024
Maximum Dew Point 17.6 °C 13:23 16.2 °C 17.6 °C, 2023 6.0 °C, 2024
Mean Dew Point 14.5 °C 13.9 °C 15.3 °C, 2018 4.8 °C, 2024
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 15.4 °C * 04:18 13.9 °C 19.1 °C, 2018 5.1 °C, 2012
Day Maximum (09-21) 19.7 °C 14:47 20.4 °C 23.8 °C, 2018 10.7 °C, 2020
Max 10m Temp Rise 0.4 °C 12:15 0.4 °C 0.7 °C, 2019 0.2 °C, 2010
Max 1hr Temp Rise 1.1 °C 05:21 1.5 °C 2.5 °C, 2021 0.5 °C, 2011
Max 1hr Hum Rise 8% 19:17 6% 8%, 2023 1%, 2014
Max 10m Temp Fall 2.1 °C 18:55 0.6 °C 2.1 °C, 2023 0.2 °C, 2010
Max 1hr Temp Fall 5.7 °C 19:36 1.9 °C 5.7 °C, 2023 0.5 °C, 2010
Max 1hr Hum Fall 9% 14:06 7% 13%, 2015 1%, 2014
Max 10m Wind Speed 17.0 mph 15:58 10.4 mph 17.0 mph, 2023 5.4 mph, 2022
Minimum Feels-like 6.4 °C 23:49 15.4 °C 22.8 °C, 2018 0.0 °C, 2009
Maximum Feels-like 25.3 °C 13:23 25.1 °C 28.9 °C, 2018 0.0 °C, 2009
Mean Feels-like 19.8 °C 20.1 °C 25.3 °C, 2018 0.0 °C, 2009
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.7 °C (+4.4) 7.0 °C (+0.6) 10.7 °C (+4.4), 2023 2.8 °C (-3.5), 2010
Humidity Range 20% 21% 40%, 2009 2%, 2014
Pressure Range 12 hPa 6 hPa 12 hPa, 2019 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [10%]53 hrs (101%) [40%] 8 [82%], 2018 0 [0%], 2010
Wet Hours 9
[Mean rain rate: 1.6 mm/h]
26 hrs (127%) [8.3%] 21, 2014 0, 2009
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 16.8 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 13th October 2023.
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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