Daily Report for 16th September 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.0 °C (-1.5) 07:00 14.1 °C (+2.0) 15.4 °C (+3.9), 2020 7.9 °C (-3.6), 2017
Maximum Temperature 17.0 °C (-1.9) 15:00 21.5 °C (+1.4) 26.1 °C (+7.2), 2023 14.2 °C (-4.7), 2013
Mean Temperature 13.6 °C (-1.7) 17.7 °C (+1.7) 20.4 °C, 2020 11.2 °C, 2013
Minimum Humidity 40% 16:00 65% 82%, 2015 40%, 2022
Maximum Humidity 90% 09:00 94% 98%, 2009 83%, 2020
Mean Humidity 67% 82% 91%, 2015 65%, 2013
Minimum Pressure 1010 hPa 11:59 1010 hPa 1027 hPa, 2024 985 hPa, 2015
Maximum Pressure 1017 hPa 11:59 1016 hPa 1033 hPa, 2024 996 hPa, 2015
Mean Pressure 1014 hPa 1013 hPa 1030 hPa, 2024 988 hPa, 2015
Mean Wind Speed 5.0 mph (+1.1) 3.5 mph (-0.4) 8.7 mph, 2016 1.5 mph, 2021
Maximum Wind Speed 14.0 mph 00:00 11.9 mph 19.2 mph, 2016 6.8 mph, 2019
Maximum Gust 24.0 mph 00:00 18.2 mph 30.6 mph, 2016 12.5 mph, 2014
Mean Wind Direction N
Rainfall 0.0 mm 35.0 mm (131%) 26.1 mm, 2015
Maximum Hourly Rain n/a 11.4, 2016
Maximum 10-min Rain n/a 7, 2016
Maximum Rain Rate n/a 120, 2016
Minimum Dew Point 2.0 °C 11:59 12.0 °C 12.3 °C, 2023 2.0 °C, 2022
Maximum Dew Point 8.0 °C 11:59 16.1 °C 18.0 °C, 2023 8.0 °C, 2022
Mean Dew Point 6.0 °C 14.3 °C 15.2 °C, 2020 4.7 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.0 °C 07:00 14.2 °C 18.4 °C, 2020 7.9 °C, 2017
Day Maximum (09-21) 17.0 °C 15:00 21.4 °C 26.1 °C, 2023 14.2 °C, 2013
Max 10m Temp Rise 0.5 °C 00:10 0.6 °C 0.8 °C, 2021 0.2 °C, 2015
Max 1hr Temp Rise 1.0 °C 01:01 1.9 °C 3.8 °C, 2023 0.9 °C, 2010
Max 1hr Hum Rise 10% 01:01 9% 17%, 2020 5%, 2016
Max 10m Temp Fall 0.5 °C 00:10 0.6 °C 1.2 °C, 2013 0.2 °C, 2012
Max 1hr Temp Fall 1.0 °C 01:01 1.7 °C 2.8 °C, 2020 0.9 °C, 2012
Max 1hr Hum Fall 10% 01:01 10% 15%, 2013 4%, 2019
Max 10m Wind Speed 11.0 mph 00:10 8.5 mph 14.3 mph, 2016 4.3 mph, 2019
Minimum Feels-like 9.0 °C 00:00 16.7 °C 17.8 °C, 2020 4.9 °C, 2013
Maximum Feels-like 17.0 °C 00:00 25.8 °C 31.6 °C, 2023 14.3 °C, 2013
Mean Feels-like 14.0 °C 21.4 °C 24.5 °C, 2020 10.6 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.0 °C (-0.4) 7.3 °C (-0.6) 12.8 °C (+5.4), 2023 4.2 °C (-3.2), 2019
Humidity Range 50% 29% 50%, 2022 12%, 2015
Pressure Range 7 hPa 6 hPa 11 hPa, 2015 2 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [70%]56 hrs (68%) [29%] 10.8 [94%], 2025 0 [0%], 2015
Wet Hours 025 hrs (114%) [6.5%] 10, 2015 0, 2010
Cloud Cover am: Partly Cloudy
pm: Mostly Sunny
Events None
Comments -
Extra Comments
Issues no data due to power cut; data from eglc
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 17.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 16th September 2022.
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