Daily Report for 23rd November 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.6 °C (-3.9) 07:38 8.9 °C (+3.2) 8.4 °C (+3.9), 2017 0.3 °C (-4.2), 2024
Maximum Temperature 7.1 °C (-3.0) 23:08 13.5 °C (+2.5) 15.3 °C (+5.2), 2017 6.6 °C (-3.5), 2010
Mean Temperature 4.0 °C (-3.4) 11.3 °C (+2.9) 11.0 °C, 2017 4.0 °C, 2015
Minimum Humidity 67% 17:58 75% 96%, 2014 57%, 2017
Maximum Humidity 92% 08:11 90% 98%, 2011 79%, 2016
Mean Humidity 82% 84% 98%, 2014 72%, 2017
Minimum Pressure 1019 hPa 23:53 1012 hPa 1029 hPa, 2021 986 hPa, 2017
Maximum Pressure 1026 hPa 10:00 1019 hPa 1034 hPa, 2021 999 hPa, 2022
Mean Pressure 1023 hPa 1016 hPa 1032 hPa, 2021 993 hPa, 2022
Mean Wind Speed 4.2 mph (-0.4) 6.4 mph (+1.8) 9.8 mph, 2017 0.4 mph, 2021
Maximum Wind Speed 12.3 mph 23:29 16.0 mph 25.3 mph, 2017 4.9 mph, 2021
Maximum Gust 17.5 mph 22:52 23.3 mph 41.5 mph, 2024 10.2 mph, 2011
Mean Wind Direction WSW
Rainfall 0.5 mm 45.3 mm (88%) 29.8 mm, 2014
Maximum Hourly Rain 0.5 mm 23:44 3.9 mm, 2014
Maximum 10-min Rain 0.3 mm 23:44 1.4 mm, 2014
Maximum Rain Rate 0.4 mm/h 23:44 24 mm/h, 2014
Minimum Dew Point -0.9 °C 07:38 5.8 °C 7.1 °C, 2023 -1.6 °C, 2024
Maximum Dew Point 3.4 °C 23:59 11.2 °C 13.6 °C, 2024 3.4 °C, 2015
Mean Dew Point 1.0 °C 8.6 °C 9.0 °C, 2023 1.0 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 0.6 °C 07:38 9.5 °C 9.3 °C, 2017 0.3 °C, 2024
Day Maximum (09-21) * 6.3 °C * 15:03 13.2 °C 13.5 °C, 2024 6.3 °C, 2015
Max 10m Temp Rise 0.4 °C 08:00 0.3 °C 0.8 °C, 2020 0.1 °C, 2014
Max 1hr Temp Rise 1.2 °C 12:03 1.1 °C 2.8 °C, 2020 0.4 °C, 2014
Max 1hr Hum Rise 6% 23:53 4% 10%, 2017 1%, 2014
Max 10m Temp Fall 0.3 °C 07:30 0.4 °C 0.7 °C, 2017 0.2 °C, 2010
Max 1hr Temp Fall 0.7 °C 07:34 1.0 °C 2.4 °C, 2017 0.3 °C, 2018
Max 1hr Hum Fall 8% 13:47 5% 13%, 2017 1%, 2014
Max 10m Wind Speed 9.0 mph 23:00 12.0 mph 18.8 mph, 2017 3.3 mph, 2021
Minimum Feels-like -2.5 °C 01:32 8.2 °C 5.0 °C, 2023 -3.5 °C, 2021
Maximum Feels-like 5.6 °C 14:57 15.4 °C 17.8 °C, 2024 5.5 °C, 2013
Mean Feels-like 1.8 °C 12.0 °C 10.7 °C, 2017 1.8 °C, 2015
Air-frost Hrs 0 hrs 0.4 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.5 °C (+0.9) 4.6 °C (-0.7) 14.4 °C (+8.8), 2024 3.1 °C (-2.5), 2019
Humidity Range 25% 15% 35%, 2017 2%, 2014
Pressure Range 7 hPa 7 hPa 21 hPa, 2017 3 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.5 [33%]30 hrs (45%) [16%] 6.5 [86%], 2017 0 [0%], 2014
Wet Hours 1
[Mean rain rate: 0.5 mm/h]		52 hrs (108%) [9.5%] 16, 2014 0, 2010
Cloud Cover Partly Cloudy with periods of Mostly Cloudy
Events None
Comments 23- Rain
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 23rd November 2015.
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

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose