Daily Report for 29th November 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.2 °C (+5.0) 23:09 6.0 °C (+0.6) 9.6 °C (+5.4), 2015 -1.8 °C (-6.0), 2021
Maximum Temperature 13.7 °C (+4.1) 12:23 11.3 °C (+0.6) 13.7 °C (+4.1), 2018 1.1 °C (-8.5), 2010
Mean Temperature 12.0 °C (+4.6) 8.8 °C (+0.6) 12.0 °C, 2018 0.1 °C, 2010
Minimum Humidity 74% 12:49 77% 94%, 2022 47%, 2016
Maximum Humidity 93% 07:21 94% 98%, 2009 79%, 2016
Mean Humidity 85% 87% 96%, 2009 68%, 2016
Minimum Pressure 998 hPa 11:15 1009 hPa 1032 hPa, 2016 982 hPa, 2009
Maximum Pressure 1007 hPa 00:12 1017 hPa 1035 hPa, 2016 985 hPa, 2009
Mean Pressure 1002 hPa 1013 hPa 1033 hPa, 2016 984 hPa, 2009
Mean Wind Speed 10.1 mph (+5.5) 4.9 mph (+0.3) 11.2 mph, 2015 0.7 mph, 2020
Maximum Wind Speed 23.8 mph 12:48 14.1 mph 27.9 mph, 2015 4.5 mph, 2016
Maximum Gust 47.2 mph 11:27 22.0 mph 47.2 mph, 2018 7.3 mph, 2016
Mean Wind Direction SSW
Rainfall 2.0 mm 66.2 mm (102%) 16.9 mm, 2009
Maximum Hourly Rain 1.3 mm 21:41 4.3 mm, 2015
Maximum 10-min Rain 1.1 mm 21:41 2.1 mm, 2015
Maximum Rain Rate 26 mm/h 21:37 36 mm/h, 2015
Minimum Dew Point 6.8 °C 23:09 4.3 °C 6.8 °C, 2018 -5.7 °C, 2016
Maximum Dew Point 11.4 °C 02:05 8.5 °C 11.4 °C, 2018 -1.0 °C, 2016
Mean Dew Point 9.5 °C 6.6 °C 9.5 °C, 2018 -4.1 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 11.8 °C * 06:28 6.6 °C 11.8 °C, 2018 -1.8 °C, 2021
Day Maximum (09-21) 13.7 °C 12:24 11.2 °C 13.7 °C, 2018 1.1 °C, 2010
Max 10m Temp Rise 0.3 °C 09:25 0.4 °C 0.7 °C, 2024 0.1 °C, 2020
Max 1hr Temp Rise 0.8 °C 09:58 1.3 °C 2.5 °C, 2024 0.3 °C, 2020
Max 1hr Hum Rise 6% 21:55 6% 11%, 2015 1%, 2022
Max 10m Temp Fall 0.4 °C 22:07 0.4 °C 0.8 °C, 2009 0.2 °C, 2010
Max 1hr Temp Fall 1.5 °C 22:29 1.2 °C 2.5 °C, 2016 0.4 °C, 2020
Max 1hr Hum Fall 8% 10:59 7% 21%, 2013 1%, 2022
Max 10m Wind Speed 19.9 mph 11:53 10.4 mph 20.0 mph, 2015 3.7 mph, 2016
Minimum Feels-like 5.4 °C 23:09 3.4 °C 6.4 °C, 2014 -8.0 °C, 2021
Maximum Feels-like 15.1 °C 12:08 11.9 °C 15.1 °C, 2018 0.6 °C, 2010
Mean Feels-like 12.8 °C 8.1 °C 12.8 °C, 2018 -3.4 °C, 2010
Air-frost Hrs 0 hrs 0.2 hrs 10 hrs, 2021 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.5 °C (-0.9) 5.3 °C (-0.0) 8.0 °C (+2.6), 2024 1.7 °C (-3.7), 2022
Humidity Range 19% 17% 36%, 2013 3%, 2022
Pressure Range 9 hPa 8 hPa 17 hPa, 2019 3 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.4 [5%]84 hrs (103%) [36%] 7.4 [100%], 2016 0 [0%], 2015
Wet Hours 3
[Mean rain rate: 0.7 mm/h]
72 hrs (119%) [10%] 14, 2009 0, 2010
Cloud Cover am: Overcast or Mostly Cloudy
pm: Mostly Cloudy
Events None
Comments o.night, Eve Showers
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 29th November 2018.
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