Daily Report for 10th December 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.5 °C (+5.8) 23:32 9.6 °C (+5.7) 9.5 °C (+5.8), 2015 -3.3 °C (-7.0), 2022
Maximum Temperature 12.0 °C (+3.6) 13:58 13.0 °C (+4.2) 13.7 °C (+5.2), 2016 2.6 °C (-5.8), 2017
Mean Temperature 11.1 °C (+4.7) 11.6 °C (+5.0) 12.0 °C, 2016 -1.0 °C, 2022
Minimum Humidity 71% 08:02 68% 86%, 2022 53%, 2014
Maximum Humidity 90% 23:04 87% 98%, 2013 79%, 2016
Mean Humidity 78% 79% 92%, 2017 71%, 2014
Minimum Pressure 1021 hPa 23:43 1018 hPa 1032 hPa, 2024 972 hPa, 2017
Maximum Pressure 1029 hPa 00:45 1026 hPa 1034 hPa, 2024 1003 hPa, 2020
Mean Pressure 1024 hPa 1022 hPa 1033 hPa, 2024 982 hPa, 2017
Mean Wind Speed 9.2 mph (+4.1) 8.3 mph (+3.2) 9.4 mph, 2021 2.5 mph, 2022
Maximum Wind Speed 17.8 mph 03:06 18.7 mph 23.0 mph, 2014 7.6 mph, 2022
Maximum Gust 26.8 mph 05:06 27.9 mph 33.7 mph, 2014 11.5 mph, 2022
Mean Wind Direction SW
Rainfall 5.7 mm 17.1 mm (93%) 20.5 mm, 2017
Maximum Hourly Rain 1.9 mm 21:15 5.1 mm, 2017
Maximum 10-min Rain 0.6 mm 22:31 2.0 mm, 2019
Maximum Rain Rate 18 mm/h 21:33 40 mm/h, 2019
Minimum Dew Point 6.0 °C 06:31 5.2 °C 6.0 °C, 2015 -4.2 °C, 2022
Maximum Dew Point 9.4 °C 19:26 10.4 °C 10.4 °C, 2014 0.6 °C, 2011
Mean Dew Point 7.4 °C 8.0 °C 8.3 °C, 2016 -2.1 °C, 2022
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 10.5 °C * 21:06 10.3 °C 11.2 °C, 2016 -2.3 °C, 2022
Day Maximum (09-21) 12.0 °C 13:58 12.9 °C 13.7 °C, 2016 1.0 °C, 2017
Max 10m Temp Rise 0.2 °C 09:08 0.3 °C 0.7 °C, 2017 0.2 °C, 2012
Max 1hr Temp Rise 0.6 °C 10:06 1.1 °C 2.3 °C, 2013 0.4 °C, 2016
Max 1hr Hum Rise 7% 11:50 5% 11%, 2017 2%, 2016
Max 10m Temp Fall 0.5 °C 19:46 0.3 °C 0.7 °C, 2013 0.2 °C, 2010
Max 1hr Temp Fall 1.2 °C 20:21 0.8 °C 2.5 °C, 2016 0.3 °C, 2020
Max 1hr Hum Fall 3% 12:56 6% 24%, 2014 3%, 2012
Max 10m Wind Speed 14.2 mph 01:54 14.0 mph 17.6 mph, 2014 5.7 mph, 2022
Minimum Feels-like 6.6 °C 23:10 8.4 °C 6.6 °C, 2015 -7.5 °C, 2022
Maximum Feels-like 12.5 °C 13:50 14.3 °C 14.8 °C, 2016 2.3 °C, 2017
Mean Feels-like 11.2 °C 12.0 °C 12.4 °C, 2016 -3.0 °C, 2022
Air-frost Hrs 0 hrs 0 hrs 18 hrs, 2022 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.5 °C (-2.2) 3.4 °C (-1.5) 9.5 °C (+4.8), 2019 1.5 °C (-3.2), 2024
Humidity Range 19% 19% 39%, 2014 4%, 2016
Pressure Range 8 hPa 9 hPa 32 hPa, 2017 1 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]16 hrs (75%) [22%] 6.5 [92%], 2011 0 [0%], 2010
Wet Hours 5
[Mean rain rate: 1.1 mm/h]		24 hrs (119%) [9.9%] 12, 2017 0, 2010
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments 19- 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 10th December 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose