Daily Report for 26th December 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.2 °C (-0.2) 23:57 5.6 °C (+2.0) 14.0 °C (+10.6), 2015 -4.5 °C (-7.9), 2010
Maximum Temperature 12.6 °C (+4.8) 00:03 10.6 °C (+2.5) 14.9 °C (+7.1), 2015 2.5 °C (-5.3), 2010
Mean Temperature 7.3 °C (+2.3) 8.4 °C (+2.3) 14.4 °C, 2015 -1.2 °C, 2010
Minimum Humidity 52% 12:32 72% 94%, 2021 52%, 2016
Maximum Humidity 82% 03:28 81% 98%, 2009 82%, 2016
Mean Humidity 68% 77% 97%, 2013 68%, 2016
Minimum Pressure 1021 hPa 01:31 1022 hPa 1031 hPa, 2011 979 hPa, 2017
Maximum Pressure 1042 hPa 22:52 1028 hPa 1042 hPa, 2016 999 hPa, 2013
Mean Pressure 1032 hPa 1025 hPa 1032 hPa, 2011 993 hPa, 2017
Mean Wind Speed 5.2 mph (+0.1) 3.5 mph (-1.6) 11.3 mph, 2015 1.8 mph, 2018
Maximum Wind Speed 13.8 mph 01:28 10.2 mph 24.7 mph, 2020 5.8 mph, 2018
Maximum Gust 19.9 mph 01:29 14.9 mph 39.3 mph, 2013 10.4 mph, 2018
Mean Wind Direction WNW
Rainfall 1.1 mm 10.5 mm (22%) 14.6 mm, 2021
Maximum Hourly Rain 1.1 mm 03:09 4.6 mm, 2021
Maximum 10-min Rain 0.6 mm 02:19 1.2 mm, 2021
Maximum Rain Rate 3.6 mm/h 02:15 18 mm/h, 2014
Minimum Dew Point -1.9 °C 23:57 1.9 °C 9.2 °C, 2015 -6.3 °C, 2010
Maximum Dew Point 8.9 °C 00:18 6.9 °C 12.4 °C, 2015 -0.8 °C, 2010
Mean Dew Point 1.8 °C 4.6 °C 10.5 °C, 2015 -3.9 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.7 °C * 08:53 6.2 °C 14.1 °C, 2015 -4.5 °C, 2010
Day Maximum (09-21) * 8.2 °C * 12:16 10.4 °C 14.9 °C, 2015 1.3 °C, 2010
Max 10m Temp Rise 0.3 °C 09:29 0.4 °C 0.5 °C, 2010 0.1 °C, 2015
Max 1hr Temp Rise 1.0 °C 09:52 1.2 °C 1.7 °C, 2010 0.3 °C, 2015
Max 1hr Hum Rise 5% 03:22 3% 9%, 2017 1%, 2021
Max 10m Temp Fall 1.2 °C 02:27 0.3 °C 1.4 °C, 2022 0.2 °C, 2009
Max 1hr Temp Fall 3.3 °C 03:11 1.1 °C 3.3 °C, 2016 0.4 °C, 2015
Max 1hr Hum Fall 16% 10:10 4% 19%, 2013 1%, 2021
Max 10m Wind Speed 9.8 mph 01:34 7.7 mph 19.4 mph, 2020 4.5 mph, 2018
Minimum Feels-like -0.5 °C 23:45 3.5 °C 14.9 °C, 2015 -9.4 °C, 2010
Maximum Feels-like 13.4 °C 00:02 11.0 °C 17.0 °C, 2015 2.0 °C, 2010
Mean Feels-like 5.4 °C 7.8 °C 15.9 °C, 2015 -2.4 °C, 2010
Air-frost Hrs 0 hrs 0.2 hrs 13 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.4 °C (+5.0) 5.0 °C (+0.5) 9.4 °C (+5.0), 2020 0.9 °C (-3.5), 2015
Humidity Range 30% 10% 30%, 2016 4%, 2021
Pressure Range 21 hPa 6 hPa 36 hPa, 2020 3 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4 [57%]45 hrs (83%) [25%] 6 [86%], 2022 0 [0%], 2014
Wet Hours 2
[Mean rain rate: 0.6 mm/h]
16 hrs (31%) [2.6%] 9, 2021 0, 2010
Cloud Cover Sunny with periods of Hazy
Events None
Comments o.night Rain
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 26th December 2016.
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