Daily Report for 16th January 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.1 °C (-2.9) 08:32 4.2 °C (+1.1) 9.8 °C (+6.8), 2011 -3.7 °C (-6.7), 2024
Maximum Temperature 4.3 °C (-3.5) 13:51 8.2 °C (+0.4) 12.3 °C (+4.5), 2011 -0.8 °C (-8.6), 2013
Mean Temperature 1.9 °C (-3.2) 6.3 °C (+0.7) 11.1 °C, 2011 -2.4 °C, 2013
Minimum Humidity 73% 15:20 77% 90%, 2010 51%, 2012
Maximum Humidity 87% 04:16 90% 98%, 2010 83%, 2015
Mean Humidity 82% 85% 96%, 2010 69%, 2015
Minimum Pressure 1026 hPa 01:21 993 hPa 1026 hPa, 2016 983 hPa, 2023
Maximum Pressure 1030 hPa 11:45 1004 hPa 1036 hPa, 2022 990 hPa, 2023
Mean Pressure 1028 hPa 998 hPa 1028 hPa, 2016 987 hPa, 2023
Mean Wind Speed 2.8 mph (-2.4) 5.6 mph (+0.4) 9.1 mph, 2018 1.0 mph, 2017
Maximum Wind Speed 7.1 mph 02:27 14.8 mph 22.8 mph, 2018 5.0 mph, 2017
Maximum Gust 10.9 mph 02:26 22.3 mph 36.9 mph, 2018 7.1 mph, 2013
Mean Wind Direction NW
Rainfall / Snow-melt approx. 1.1 mm 51.7 mm (170%) 9.4 mm, 2014
Maximum Hourly Rain 1.0 mm 23:36 2.7 mm, 2014
Maximum 10-min Rain 0.4 mm 22:54 1.9 mm, 2014
Maximum Rain Rate 18 mm/h 22:46 36 mm/h, 2014
Minimum Dew Point -2.3 °C 08:29 1.6 °C 6.0 °C, 2011 -6.5 °C, 2024
Maximum Dew Point 0.4 °C 13:43 5.9 °C 9.7 °C, 2011 -1.4 °C, 2024
Mean Dew Point -0.9 °C 4.0 °C 8.4 °C, 2011 -3.6 °C, 2024
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 0.1 °C 08:32 4.5 °C 10.3 °C, 2011 -3.7 °C, 2024
Day Maximum (09-21) 4.3 °C 13:51 8.0 °C 12.3 °C, 2011 -0.8 °C, 2013
Max 10m Temp Rise 0.3 °C 11:56 0.3 °C 0.5 °C, 2012 0.2 °C, 2010
Max 1hr Temp Rise 1.4 °C 10:54 1.1 °C 1.8 °C, 2012 0.4 °C, 2017
Max 1hr Hum Rise 3% 17:44 4% 11%, 2014 1%, 2017
Max 10m Temp Fall 0.3 °C 16:39 0.3 °C 1.1 °C, 2015 0.2 °C, 2010
Max 1hr Temp Fall 1.2 °C 16:48 1.2 °C 3.5 °C, 2019 0.8 °C, 2011
Max 1hr Hum Fall 4% 11:23 6% 17%, 2012 2%, 2013
Max 10m Wind Speed 5.5 mph 02:21 10.8 mph 15.6 mph, 2018 3.8 mph, 2013
Minimum Feels-like -3.8 °C 06:00 0.6 °C 8.3 °C, 2011 -8.0 °C, 2024
Maximum Feels-like 4.3 °C 13:54 7.9 °C 13.0 °C, 2020 -0.8 °C, 2013
Mean Feels-like 0.1 °C 4.2 °C 11.7 °C, 2011 -3.2 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 24 hrs, 2013 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.2 °C (-0.6) 4.0 °C (-0.7) 7.2 °C (+2.4), 2024 2.5 °C (-2.3), 2011
Humidity Range 14% 13% 39%, 2012 5%, 2017
Pressure Range 4 hPa 11 hPa 15 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 5 [67%]28 hrs (82%) [24%] 7.5 [100%], 2012 0 [0%], 2010
Wet Hours 2
[Mean rain rate: 0.6 mm/h]		55 hrs (158%) [14%] 8, 2017 , 2009
Cloud Cover Mostly Sunny or Partly Cloudy
Events Snowfall: trace amount
Comments 22- Rain->Sleet
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 16th January 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose