Daily Report for 31st January 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.3 °C (+1.3) 01:09 3.9 °C (+0.9) 8.9 °C (+5.9), 2020 -4.6 °C (-7.6), 2019
Maximum Temperature 13.3 °C (+5.5) 15:26 8.9 °C (+1.1) 13.3 °C (+5.5), 2016 1.7 °C (-6.1), 2012
Mean Temperature 9.0 °C (+3.4) 6.6 °C (+1.0) 10.7 °C, 2020 -0.5 °C, 2019
Minimum Humidity 72% 00:06 74% 89%, 2014 48%, 2009
Maximum Humidity 91% 12:46 90% 98%, 2014 64%, 2009
Mean Humidity 84% 84% 96%, 2014 56%, 2009
Minimum Pressure 1005 hPa 11:40 1003 hPa 1026 hPa, 2024 979 hPa, 2015
Maximum Pressure 1012 hPa 23:25 1013 hPa 1036 hPa, 2024 993 hPa, 2015
Mean Pressure 1009 hPa 1008 hPa 1030 hPa, 2024 984 hPa, 2015
Mean Wind Speed 7.4 mph (+2.2) 6.0 mph (+0.8) 10.1 mph, 2022 2.7 mph, 2011
Maximum Wind Speed 19.0 mph 20:11 15.2 mph 24.6 mph, 2022 8.1 mph, 2010
Maximum Gust 28.4 mph 20:07 22.4 mph 39.9 mph, 2022 11.8 mph, 2011
Mean Wind Direction WSW
Rainfall 2.4 mm 71.3 mm (121%) 8.7 mm, 2014
Maximum Hourly Rain 1.0 mm 11:06 2.4 mm, 2014
Maximum 10-min Rain 0.3 mm 11:49 0.9 mm, 2014
Maximum Rain Rate 2.2 mm/h 11:49 18 mm/h, 2014
Minimum Dew Point 0.0 °C 00:19 1.0 °C 7.0 °C, 2020 -5.6 °C, 2019
Maximum Dew Point 11.4 °C 15:09 6.6 °C 11.4 °C, 2016 -1.0 °C, 2010
Mean Dew Point 6.4 °C 4.0 °C 8.9 °C, 2020 -3.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.3 °C 01:09 4.5 °C 8.9 °C, 2020 -4.6 °C, 2019
Day Maximum (09-21) 13.3 °C 15:26 8.6 °C 13.3 °C, 2016 1.7 °C, 2012
Max 10m Temp Rise 0.5 °C 13:25 0.3 °C 0.9 °C, 2014 0.2 °C, 2011
Max 1hr Temp Rise 2.1 °C 13:55 1.2 °C 2.7 °C, 2014 0.4 °C, 2018
Max 1hr Hum Rise 4% 09:18 4% 14%, 2019 1%, 2017
Max 10m Temp Fall 0.2 °C 00:24 0.3 °C 1.2 °C, 2013 0.1 °C, 2017
Max 1hr Temp Fall 0.4 °C 01:01 1.1 °C 2.7 °C, 2018 0.3 °C, 2017
Max 1hr Hum Fall 2% 14:40 6% 16%, 2015 1%, 2017
Max 10m Wind Speed 14.3 mph 19:06 11.1 mph 19.6 mph, 2022 6.4 mph, 2010
Minimum Feels-like 0.3 °C 01:37 0.7 °C 5.2 °C, 2020 -7.0 °C, 2010
Maximum Feels-like 15.3 °C 15:16 8.9 °C 15.3 °C, 2016 1.5 °C, 2012
Mean Feels-like 8.6 °C 5.1 °C 10.3 °C, 2020 -3.2 °C, 2019
Air-frost Hrs 0 hrs 1 hrs 13 hrs, 2010 0 hrs, 2013
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.0 °C (+4.2) 5.0 °C (+0.2) 9.0 °C (+4.2), 2016 2.8 °C (-2.0), 2013
Humidity Range 19% 17% 38%, 2015 2%, 2017
Pressure Range 7 hPa 9 hPa 21 hPa, 2014 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]57 hrs (82%) [24%] 8 [99%], 2022 0 [0%], 2012
Wet Hours 4
[Mean rain rate: 0.6 mm/h]
87 hrs (130%) [12%] 8, 2014 , 2009
Cloud Cover Overcast
Events None
Comments am Rain
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 31st 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.
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Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose