Daily Report for 15th January 2014

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.1 °C (+3.1) 00:10 4.7 °C (+1.6) 7.8 °C (+4.8), 2011 -2.7 °C (-5.7), 2024
Maximum Temperature 11.0 °C (+3.2) 13:36 10.3 °C (+2.5) 12.3 °C (+4.5), 2020 1.6 °C (-6.2), 2013
Mean Temperature 9.4 °C (+3.1) 7.7 °C (+2.0) 10.3 °C, 2011 -0.1 °C, 2024
Minimum Humidity 90% 00:02 75% 98%, 2010 53%, 2015
Maximum Humidity 98% 08:33 96% 98%, 2010 83%, 2016
Mean Humidity 95% 87% 98%, 2010 74%, 2015
Minimum Pressure 992 hPa 23:39 996 hPa 1026 hPa, 2021 987 hPa, 2015
Maximum Pressure 1003 hPa 00:45 1008 hPa 1033 hPa, 2021 996 hPa, 2015
Mean Pressure 998 hPa 1002 hPa 1030 hPa, 2021 990 hPa, 2015
Mean Wind Speed 6.0 mph (+0.8) 7.0 mph (+1.8) 10.8 mph, 2015 0.7 mph, 2021
Maximum Wind Speed 14.0 mph 21:51 17.2 mph 28.6 mph, 2020 6.4 mph, 2022
Maximum Gust 18.1 mph 21:51 25.8 mph 42.6 mph, 2020 9.1 mph, 2022
Mean Wind Direction SSW
Rainfall 2.5 mm 69.7 mm (244%) 9.1 mm, 2020
Maximum Hourly Rain 1.0 mm 22:55 3.1 mm, 2020
Maximum 10-min Rain 0.4 mm 00:15 2.0 mm, 2018
Maximum Rain Rate 1.5 mm/h 22:55 66 mm/h, 2018
Minimum Dew Point 4.6 °C 00:02 2.7 °C 5.6 °C, 2011 -6.1 °C, 2024
Maximum Dew Point 10.2 °C 12:49 9.2 °C 10.3 °C, 2020 -0.9 °C, 2024
Mean Dew Point 8.6 °C 5.6 °C 8.6 °C, 2014 -3.5 °C, 2024
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 5.7 °C * 22:52 5.8 °C 7.8 °C, 2011 -0.9 °C, 2024
Day Maximum (09-21) 11.0 °C 13:36 9.7 °C 11.2 °C, 2011 1.6 °C, 2013
Max 10m Temp Rise 0.4 °C 04:23 0.4 °C 0.5 °C, 2012 0.2 °C, 2011
Max 1hr Temp Rise 1.1 °C 04:23 1.3 °C 1.9 °C, 2021 0.5 °C, 2015
Max 1hr Hum Rise 3% 01:01 7% 8%, 2016 0%, 2010
Max 10m Temp Fall 0.2 °C 11:22 0.5 °C 1.2 °C, 2020 0.2 °C, 2010
Max 1hr Temp Fall 0.4 °C 14:46 1.2 °C 3.1 °C, 2020 0.4 °C, 2011
Max 1hr Hum Fall 3% 13:34 9% 18%, 2012 0%, 2010
Max 10m Wind Speed 10.0 mph 13:38 12.4 mph 20.3 mph, 2020 4.8 mph, 2022
Minimum Feels-like 1.9 °C 00:10 1.1 °C 4.3 °C, 2011 -6.8 °C, 2024
Maximum Feels-like 12.3 °C 13:14 10.7 °C 13.7 °C, 2020 0.9 °C, 2024
Mean Feels-like 9.2 °C 6.1 °C 9.9 °C, 2011 -3.2 °C, 2024
Air-frost Hrs 0 hrs 0.6 hrs 14 hrs, 2024 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.9 °C (+0.1) 5.6 °C (+0.8) 8.8 °C (+4.0), 2017 2.0 °C (-2.8), 2009
Humidity Range 8% 21% 40%, 2015 0%, 2010
Pressure Range 11 hPa 12 hPa 22 hPa, 2020 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]42 hrs (130%) [39%] 7.45 [100%], 2024 0 [0%], 2010
Wet Hours 4
[Mean rain rate: 0.6 mm/h]		54 hrs (167%) [15%] 13, 2017 , 2009
Cloud Cover Overcast
Events None
Comments o.night, pm, 22- Light Showers
Extra Comments
Issues 01-08 data corruption; largely corrected
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 15th January 2014.
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