Daily Report for 5th January 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.5 °C (+1.4) 00:02 3.1 °C (-0.1) 9.6 °C (+6.4), 2023 -4.2 °C (-7.3), 2010
Maximum Temperature 9.6 °C (+1.8) 14:41 8.9 °C (+1.1) 13.2 °C (+5.4), 2023 1.0 °C (-6.8), 2010
Mean Temperature 7.5 °C (+1.6) 6.2 °C (+0.5) 11.3 °C, 2023 -1.5 °C, 2010
Minimum Humidity 75% 21:16 75% 89%, 2016 46%, 2009
Maximum Humidity 96% 00:35 95% 98%, 2014 81%, 2017
Mean Humidity 88% 87% 93%, 2014 66%, 2009
Minimum Pressure 1023 hPa 23:59 1021 hPa 1038 hPa, 2019 982 hPa, 2016
Maximum Pressure 1033 hPa 00:45 1033 hPa 1041 hPa, 2019 989 hPa, 2016
Mean Pressure 1028 hPa 1028 hPa 1039 hPa, 2019 984 hPa, 2016
Mean Wind Speed 3.9 mph (-1.3) 5.3 mph (+0.1) 11.1 mph, 2012 0.8 mph, 2017
Maximum Wind Speed 11.8 mph 20:03 14.9 mph 25.5 mph, 2012 5.1 mph, 2017
Maximum Gust 17.8 mph 20:02 21.2 mph 44.0 mph, 2012 7.3 mph, 2017
Mean Wind Direction SSW
Rainfall 0.0 mm 17.1 mm (180%) 4.6 mm, 2012
Maximum Hourly Rain n/a 2.4, 2014
Maximum 10-min Rain n/a 1.4, 2012
Maximum Rain Rate n/a 20, 2012
Minimum Dew Point 3.9 °C 00:02 0.9 °C 7.7 °C, 2023 -5.2 °C, 2010
Maximum Dew Point 8.5 °C 13:07 7.9 °C 11.7 °C, 2014 -1.0 °C, 2010
Mean Dew Point 5.6 °C 4.0 °C 9.1 °C, 2023 -3.3 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 3.2 °C * 21:03 4.0 °C 9.6 °C, 2023 -4.2 °C, 2010
Day Maximum (09-21) 9.6 °C 14:41 7.5 °C 13.2 °C, 2023 1.0 °C, 2010
Max 10m Temp Rise 0.2 °C 10:40 0.2 °C 0.6 °C, 2016 0.2 °C, 2013
Max 1hr Temp Rise 0.9 °C 09:33 0.7 °C 1.8 °C, 2010 0.5 °C, 2019
Max 1hr Hum Rise 1% 08:59 4% 11%, 2012 1%, 2015
Max 10m Temp Fall 0.1 °C 16:56 0.3 °C 0.9 °C, 2012 0.1 °C, 2014
Max 1hr Temp Fall 0.3 °C 17:24 0.8 °C 2.1 °C, 2012 0.3 °C, 2015
Max 1hr Hum Fall 5% 15:24 6% 16%, 2012 2%, 2016
Max 10m Wind Speed 8.7 mph 19:12 10.6 mph 17.1 mph, 2012 3.4 mph, 2017
Minimum Feels-like 2.6 °C 00:01 0.1 °C 7.0 °C, 2023 -8.9 °C, 2010
Maximum Feels-like 10.0 °C 13:07 9.7 °C 14.7 °C, 2023 1.0 °C, 2010
Mean Feels-like 6.1 °C 4.6 °C 11.9 °C, 2023 -3.6 °C, 2010
Air-frost Hrs 0 hrs 0.8 hrs 13 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.1 °C (+0.4) 5.9 °C (+1.2) 10.0 °C (+5.3), 2014 2.0 °C (-2.7), 2020
Humidity Range 21% 20% 40%, 2009 5%, 2016
Pressure Range 10 hPa 12 hPa 21 hPa, 2012 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]6 hrs (57%) [17%] 7.2 [101%], 2017 0 [0%], 2013
Wet Hours 013 hrs (120%) [11%] 2, 2010 , 2009
Cloud Cover Overcast
Events None
Comments -
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 5th January 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