Daily Report for 29th January 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.6 °C (+6.6) 06:24 1.7 °C (-1.3) 9.6 °C (+6.6), 2013 -0.8 °C (-3.8), 2019
Maximum Temperature 13.5 °C (+5.7) 15:56 5.7 °C (-2.1) 13.5 °C (+5.7), 2013 1.3 °C (-6.5), 2011
Mean Temperature 11.6 °C (+6.2) 3.9 °C (-1.7) 11.6 °C, 2013 0.7 °C, 2011
Minimum Humidity 78% 02:06 78% 91%, 2014 64%, 2015
Maximum Humidity 96% 09:40 95% 98%, 2010 77%, 2011
Mean Humidity 91% 88% 95%, 2014 74%, 2011
Minimum Pressure 1000 hPa 23:22 1009 hPa 1028 hPa, 2012 976 hPa, 2015
Maximum Pressure 1004 hPa 07:00 1017 hPa 1034 hPa, 2022 999 hPa, 2014
Mean Pressure 1003 hPa 1013 hPa 1030 hPa, 2012 985 hPa, 2015
Mean Wind Speed 8.9 mph (+3.7) 4.7 mph (-0.5) 12.0 mph, 2016 2.9 mph, 2012
Maximum Wind Speed 19.0 mph 21:18 12.4 mph 23.2 mph, 2016 8.5 mph, 2012
Maximum Gust 33.1 mph 19:35 17.6 mph 33.1 mph, 2013 10.5 mph, 2012
Mean Wind Direction SW
Rainfall 1.5 mm 39.8 mm (72%) 14.0 mm, 2017
Maximum Hourly Rain 0.6 mm 22:55 4.3 mm, 2017
Maximum 10-min Rain 0.4 mm 04:28 1.1 mm, 2017
Maximum Rain Rate 0.7 mm/h 22:55 11 mm/h, 2017
Minimum Dew Point 6.9 °C 02:06 -0.5 °C 7.9 °C, 2024 -4.6 °C, 2010
Maximum Dew Point 12.3 °C 14:13 4.2 °C 12.3 °C, 2013 -2.8 °C, 2011
Mean Dew Point 10.2 °C 1.9 °C 10.2 °C, 2013 -3.3 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.6 °C 06:24 2.3 °C 10.4 °C, 2018 -0.8 °C, 2019
Day Maximum (09-21) 13.5 °C 15:56 5.4 °C 13.5 °C, 2013 1.3 °C, 2011
Max 10m Temp Rise 0.3 °C 08:48 0.3 °C 0.5 °C, 2017 0.1 °C, 2011
Max 1hr Temp Rise 1.3 °C 09:43 0.9 °C 1.9 °C, 2017 0.3 °C, 2014
Max 1hr Hum Rise 5% 03:15 4% 12%, 2015 1%, 2024
Max 10m Temp Fall 0.2 °C 18:05 0.3 °C 0.9 °C, 2015 0.1 °C, 2011
Max 1hr Temp Fall 0.5 °C 04:26 0.9 °C 2.9 °C, 2019 0.3 °C, 2011
Max 1hr Hum Fall 4% 01:49 6% 16%, 2022 1%, 2011
Max 10m Wind Speed 15.2 mph 21:21 9.2 mph 17.3 mph, 2016 6.4 mph, 2012
Minimum Feels-like 6.3 °C 05:04 -1.8 °C 7.1 °C, 2024 -6.0 °C, 2010
Maximum Feels-like 15.7 °C 15:52 5.7 °C 15.7 °C, 2013 1.2 °C, 2011
Mean Feels-like 12.6 °C 2.0 °C 12.6 °C, 2013 -2.8 °C, 2011
Air-frost Hrs 0 hrs 5 hrs 4 hrs, 2019 0 hrs, 2012
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.9 °C (-0.8) 4.0 °C (-0.8) 9.2 °C (+4.5), 2018 1.4 °C (-3.3), 2011
Humidity Range 18% 17% 31%, 2010 4%, 2011
Pressure Range 4 hPa 8 hPa 23 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]32 hrs (49%) [14%] 8 [100%], 2020 0 [0%], 2011
Wet Hours 6
[Mean rain rate: 0.2 mm/h]		65 hrs (104%) [9.4%] 17, 2014 , 2009
Cloud Cover Overcast
Events None
Comments 13 Moderate Shower; o.night, 16- broken Slight Rain/Drizzle
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 29th January 2013.
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