Daily Report for 10th February 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.4 °C (-2.5) 23:49 1.6 °C (-1.3) 8.3 °C (+5.4), 2011 -5.1 °C (-8.0), 2012
Maximum Temperature 4.9 °C (-3.0) 10:51 6.3 °C (-1.6) 11.4 °C (+3.5), 2024 1.6 °C (-6.3), 2012
Mean Temperature 3.2 °C (-2.8) 4.2 °C (-1.4) 9.8 °C, 2024 -0.7 °C, 2012
Minimum Humidity 89% 00:03 63% 89%, 2013 55%, 2009
Maximum Humidity 98% 23:59 90% 98%, 2009 83%, 2016
Mean Humidity 95% 77% 95%, 2013 75%, 2016
Minimum Pressure 991 hPa 20:39 1004 hPa 1037 hPa, 2012 977 hPa, 2009
Maximum Pressure 1012 hPa 00:08 1017 hPa 1039 hPa, 2012 986 hPa, 2024
Mean Pressure 999 hPa 1011 hPa 1038 hPa, 2012 984 hPa, 2024
Mean Wind Speed 5.1 mph (-0.0) 5.7 mph (+0.6) 12.9 mph, 2020 1.9 mph, 2012
Maximum Wind Speed 14.7 mph 14:15 15.2 mph 28.0 mph, 2020 8.3 mph, 2024
Maximum Gust 21.9 mph 12:52 21.9 mph 46.1 mph, 2020 10.9 mph, 2012
Mean Wind Direction SSE
Rainfall / Snow-melt approx. 12.9 mm 25.2 mm (157%) 12.9 mm, 2013
Maximum Hourly Rain 1.9 mm 17:11 4.2 mm, 2020
Maximum 10-min Rain 0.7 mm 17:34 2.0 mm, 2020
Maximum Rain Rate 3.0 mm/h 17:02 30 mm/h, 2020
Minimum Dew Point 0.1 °C 21:37 -3.0 °C 7.0 °C, 2024 -8.6 °C, 2012
Maximum Dew Point 4.2 °C 10:35 3.7 °C 10.1 °C, 2011 -2.4 °C, 2021
Mean Dew Point 2.4 °C 0.4 °C 8.5 °C, 2011 -4.1 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 3.2 °C * 00:32 2.5 °C 8.4 °C, 2024 -1.8 °C, 2021
Day Maximum (09-21) 4.9 °C 10:51 6.1 °C 11.4 °C, 2024 1.6 °C, 2012
Max 10m Temp Rise 0.1 °C 03:32 0.3 °C 0.8 °C, 2023 0.1 °C, 2011
Max 1hr Temp Rise 0.5 °C 02:39 1.1 °C 2.4 °C, 2023 0.3 °C, 2017
Max 1hr Hum Rise 3% 01:01 8% 15%, 2010 2%, 2015
Max 10m Temp Fall 0.2 °C 14:54 0.4 °C 1.7 °C, 2020 0.1 °C, 2011
Max 1hr Temp Fall 1.0 °C 17:27 1.1 °C 3.6 °C, 2020 0.4 °C, 2011
Max 1hr Hum Fall 2% 11:18 9% 14%, 2014 2%, 2011
Max 10m Wind Speed 11.0 mph 14:22 11.2 mph 19.5 mph, 2020 5.6 mph, 2024
Minimum Feels-like -4.4 °C 21:50 -2.9 °C 6.5 °C, 2024 -8.4 °C, 2012
Maximum Feels-like 4.6 °C 05:51 5.8 °C 12.4 °C, 2024 -0.1 °C, 2021
Mean Feels-like 0.5 °C 1.5 °C 9.7 °C, 2024 -4.1 °C, 2021
Air-frost Hrs 0 hrs 0.0 hrs 16 hrs, 2021 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.5 °C (-0.5) 4.7 °C (-0.2) 10.6 °C (+5.6), 2018 0.9 °C (-4.1), 2017
Humidity Range 9% 27% 43%, 2009 9%, 2013
Pressure Range 21 hPa 13 hPa 36 hPa, 2009 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]24 hrs (92%) [29%] 5 [58%], 2021 0 [0%], 2011
Wet Hours 23
[Mean rain rate: 0.6 mm/h]		41 hrs (221%) [17%] 23, 2013 , 2009
Cloud Cover Overcast
Events Snowfall: ~3 cm
Comments 00-24 Drizzle/Rain (->Snow at approx. 18)
Extra Comments 1cm lying snow by 23z
Issues wind sensor froze (from snow) at 23z
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 10th February 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose