Daily Report for 7th January 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.6 °C (-2.5) 01:12 1.8 °C (-1.4) 8.7 °C (+5.6), 2014 -5.3 °C (-8.4), 2010
Maximum Temperature 10.1 °C (+2.3) 21:06 6.0 °C (-1.8) 12.6 °C (+4.8), 2020 0.1 °C (-7.7), 2010
Mean Temperature 5.8 °C (-0.1) 4.1 °C (-1.6) 10.3 °C, 2014 -2.6 °C, 2010
Minimum Humidity 93% 23:59 79% 93%, 2011 59%, 2009
Maximum Humidity 98% 93% 98%, 2011 80%, 2009
Mean Humidity 97% 87% 97%, 2011 68%, 2012
Minimum Pressure 997 hPa 20:12 1009 hPa 1030 hPa, 2017 977 hPa, 2016
Maximum Pressure 1003 hPa 02:31 1017 hPa 1038 hPa, 2019 1000 hPa, 2016
Mean Pressure 1000 hPa 1013 hPa 1032 hPa, 2019 988 hPa, 2016
Mean Wind Speed 4.9 mph (-0.3) 4.1 mph (-1.1) 11.1 mph, 2023 1.8 mph, 2009
Maximum Wind Speed 14.0 mph 11.3 mph 21.9 mph, 2014 7.9 mph, 2021
Maximum Gust 20.8 mph 17:16 15.5 mph 34.2 mph, 2016 10.0 mph, 2009
Mean Wind Direction SE
Rainfall 9.0 mm 20.0 mm (150%) 11.8 mm, 2016
Maximum Hourly Rain 3.3 mm 10:49 3.9 mm, 2016
Maximum 10-min Rain 1.4 mm 10:04 2.4 mm, 2014
Maximum Rain Rate 30 mm/h 10:08 54 mm/h, 2014
Minimum Dew Point 0.2 °C 01:12 -0.5 °C 6.5 °C, 2013 -6.3 °C, 2010
Maximum Dew Point 9.8 °C 19:27 4.5 °C 11.3 °C, 2020 -1.7 °C, 2010
Mean Dew Point 5.4 °C 2.0 °C 8.1 °C, 2023 -3.9 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 0.6 °C 01:10 2.2 °C 10.6 °C, 2023 -5.3 °C, 2010
Day Maximum (09-21) 10.1 °C 19:30 5.5 °C 12.4 °C, 2020 0.1 °C, 2010
Max 10m Temp Rise 0.4 °C 15:15 0.3 °C 0.4 °C, 2010 0.2 °C, 2012
Max 1hr Temp Rise 1.5 °C 15:34 0.9 °C 1.8 °C, 2015 0.6 °C, 2012
Max 1hr Hum Rise 1% 01:17 4% 10%, 2014 1%, 2011
Max 10m Temp Fall 0.3 °C 00:18 0.3 °C 0.9 °C, 2016 0.1 °C, 2013
Max 1hr Temp Fall 0.7 °C 01:08 0.9 °C 2.8 °C, 2016 0.3 °C, 2017
Max 1hr Hum Fall 3% 22:57 4% 14%, 2016 1%, 2017
Max 10m Wind Speed 9.0 mph 17:29 7.6 mph 16.1 mph, 2014 6.5 mph, 2017
Minimum Feels-like -2.0 °C 06:59 -1.0 °C 5.2 °C, 2012 -11.5 °C, 2010
Maximum Feels-like 11.3 °C 19:02 6.1 °C 14.5 °C, 2020 0.0 °C, 2010
Mean Feels-like 4.4 °C 2.6 °C 9.8 °C, 2014 -6.3 °C, 2010
Air-frost Hrs 0 hrs 0.3 hrs 22 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.5 °C (+4.8) 4.2 °C (-0.4) 9.5 °C (+4.8), 2011 2.1 °C (-2.6), 2013
Humidity Range 5% 14% 26%, 2016 4%, 2017
Pressure Range 6 hPa 8 hPa 23 hPa, 2016 2 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.2 [3%]4.8 hrs (32%) [9.6%] 6.7 [93%], 2018 0 [0%], 2009
Wet Hours 5
[Mean rain rate: 1.8 mm/h]
14 hrs (95%) [8.6%] 9, 2016 , 2009
Cloud Cover am: Overcast
pm: Overcast transitioned to Mostly Cloudy
Events None
Comments 03-12 Light Showers (10 Heavy, 11 Moderate); 16-18 Light/Moderate Rain
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 7th January 2011.
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

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Webcam Summary of Cloud Conditions

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Wind rose