Daily Report for 19th February 2011

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.7 °C (-0.1) 00:47 5.2 °C (+2.3) 7.5 °C (+4.7), 2024 -2.2 °C (-5.1), 2013
Maximum Temperature 6.0 °C (-2.2) 16:29 9.7 °C (+1.7) 13.0 °C (+4.8), 2024 5.7 °C (-2.5), 2012
Mean Temperature 4.6 °C (-1.2) 7.6 °C (+2.0) 9.8 °C, 2024 2.2 °C, 2010
Minimum Humidity 86% 00:00 73% 88%, 2018 40%, 2012
Maximum Humidity 98% 93% 98%, 2010 76%, 2012
Mean Humidity 96% 84% 96%, 2011 61%, 2012
Minimum Pressure 1009 hPa 06:57 1010 hPa 1029 hPa, 2024 987 hPa, 2010
Maximum Pressure 1013 hPa 11:55 1015 hPa 1033 hPa, 2012 996 hPa, 2010
Mean Pressure 1011 hPa 1012 hPa 1031 hPa, 2024 992 hPa, 2010
Mean Wind Speed 4.1 mph (-1.0) 6.5 mph (+1.4) 9.3 mph, 2021 1.4 mph, 2013
Maximum Wind Speed 9.7 mph 14.8 mph 22.6 mph, 2022 7.6 mph, 2013
Maximum Gust 15.4 mph 00:41 21.4 mph 35.4 mph, 2022 10.9 mph, 2013
Mean Wind Direction NE
Rainfall 11.2 mm 32.1 mm (105%) 11.2 mm, 2011
Maximum Hourly Rain 2.5 mm 05:41 2.5 mm, 2011
Maximum 10-min Rain 0.5 mm 06:18 0.8 mm, 2022
Maximum Rain Rate 4.0 mm/h 07:25 18 mm/h, 2015
Minimum Dew Point 0.7 °C 00:11 2.6 °C 5.4 °C, 2018 -8.1 °C, 2012
Maximum Dew Point 5.7 °C 16:08 7.2 °C 10.2 °C, 2024 -1.2 °C, 2012
Mean Dew Point 4.0 °C 5.0 °C 7.5 °C, 2018 -4.4 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 2.3 °C * 23:15 5.6 °C 7.6 °C, 2023 -2.2 °C, 2013
Day Maximum (09-21) 6.0 °C 16:20 9.7 °C 13.0 °C, 2024 5.7 °C, 2012
Max 10m Temp Rise 0.2 °C 05:54 0.3 °C 0.8 °C, 2013 0.2 °C, 2011
Max 1hr Temp Rise 0.8 °C 06:44 1.0 °C 3.5 °C, 2013 0.8 °C, 2011
Max 1hr Hum Rise 3% 03:06 5% 12%, 2016 3%, 2011
Max 10m Temp Fall 0.1 °C 17:51 0.2 °C 0.6 °C, 2012 0.1 °C, 2011
Max 1hr Temp Fall 0.3 °C 18:32 0.8 °C 2.8 °C, 2013 0.3 °C, 2011
Max 1hr Hum Fall 1% 10:00 7% 22%, 2010 1%, 2011
Max 10m Wind Speed 7.0 mph 00:05 10.4 mph 17.7 mph, 2022 6.3 mph, 2018
Minimum Feels-like -1.8 °C 00:42 1.9 °C 3.9 °C, 2018 -4.3 °C, 2010
Maximum Feels-like 6.0 °C 15:39 9.8 °C 13.6 °C, 2024 4.6 °C, 2012
Mean Feels-like 2.9 °C 6.2 °C 8.8 °C, 2024 -0.2 °C, 2010
Air-frost Hrs 0 hrs 0.3 hrs 6 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.3 °C (-2.1) 4.5 °C (-0.6) 11.0 °C (+5.6), 2013 3.3 °C (-2.1), 2011
Humidity Range 12% 20% 45%, 2013 8%, 2018
Pressure Range 4 hPa 6 hPa 20 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]29 hrs (56%) [17%] 9.1 [100%], 2013 0 [0%], 2011
Wet Hours 9
[Mean rain rate: 1.2 mm/h]		34 hrs (97%) [7.5%] 12, 2015 , 2009
Cloud Cover Overcast
Events None
Comments 03-10 Moderate, -13 broken Slight/Light Rain
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 19th February 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

day graph

Webcam Summary of Cloud Conditions

daycamsumdaycamsum2

Wind rose