Daily Report for 20th March 2010

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.3 °C (+2.7) 23:59 1.9 °C (-2.2) 10.6 °C (+6.0), 2024 0.7 °C (-3.9), 2018
Maximum Temperature 12.8 °C (+1.5) 13:39 9.5 °C (-1.0) 16.7 °C (+5.4), 2024 5.8 °C (-5.5), 2013
Mean Temperature 11.3 °C (+2.1) 5.4 °C (-1.6) 13.1 °C, 2024 3.4 °C, 2013
Minimum Humidity 92% 16:05 56% 92%, 2010 44%, 2022
Maximum Humidity 98% 05:43 86% 98%, 2010 79%, 2011
Mean Humidity 96% 72% 96%, 2010 65%, 2012
Minimum Pressure 1002 hPa 17:00 1020 hPa 1034 hPa, 2012 999 hPa, 2013
Maximum Pressure 1006 hPa 22:52 1026 hPa 1036 hPa, 2012 1006 hPa, 2010
Mean Pressure 1004 hPa 1023 hPa 1035 hPa, 2012 1004 hPa, 2010
Mean Wind Speed 6.7 mph (+1.5) 5.1 mph (-0.1) 10.0 mph, 2014 1.7 mph, 2022
Maximum Wind Speed 15.4 mph 12.3 mph 21.9 mph, 2014 8.1 mph, 2016
Maximum Gust 24.6 mph 11:56 17.8 mph 30.4 mph, 2014 13.2 mph, 2011
Mean Wind Direction SW
Rainfall 3.8 mm 10.1 mm (40%) 3.8 mm, 2010
Maximum Hourly Rain 1.1 mm 06:55 1.2 mm, 2014
Maximum 10-min Rain 0.5 mm 06:13 0.6 mm, 2014
Maximum Rain Rate 2.7 mm/h 06:13 3.0 mm/h, 2017
Minimum Dew Point 6.7 °C 23:59 -2.2 °C 9.0 °C, 2024 -2.9 °C, 2011
Maximum Dew Point 12.0 °C 11:33 3.2 °C 12.0 °C, 2010 2.3 °C, 2018
Mean Dew Point 10.7 °C 0.6 °C 10.7 °C, 2010 -0.5 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 10.9 °C * 2.4 °C 11.0 °C, 2017 0.5 °C, 2018
Day Maximum (09-21) 12.8 °C 9.5 °C 16.7 °C, 2024 5.8 °C, 2013
Max 10m Temp Rise 0.2 °C 09:41 0.4 °C 1.3 °C, 2009 0.2 °C, 2010
Max 1hr Temp Rise 0.5 °C 08:52 1.7 °C 3.4 °C, 2012 0.5 °C, 2010
Max 1hr Hum Rise 3% 19:03 6% 11%, 2014 3%, 2010
Max 10m Temp Fall 0.4 °C 22:33 0.3 °C 0.7 °C, 2009 0.2 °C, 2019
Max 1hr Temp Fall 1.8 °C 23:10 1.2 °C 2.7 °C, 2022 0.6 °C, 2019
Max 1hr Hum Fall 3% 12:56 9% 20%, 2018 3%, 2010
Max 10m Wind Speed 9.8 mph 12:05 8.5 mph 17.2 mph, 2014 5.8 mph, 2016
Minimum Feels-like 4.2 °C 23:52 -1.1 °C 11.4 °C, 2024 -4.0 °C, 2018
Maximum Feels-like 14.9 °C 13:21 9.2 °C 18.4 °C, 2024 4.7 °C, 2013
Mean Feels-like 12.7 °C 4.1 °C 14.4 °C, 2024 1.1 °C, 2018
Air-frost Hrs 0 hrs 2 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.5 °C (-1.2) 7.6 °C (+1.2) 11.3 °C (+4.6), 2011 3.6 °C (-3.1), 2019
Humidity Range 6% 30% 42%, 2009 6%, 2010
Pressure Range 4 hPa 6 hPa 17 hPa, 2013 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]101 hrs (142%) [48%] 10.9 [100%], 2009 0 [0%], 2010
Wet Hours 6
[Mean rain rate: 0.6 mm/h]
14 hrs (41%) [2.9%] 6, 2010 , 2009
Cloud Cover not available
Events None
Comments 03, 06-07, 10, 22 Light/Moderate Showers; 10- Slight broken Drizzle
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 20th March 2010.
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


Webcam summary not available for this day

Wind rose