Daily Report for 6th April 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.9 °C (+6.4) 00:19 9.5 °C (+4.0) 14.1 °C (+8.6), 2024 -2.3 °C (-7.8), 2012
Maximum Temperature 22.4 °C (+8.9) 14:51 16.3 °C (+3.0) 22.4 °C (+8.9), 2011 6.6 °C (-6.9), 2021
Mean Temperature 16.8 °C (+7.6) 13.0 °C (+3.5) 16.8 °C, 2011 3.0 °C, 2021
Minimum Humidity 31% 18:40 53% 80%, 2014 31%, 2011
Maximum Humidity 91% 00:10 87% 96%, 2014 79%, 2017
Mean Humidity 60% 70% 91%, 2014 60%, 2010
Minimum Pressure 1024 hPa 10:23 1016 hPa 1029 hPa, 2015 990 hPa, 2022
Maximum Pressure 1027 hPa 10:46 1021 hPa 1036 hPa, 2015 1006 hPa, 2022
Mean Pressure 1026 hPa 1019 hPa 1031 hPa, 2015 998 hPa, 2022
Mean Wind Speed 6.6 mph (+1.7) 7.0 mph (+2.1) 11.4 mph, 2022 2.1 mph, 2017
Maximum Wind Speed 13.7 mph 15.5 mph 25.2 mph, 2024 8.1 mph, 2017
Maximum Gust 21.9 mph 16:19 23.1 mph 38.0 mph, 2024 10.5 mph, 2017
Mean Wind Direction SW
Rainfall 0.0 mm 1.4 mm (17%) 6.7 mm, 2022
Maximum Hourly Rain n/a 2.4, 2022
Maximum 10-min Rain n/a 2.1, 2022
Maximum Rain Rate n/a 42, 2022
Minimum Dew Point 3.0 °C 19:06 4.2 °C 11.5 °C, 2014 -7.6 °C, 2021
Maximum Dew Point 12.0 °C 07:23 9.8 °C 13.1 °C, 2014 -1.6 °C, 2021
Mean Dew Point 7.8 °C 7.3 °C 12.2 °C, 2014 -4.0 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.9 °C 00:10 9.7 °C 13.7 °C, 2024 -2.3 °C, 2012
Day Maximum (09-21) 22.4 °C 15:00 16.3 °C 22.4 °C, 2011 6.6 °C, 2021
Max 10m Temp Rise 0.5 °C 09:31 0.4 °C 1.0 °C, 2012 0.2 °C, 2014
Max 1hr Temp Rise 2.2 °C 09:51 1.8 °C 4.5 °C, 2012 0.7 °C, 2014
Max 1hr Hum Rise 9% 21:03 7% 18%, 2021 4%, 2010
Max 10m Temp Fall 0.2 °C 20:24 0.6 °C 2.2 °C, 2022 0.2 °C, 2010
Max 1hr Temp Fall 0.9 °C 20:39 1.5 °C 3.1 °C, 2022 0.9 °C, 2010
Max 1hr Hum Fall 9% 09:53 12% 28%, 2016 5%, 2014
Max 10m Wind Speed 9.9 mph 15:24 10.7 mph 19.5 mph, 2024 5.8 mph, 2017
Minimum Feels-like 13.4 °C 01:35 8.6 °C 15.2 °C, 2014 -4.7 °C, 2021
Maximum Feels-like 23.6 °C 14:25 17.3 °C 23.6 °C, 2011 4.6 °C, 2021
Mean Feels-like 17.6 °C 13.2 °C 18.4 °C, 2024 -0.7 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 5 hrs, 2012 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.5 °C (+2.5) 6.9 °C (-1.0) 15.0 °C (+7.0), 2012 2.2 °C (-5.8), 2014
Humidity Range 60% 34% 60%, 2011 14%, 2019
Pressure Range 3 hPa 4 hPa 17 hPa, 2020 2 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11.5 [97%]24 hrs (77%) [33%] 12 [101%], 2017 0 [0%], 2014
Wet Hours 03 hrs (33%) [2.1%] 5, 2014 0, 2009
Cloud Cover am: Hazy with periods of Mostly Sunny
pm: Sunny
Events Maximum possible sunshine
Comments -
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 6th April 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.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose