Daily Report for 29th March 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.7 °C (-2.5) 06:34 3.0 °C (-1.3) 11.5 °C (+6.3), 2017 -1.3 °C (-6.5), 2013
Maximum Temperature 15.2 °C (+2.8) 17:50 11.1 °C (+0.2) 19.3 °C (+6.9), 2021 5.7 °C (-6.7), 2013
Mean Temperature 9.0 °C (+0.1) 7.2 °C (-0.6) 13.2 °C, 2017 2.1 °C, 2013
Minimum Humidity 57% 16:45 58% 83%, 2010 32%, 2014
Maximum Humidity 80% 06:50 87% 97%, 2010 70%, 2012
Mean Humidity 69% 74% 91%, 2010 53%, 2012
Minimum Pressure 1011 hPa 17:54 1020 hPa 1035 hPa, 2020 984 hPa, 2024
Maximum Pressure 1016 hPa 00:09 1026 hPa 1041 hPa, 2020 994 hPa, 2024
Mean Pressure 1014 hPa 1023 hPa 1038 hPa, 2020 989 hPa, 2024
Mean Wind Speed 1.2 mph (-4.0) 4.5 mph (-0.7) 10.0 mph, 2015 1.2 mph, 2011
Maximum Wind Speed 6.4 mph 11.7 mph 27.3 mph, 2015 4.0 mph, 2017
Maximum Gust 9.2 mph 12:58 16.3 mph 42.0 mph, 2015 7.3 mph, 2017
Mean Wind Direction ESE
Rainfall 0.5 mm 5.9 mm (16%) 6.9 mm, 2016
Maximum Hourly Rain n/a 12:47 5, 2016
Maximum 10-min Rain 0.5 mm 12:47 1.5 mm, 2016
Maximum Rain Rate 5.0 mm/h 12:47 24 mm/h, 2016
Minimum Dew Point -1.5 °C 04:16 -0.2 °C 7.7 °C, 2017 -7.5 °C, 2013
Maximum Dew Point 7.7 °C 18:50 5.3 °C 11.6 °C, 2023 -3.0 °C, 2013
Mean Dew Point 3.6 °C 2.6 °C 9.7 °C, 2023 -5.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.7 °C 05:40 3.6 °C 11.5 °C, 2017 -1.3 °C, 2013
Day Maximum (09-21) 15.2 °C 16:50 11.1 °C 19.3 °C, 2021 5.7 °C, 2013
Max 10m Temp Rise 0.7 °C 13:54 0.5 °C 1.0 °C, 2009 0.3 °C, 2010
Max 1hr Temp Rise 2.8 °C 14:22 2.0 °C 5.2 °C, 2019 0.9 °C, 2010
Max 1hr Hum Rise 5% 23:10 6% 28%, 2021 5%, 2010
Max 10m Temp Fall 0.2 °C 00:41 0.3 °C 1.4 °C, 2020 0.2 °C, 2010
Max 1hr Temp Fall 0.7 °C 22:29 1.2 °C 2.7 °C, 2012 0.7 °C, 2010
Max 1hr Hum Fall 5% 14:42 9% 26%, 2019 4%, 2022
Max 10m Wind Speed 4.0 mph 13:49 8.0 mph 19.0 mph, 2015 4.0 mph, 2011
Minimum Feels-like 0.9 °C 07:30 0.5 °C 11.8 °C, 2017 -5.6 °C, 2013
Maximum Feels-like 15.4 °C 17:27 11.0 °C 20.3 °C, 2021 3.7 °C, 2020
Mean Feels-like 9.0 °C 5.9 °C 14.2 °C, 2017 -1.3 °C, 2013
Air-frost Hrs 0 hrs 0.4 hrs 6 hrs, 2013 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.5 °C (+5.2) 8.1 °C (+1.5) 14.3 °C (+7.0), 2019 3.5 °C (-3.8), 2017
Humidity Range 23% 30% 59%, 2014 8%, 2017
Pressure Range 5 hPa 5 hPa 14 hPa, 2015 3 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [18%]122 hrs (116%) [40%] 11.4 [100%], 2019 0 [0%], 2017
Wet Hours 0.5
[Mean rain rate: 1.0 mm/h]
7.7 hrs (16%) [1.1%] 7, 2015 , 2009
Cloud Cover am: Partly Cloudy transitioned to Overcast
pm: Mostly Cloudy
Events None
Comments 13 Moderate Shower
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 29th March 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