Daily Report for 8th April 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.1 °C (+0.4) 00:10 2.8 °C (-2.8) 10.0 °C (+4.3), 2024 2.8 °C (-2.9), 2023
Maximum Temperature 13.2 °C (-0.6) 16:55 12.1 °C (-1.4) 20.9 °C (+7.1), 2011 9.9 °C (-3.9), 2013
Mean Temperature 9.8 °C (-0.1) 7.9 °C (-2.1) 14.8 °C, 2020 5.8 °C, 2013
Minimum Humidity 67% 20:27 49% 84%, 2018 36%, 2011
Maximum Humidity 93% 10:05 87% 96%, 2023 75%, 2013
Mean Humidity 78% 68% 92%, 2018 57%, 2011
Minimum Pressure 1008 hPa 22:26 1009 hPa 1030 hPa, 2015 999 hPa, 2022
Maximum Pressure 1014 hPa 01:19 1016 hPa 1034 hPa, 2015 1010 hPa, 2024
Mean Pressure 1011 hPa 1012 hPa 1032 hPa, 2015 1002 hPa, 2022
Mean Wind Speed 4.3 mph (-0.6) 3.7 mph (-1.2) 6.8 mph, 2014 1.0 mph, 2019
Maximum Wind Speed 11.2 mph 11.5 mph 17.5 mph, 2014 5.6 mph, 2019
Maximum Gust 17.5 mph 21:14 16.0 mph 27.0 mph, 2014 9.2 mph, 2019
Mean Wind Direction WSW
Rainfall 0.5 mm 7.4 mm (66%) 6.2 mm, 2018
Maximum Hourly Rain 0.3 mm 07:12 2.0 mm, 2018
Maximum 10-min Rain 0.3 mm 07:12 1.0 mm, 2022
Maximum Rain Rate 0.4 mm/h 07:13 4.8 mm/h, 2022
Minimum Dew Point 1.4 °C 00:09 -1.7 °C 7.8 °C, 2018 -4.6 °C, 2013
Maximum Dew Point 9.0 °C 18:33 5.4 °C 13.2 °C, 2024 0.0 °C, 2013
Mean Dew Point 6.0 °C 2.0 °C 9.6 °C, 2024 -1.9 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 4.7 °C * 21:00 3.4 °C 10.0 °C, 2024 2.8 °C, 2023
Day Maximum (09-21) 13.2 °C 16:54 12.1 °C 20.9 °C, 2011 9.9 °C, 2013
Max 10m Temp Rise 0.5 °C 10:00 0.7 °C 0.9 °C, 2023 0.2 °C, 2018
Max 1hr Temp Rise 1.7 °C 10:21 3.0 °C 3.7 °C, 2017 0.3 °C, 2018
Max 1hr Hum Rise 8% 06:06 8% 13%, 2022 3%, 2018
Max 10m Temp Fall 0.3 °C 13:42 0.6 °C 0.8 °C, 2024 0.2 °C, 2018
Max 1hr Temp Fall 1.0 °C 20:57 1.9 °C 2.5 °C, 2024 0.5 °C, 2018
Max 1hr Hum Fall 6% 20:02 13% 16%, 2014 2%, 2018
Max 10m Wind Speed 7.6 mph 20:11 7.7 mph 13.1 mph, 2014 3.7 mph, 2019
Minimum Feels-like 4.0 °C 06:40 1.2 °C 10.4 °C, 2024 -1.6 °C, 2013
Maximum Feels-like 13.8 °C 16:42 12.1 °C 22.2 °C, 2020 8.3 °C, 2013
Mean Feels-like 9.5 °C 7.1 °C 15.4 °C, 2020 2.9 °C, 2013
Air-frost Hrs 0 hrs 0.7 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.1 °C (-1.0) 9.3 °C (+1.4) 16.5 °C (+8.4), 2017 1.6 °C (-6.5), 2018
Humidity Range 26% 38% 53%, 2009 10%, 2018
Pressure Range 6 hPa 8 hPa 15 hPa, 2014 3 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]35 hrs (85%) [36%] 12.1 [100%], 2011 0 [0%], 2018
Wet Hours 5
[Mean rain rate: 0.1 mm/h]		12 hrs (98%) [6.3%] 10, 2018 0, 2010
Cloud Cover Overcast
Events None
Comments 04-10 Slight/Light Rain/Drizzle
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 8th April 2012.
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

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Wind rose