Daily Report for 11th April 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.5 °C (+6.7) 00:05 10.0 °C (+4.4) 12.5 °C (+6.7), 2024 0.7 °C (-5.1), 2021
Maximum Temperature 19.2 °C (+5.2) 15:59 15.9 °C (+2.2) 24.8 °C (+10.8), 2020 8.1 °C (-5.9), 2021
Mean Temperature 14.9 °C (+5.9) 12.5 °C (+3.3) 16.4 °C, 2020 3.9 °C, 2021
Minimum Humidity 72% 16:01 64% 93%, 2009 31%, 2020
Maximum Humidity 92% 01:28 91% 98%, 2013 69%, 2017
Mean Humidity 85% 81% 96%, 2009 55%, 2014
Minimum Pressure 1026 hPa 03:52 1004 hPa 1027 hPa, 2010 994 hPa, 2012
Maximum Pressure 1032 hPa 12:06 1012 hPa 1032 hPa, 2024 999 hPa, 2013
Mean Pressure 1030 hPa 1008 hPa 1030 hPa, 2024 997 hPa, 2013
Mean Wind Speed 6.9 mph (+2.0) 8.4 mph (+3.5) 8.3 mph, 2023 1.8 mph, 2009
Maximum Wind Speed 13.6 mph 19:23 18.8 mph 22.3 mph, 2023 7.8 mph, 2014
Maximum Gust 19.6 mph 00:05 30.2 mph 32.3 mph, 2023 11.0 mph, 2009
Mean Wind Direction W
Rainfall 0.0 mm 20.3 mm (132%) 4.3 mm, 2023
Maximum Hourly Rain n/a 2, 2016
Maximum 10-min Rain n/a 0.5, 2015
Maximum Rain Rate n/a 18, 2015
Minimum Dew Point 11.2 °C 00:05 7.5 °C 11.2 °C, 2024 -4.4 °C, 2015
Maximum Dew Point 14.6 °C 17:13 11.2 °C 14.6 °C, 2024 1.2 °C, 2021
Mean Dew Point 12.4 °C 9.2 °C 12.4 °C, 2024 -1.1 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 11.7 °C * 21:00 9.9 °C 11.7 °C, 2024 0.7 °C, 2021
Day Maximum (09-21) 19.2 °C 16:00 15.9 °C 24.8 °C, 2020 8.1 °C, 2021
Max 10m Temp Rise 0.4 °C 13:33 0.6 °C 0.9 °C, 2011 0.3 °C, 2009
Max 1hr Temp Rise 1.2 °C 14:45 1.8 °C 3.9 °C, 2011 0.4 °C, 2009
Max 1hr Hum Rise 5% 19:23 9% 24%, 2021 2%, 2009
Max 10m Temp Fall 0.4 °C 18:51 0.5 °C 1.7 °C, 2021 0.3 °C, 2009
Max 1hr Temp Fall 1.8 °C 19:49 1.5 °C 3.5 °C, 2020 0.6 °C, 2009
Max 1hr Hum Fall 5% 12:06 9% 27%, 2015 1%, 2009
Max 10m Wind Speed 10.0 mph 19:31 14.7 mph 18.4 mph, 2023 6.3 mph, 2014
Minimum Feels-like 14.4 °C 00:02 9.0 °C 14.4 °C, 2024 -3.5 °C, 2019
Maximum Feels-like 22.7 °C 15:51 17.4 °C 25.7 °C, 2020 7.6 °C, 2021
Mean Feels-like 17.4 °C 13.1 °C 17.4 °C, 2024 2.3 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.7 °C (-1.5) 5.8 °C (-2.2) 16.6 °C (+8.4), 2020 1.7 °C (-6.5), 2009
Humidity Range 20% 28% 57%, 2020 4%, 2009
Pressure Range 6 hPa 9 hPa 16 hPa, 2023 3 hPa, 2014
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [8%]25 hrs (43%) [19%] 11 [90%], 2017 0 [0%], 2009
Wet Hours 025 hrs (145%) [9.3%] 8, 2013 0, 2010
Cloud Cover unknown
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 11.6 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 11th April 2024.
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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