Daily Report for 13th April 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.1 °C (+6.2) 23:57 10.2 °C (+4.5) 12.1 °C (+6.2), 2024 -0.6 °C (-6.5), 2021
Maximum Temperature 20.8 °C (+6.6) 15:06 16.7 °C (+2.9) 20.8 °C (+6.6), 2024 8.8 °C (-5.4), 2019
Mean Temperature 15.7 °C (+6.4) 12.9 °C (+3.7) 15.7 °C, 2024 4.8 °C, 2019
Minimum Humidity 48% 15:27 62% 78%, 2018 39%, 2016
Maximum Humidity 90% 06:38 91% 97%, 2009 71%, 2017
Mean Humidity 75% 80% 87%, 2013 54%, 2016
Minimum Pressure 1020 hPa 16:33 1007 hPa 1032 hPa, 2021 995 hPa, 2023
Maximum Pressure 1028 hPa 00:06 1015 hPa 1034 hPa, 2021 1006 hPa, 2012
Mean Pressure 1024 hPa 1011 hPa 1034 hPa, 2021 1002 hPa, 2023
Mean Wind Speed 8.2 mph (+3.3) 8.4 mph (+3.5) 9.6 mph, 2020 1.5 mph, 2016
Maximum Wind Speed 17.4 mph 14:11 18.8 mph 19.4 mph, 2020 7.4 mph, 2012
Maximum Gust 24.2 mph 12:30 29.7 mph 27.6 mph, 2020 10.0 mph, 2012
Mean Wind Direction W
Rainfall 0.0 mm 20.3 mm (112%) 6.5 mm, 2013
Maximum Hourly Rain n/a 2.1, 2013
Maximum 10-min Rain n/a 1.2, 2012
Maximum Rain Rate n/a 17, 2013
Minimum Dew Point 8.6 °C 22:42 7.6 °C 9.1 °C, 2022 -4.2 °C, 2021
Maximum Dew Point 13.4 °C 11:36 11.6 °C 13.4 °C, 2024 2.9 °C, 2011
Mean Dew Point 11.0 °C 9.5 °C 11.0 °C, 2024 -0.5 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 12.2 °C * 05:58 10.1 °C 12.2 °C, 2024 -0.6 °C, 2021
Day Maximum (09-21) 20.8 °C 15:06 16.7 °C 20.8 °C, 2024 8.8 °C, 2019
Max 10m Temp Rise 0.6 °C 10:22 0.6 °C 1.2 °C, 2021 0.3 °C, 2018
Max 1hr Temp Rise 2.0 °C 11:02 1.9 °C 5.1 °C, 2021 1.3 °C, 2018
Max 1hr Hum Rise 12% 18:59 9% 25%, 2023 3%, 2017
Max 10m Temp Fall 0.6 °C 19:23 0.5 °C 1.3 °C, 2019 0.2 °C, 2018
Max 1hr Temp Fall 2.3 °C 20:02 1.6 °C 2.7 °C, 2019 0.7 °C, 2018
Max 1hr Hum Fall 16% 13:55 9% 25%, 2019 5%, 2018
Max 10m Wind Speed 13.7 mph 15:35 14.6 mph 14.5 mph, 2020 6.1 mph, 2012
Minimum Feels-like 12.9 °C 23:56 9.4 °C 12.9 °C, 2024 -2.9 °C, 2019
Maximum Feels-like 22.8 °C 13:50 18.4 °C 22.8 °C, 2024 8.6 °C, 2019
Mean Feels-like 17.4 °C 13.7 °C 17.4 °C, 2024 2.5 °C, 2019
Air-frost Hrs 0 hrs 0 hrs 5 hrs, 2021 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.7 °C (+0.4) 6.5 °C (-1.6) 12.5 °C (+4.2), 2021 5.6 °C (-2.7), 2018
Humidity Range 42% 29% 55%, 2012 17%, 2018
Pressure Range 8 hPa 8 hPa 13 hPa, 2020 2 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [65%]40 hrs (59%) [25%] 12.2 [98%], 2014 0 [0%], 2018
Wet Hours 025 hrs (123%) [7.9%] 7, 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 13th 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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