Daily Report for 14th April 2016

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.5 °C (+2.6) 06:05 6.3 °C (+0.6) 11.3 °C (+5.4), 2013 -0.7 °C (-6.6), 2019
Maximum Temperature 16.5 °C (+2.3) 14:44 14.3 °C (+0.5) 21.8 °C (+7.6), 2015 10.2 °C (-4.0), 2019
Mean Temperature 13.1 °C (+2.4) 10.2 °C (+0.6) 14.9 °C, 2013 5.0 °C, 2019
Minimum Humidity 49% 20:37 46% 71%, 2023 35%, 2015
Maximum Humidity 79% 04:53 86% 98%, 2013 73%, 2011
Mean Humidity 62% 67% 84%, 2023 56%, 2014
Minimum Pressure 1005 hPa 23:43 1006 hPa 1033 hPa, 2021 1004 hPa, 2023
Maximum Pressure 1011 hPa 03:58 1010 hPa 1035 hPa, 2021 1009 hPa, 2023
Mean Pressure 1006 hPa 1007 hPa 1034 hPa, 2021 1006 hPa, 2016
Mean Wind Speed 1.9 mph (-3.0) 4.0 mph (-0.9) 9.7 mph, 2013 1.0 mph, 2022
Maximum Wind Speed 7.8 mph 14:31 11.6 mph 20.6 mph, 2013 6.8 mph, 2022
Maximum Gust 11.5 mph 17:31 18.5 mph 29.3 mph, 2013 10.3 mph, 2022
Mean Wind Direction S
Rainfall 2.5 mm 18.1 mm (92%) 5.3 mm, 2023
Maximum Hourly Rain 2.0 mm 00:59 2.7 mm, 2023
Maximum 10-min Rain 2.0 mm 00:30 2.0 mm, 2016
Maximum Rain Rate 5.0 mm/h 00:31 16 mm/h, 2009
Minimum Dew Point 2.9 °C 21:06 1.5 °C 7.2 °C, 2018 -3.0 °C, 2019
Maximum Dew Point 7.0 °C 15:04 7.4 °C 11.5 °C, 2009 1.9 °C, 2019
Mean Dew Point 6.3 °C 4.1 °C 9.5 °C, 2022 -0.3 °C, 2019
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.8 °C * 06:05 6.6 °C 10.9 °C, 2013 -0.7 °C, 2019
Day Maximum (09-21) * 16.7 °C * 14:44 14.3 °C 21.8 °C, 2015 10.2 °C, 2019
Max 10m Temp Rise 0.8 °C 15:33 0.6 °C 0.8 °C, 2016 0.4 °C, 2011
Max 1hr Temp Rise 2.1 °C 10:55 2.5 °C 3.9 °C, 2019 1.6 °C, 2014
Max 1hr Hum Rise 12% 14:47 11% 16%, 2014 4%, 2011
Max 10m Temp Fall 0.7 °C 14:12 0.6 °C 0.7 °C, 2016 0.3 °C, 2010
Max 1hr Temp Fall 1.7 °C 14:46 1.7 °C 1.9 °C, 2015 1.1 °C, 2017
Max 1hr Hum Fall 12% 20:36 15% 17%, 2012 3%, 2017
Max 10m Wind Speed 5.8 mph 14:39 8.8 mph 16.2 mph, 2013 4.6 mph, 2022
Minimum Feels-like 9.5 °C 05:31 4.2 °C 12.5 °C, 2013 -3.2 °C, 2019
Maximum Feels-like 17.0 °C 15:34 14.4 °C 21.8 °C, 2015 10.2 °C, 2019
Mean Feels-like 13.1 °C 9.4 °C 15.7 °C, 2013 3.0 °C, 2019
Air-frost Hrs 0 hrs 0 hrs 2 hrs, 2019 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.0 °C (-0.3) 8.0 °C (-0.1) 14.3 °C (+6.0), 2015 6.0 °C (-2.3), 2024
Humidity Range 30% 40% 54%, 2013 19%, 2011
Pressure Range 6 hPa 4 hPa 8 hPa, 2024 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3.5 [28%]60 hrs (83%) [35%] 12.4 [100%], 2015 0 [0%], 2011
Wet Hours 2
[Mean rain rate: 1.2 mm/h]		24 hrs (112%) [7.1%] 5, 2023 0, 2010
Cloud Cover Partly Cloudy or Mostly Cloudy
Events None
Comments o.night, 14 Showers; 23- Rain
Extra Comments
Issues UCL data until 2045 (Harpenden for wind). T/H and rain data corrected.
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 14th April 2016.
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

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose