Daily Report for 3rd May 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.2 °C (-1.1) 23:57 6.8 °C (-0.5) 10.2 °C (+2.9), 2022 1.9 °C (-5.4), 2014
Maximum Temperature 13.8 °C (-2.5) 15:45 15.9 °C (-0.5) 20.8 °C (+4.5), 2025 8.9 °C (-7.4), 2012
Mean Temperature 9.2 °C (-1.8) 11.2 °C (-0.5) 14.4 °C, 2025 6.8 °C, 2010
Minimum Humidity 64% 15:45 56% 90%, 2012 29%, 2011
Maximum Humidity 95% 03:52 93% 95%, 2015 71%, 2009
Mean Humidity 84% 78% 92%, 2012 49%, 2013
Minimum Pressure 1013 hPa 17:03 1014 hPa 1026 hPa, 2014 994 hPa, 2015
Maximum Pressure 1017 hPa 09:05 1019 hPa 1030 hPa, 2014 1003 hPa, 2015
Mean Pressure 1015 hPa 1016 hPa 1028 hPa, 2014 998 hPa, 2015
Mean Wind Speed 2.2 mph (-2.5) 2.5 mph (-2.2) 10.2 mph, 2021 2.1 mph, 2020
Maximum Wind Speed 11.5 mph 21:33 11.0 mph 24.7 mph, 2021 7.8 mph, 2014
Maximum Gust 17.3 mph 21:37 17.7 mph 37.6 mph, 2021 10.7 mph, 2014
Mean Wind Direction NNW
Rainfall 2.6 mm 7.7 mm (173%) 6.6 mm, 2024
Maximum Hourly Rain 2.4 mm 17:41 2.5 mm, 2017
Maximum 10-min Rain 1.5 mm 17:41 1.7 mm, 2017
Maximum Rain Rate 13 mm/h 17:32 36 mm/h, 2017
Minimum Dew Point 3.4 °C 22:32 4.5 °C 8.1 °C, 2024 -4.2 °C, 2011
Maximum Dew Point 8.6 °C 13:11 9.2 °C 14.7 °C, 2015 2.4 °C, 2014
Mean Dew Point 6.6 °C 7.2 °C 10.7 °C, 2015 -0.2 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.5 °C * 03:11 7.4 °C 10.4 °C, 2025 1.9 °C, 2014
Day Maximum (09-21) 13.8 °C 15:45 15.9 °C 20.8 °C, 2025 8.7 °C, 2012
Max 10m Temp Rise 0.5 °C 13:28 0.6 °C 1.6 °C, 2013 0.2 °C, 2012
Max 1hr Temp Rise 1.4 °C 11:26 1.9 °C 6.6 °C, 2013 0.4 °C, 2012
Max 1hr Hum Rise 22% 18:05 17% 22%, 2019 2%, 2012
Max 10m Temp Fall 1.6 °C 17:27 0.9 °C 1.6 °C, 2019 0.1 °C, 2012
Max 1hr Temp Fall 3.4 °C 18:06 2.7 °C 3.5 °C, 2025 0.5 °C, 2012
Max 1hr Hum Fall 8% 12:05 9% 22%, 2013 2%, 2012
Max 10m Wind Speed 7.6 mph 21:42 7.8 mph 19.7 mph, 2021 5.8 mph, 2020
Minimum Feels-like 2.1 °C 21:37 4.3 °C 10.7 °C, 2022 -0.5 °C, 2014
Maximum Feels-like 14.1 °C 13:29 16.3 °C 21.9 °C, 2015 9.3 °C, 2012
Mean Feels-like 8.7 °C 11.1 °C 15.6 °C, 2015 5.4 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.6 °C (-1.4) 9.0 °C (+0.0) 17.0 °C (+8.0), 2013 1.4 °C (-7.6), 2012
Humidity Range 31% 37% 56%, 2025 4%, 2012
Pressure Range 4 hPa 4 hPa 26 hPa, 2021 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.4 [3%]6.9 hrs (40%) [17%] 13.3 [99%], 2013 0 [0%], 2012
Wet Hours 2
[Mean rain rate: 1.3 mm/h]		5 hrs (129%) [6.9%] 7, 2024 0, 2009
Cloud Cover Mostly Cloudy with periods of Overcast
Events None
Comments eve Showers
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 11.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 3rd May 2019.
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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Wind rose