Daily Report for 8th May 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.7 °C (+0.7) 06:28 6.1 °C (-1.5) 14.6 °C (+6.6), 2011 6.7 °C (-1.3), 2010
Maximum Temperature 14.9 °C (-2.0) 16:41 14.1 °C (-2.5) 26.8 °C (+9.9), 2018 9.4 °C (-7.5), 2010
Mean Temperature 10.7 °C (-0.6) 10.0 °C (-2.0) 20.1 °C, 2016 7.9 °C, 2010
Minimum Humidity 58% 00:11 52% 79%, 2023 27%, 2016
Maximum Humidity 94% 09:14 88% 96%, 2024 67%, 2016
Mean Humidity 84% 72% 87%, 2023 45%, 2016
Minimum Pressure 992 hPa 14:08 1013 hPa 1029 hPa, 2024 992 hPa, 2019
Maximum Pressure 1007 hPa 00:00 1020 hPa 1031 hPa, 2022 1007 hPa, 2019
Mean Pressure 995 hPa 1016 hPa 1030 hPa, 2024 995 hPa, 2019
Mean Wind Speed 5.6 mph (+0.9) 3.5 mph (-1.2) 8.4 mph, 2021 2.0 mph, 2020
Maximum Wind Speed 19.4 mph 14:41 12.9 mph 21.6 mph, 2021 8.2 mph, 2020
Maximum Gust 32.3 mph 12:58 21.0 mph 34.2 mph, 2021 12.7 mph, 2024
Mean Wind Direction S
Rainfall 13.6 mm 22.8 mm (192%) 13.6 mm, 2019
Maximum Hourly Rain 3.5 mm 17:54 3.5 mm, 2019
Maximum 10-min Rain 1.8 mm 17:52 1.8 mm, 2019
Maximum Rain Rate 26 mm/h 17:50 26 mm/h, 2019
Minimum Dew Point 3.1 °C 00:18 2.2 °C 9.0 °C, 2023 -1.7 °C, 2021
Maximum Dew Point 10.3 °C 13:59 7.0 °C 14.2 °C, 2011 5.4 °C, 2017
Mean Dew Point 7.9 °C 5.0 °C 11.2 °C, 2023 3.4 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.7 °C 06:26 6.3 °C 15.0 °C, 2011 6.7 °C, 2010
Day Maximum (09-21) 14.9 °C 16:42 14.1 °C 26.8 °C, 2018 9.4 °C, 2010
Max 10m Temp Rise 1.0 °C 13:47 0.8 °C 1.0 °C, 2018 0.2 °C, 2010
Max 1hr Temp Rise 3.6 °C 14:23 2.5 °C 5.0 °C, 2020 0.9 °C, 2010
Max 1hr Hum Rise 19% 17:49 14% 23%, 2021 3%, 2017
Max 10m Temp Fall 1.4 °C 15:12 0.9 °C 1.4 °C, 2019 0.2 °C, 2010
Max 1hr Temp Fall 3.1 °C 17:46 2.3 °C 3.3 °C, 2020 0.7 °C, 2010
Max 1hr Hum Fall 20% 14:46 13% 27%, 2009 4%, 2010
Max 10m Wind Speed 14.5 mph 14:50 9.1 mph 17.8 mph, 2021 6.0 mph, 2022
Minimum Feels-like 4.9 °C 06:11 3.1 °C 15.0 °C, 2011 3.4 °C, 2017
Maximum Feels-like 15.9 °C 16:40 14.4 °C 29.9 °C, 2018 8.1 °C, 2010
Mean Feels-like 10.5 °C 9.5 °C 20.3 °C, 2016 6.1 °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 6.2 °C (-2.7) 8.0 °C (-0.9) 17.1 °C (+8.2), 2018 2.7 °C (-6.2), 2010
Humidity Range 36% 36% 57%, 2018 12%, 2017
Pressure Range 15 hPa 8 hPa 15 hPa, 2019 3 hPa, 2024
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.5 [18%]30 hrs (64%) [27%] 13 [94%], 2016 0 [0%], 2010
Wet Hours 11
[Mean rain rate: 1.2 mm/h]
18 hrs (174%) [9.4%] 11, 2019 0, 2016
Cloud Cover am: Overcast
pm: Partly Cloudy transitioned to Mostly Cloudy
Events None
Comments Rain
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 12.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 8th 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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