Daily Report for 8th May 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.9 °C (-1.1) 23:52 8.0 °C (+0.3) 14.6 °C (+6.6), 2011 6.7 °C (-1.3), 2010
Maximum Temperature 12.0 °C (-4.9) 16:01 14.3 °C (-2.3) 26.8 °C (+9.9), 2018 9.4 °C (-7.5), 2010
Mean Temperature 9.4 °C (-3.0) 10.8 °C (-1.0) 20.1 °C, 2016 7.9 °C, 2010
Minimum Humidity 62% 10:12 57% 79%, 2023 27%, 2016
Maximum Humidity 74% 23:17 82% 96%, 2024 67%, 2016
Mean Humidity 66% 71% 87%, 2023 45%, 2016
Minimum Pressure 1025 hPa 03:35 1016 hPa 1029 hPa, 2024 992 hPa, 2019
Maximum Pressure 1029 hPa 22:51 1023 hPa 1031 hPa, 2022 1007 hPa, 2019
Mean Pressure 1027 hPa 1019 hPa 1030 hPa, 2024 995 hPa, 2019
Mean Wind Speed 5.4 mph (+0.7) 5.0 mph (+0.3) 8.4 mph, 2021 2.0 mph, 2020
Maximum Wind Speed 12.3 mph 13:07 11.7 mph 21.6 mph, 2021 8.2 mph, 2020
Maximum Gust 22.0 mph 06:47 18.9 mph 34.2 mph, 2021 12.7 mph, 2024
Mean Wind Direction NNE
Rainfall 0.0 mm 7.4 mm (62%) 13.6 mm, 2019
Maximum Hourly Rain n/a 3.5, 2019
Maximum 10-min Rain n/a 1.8, 2019
Maximum Rain Rate n/a 26, 2019
Minimum Dew Point 0.8 °C 04:39 3.6 °C 9.0 °C, 2023 -1.7 °C, 2021
Maximum Dew Point 5.4 °C 15:59 7.6 °C 14.2 °C, 2011 5.4 °C, 2017
Mean Dew Point 3.4 °C 5.6 °C 11.2 °C, 2023 3.4 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 7.4 °C * 04:58 8.1 °C 15.0 °C, 2011 6.7 °C, 2010
Day Maximum (09-21) 12.0 °C 16:01 14.3 °C 26.8 °C, 2018 9.4 °C, 2010
Max 10m Temp Rise 0.3 °C 13:19 0.6 °C 1.0 °C, 2018 0.2 °C, 2010
Max 1hr Temp Rise 1.0 °C 13:25 1.7 °C 5.0 °C, 2020 0.9 °C, 2010
Max 1hr Hum Rise 3% 06:07 8% 23%, 2021 3%, 2017
Max 10m Temp Fall 0.3 °C 01:52 0.4 °C 1.4 °C, 2019 0.2 °C, 2010
Max 1hr Temp Fall 1.1 °C 21:04 1.2 °C 3.3 °C, 2020 0.7 °C, 2010
Max 1hr Hum Fall 5% 01:44 10% 27%, 2009 4%, 2010
Max 10m Wind Speed 9.1 mph 13:08 8.8 mph 17.8 mph, 2021 6.0 mph, 2022
Minimum Feels-like 3.4 °C 04:18 5.2 °C 15.0 °C, 2011 3.4 °C, 2017
Maximum Feels-like 12.0 °C 15:59 14.4 °C 29.9 °C, 2018 8.1 °C, 2010
Mean Feels-like 7.9 °C 10.0 °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 5.1 °C (-3.8) 6.4 °C (-2.6) 17.1 °C (+8.2), 2018 2.7 °C (-6.2), 2010
Humidity Range 12% 25% 57%, 2018 12%, 2017
Pressure Range 4 hPa 7 hPa 15 hPa, 2019 3 hPa, 2024
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]23 hrs (50%) [21%] 13 [94%], 2016 0 [0%], 2010
Wet Hours 05 hrs (48%) [2.6%] 11, 2019 0, 2016
Cloud Cover Overcast
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 8th May 2017.
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

daycamsumLarge resolution version

Wind rose