Daily Report for 5th May 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.6 °C (-2.1) 07:07 7.9 °C (+0.3) 12.6 °C (+4.9), 2023 2.5 °C (-5.2), 2010
Maximum Temperature 9.8 °C (-6.8) 17:42 11.7 °C (-4.8) 22.2 °C (+5.6), 2018 9.8 °C (-6.8), 2012
Mean Temperature 7.2 °C (-4.5) 9.4 °C (-2.3) 15.6 °C, 2023 7.1 °C, 2021
Minimum Humidity 51% 17:53 69% 60%, 2022 28%, 2016
Maximum Humidity 88% 02:07 94% 98%, 2024 67%, 2016
Mean Humidity 72% 85% 78%, 2024 41%, 2016
Minimum Pressure 1008 hPa 01:34 1010 hPa 1025 hPa, 2018 988 hPa, 2015
Maximum Pressure 1012 hPa 22:25 1016 hPa 1028 hPa, 2019 1002 hPa, 2015
Mean Pressure 1010 hPa 1013 hPa 1026 hPa, 2018 994 hPa, 2015
Mean Wind Speed 6.4 mph (+1.7) 4.4 mph (-0.3) 11.6 mph, 2015 2.4 mph, 2010
Maximum Wind Speed 12.1 mph 11.0 mph 25.5 mph, 2015 7.5 mph, 2010
Maximum Gust 17.5 mph 02:46 15.8 mph 42.0 mph, 2015 10.6 mph, 2010
Mean Wind Direction NE
Rainfall 0.3 mm 18.2 mm (245%) 4.3 mm, 2021
Maximum Hourly Rain 0.3 mm 23:04 3.4 mm, 2021
Maximum 10-min Rain 0.3 mm 23:04 1.5 mm, 2021
Maximum Rain Rate n/a 23:05 10.8, 2015
Minimum Dew Point -0.1 °C 18:32 5.1 °C 10.3 °C, 2023 -3.7 °C, 2016
Maximum Dew Point 5.5 °C 01:05 9.1 °C 13.9 °C, 2015 3.6 °C, 2019
Mean Dew Point 2.3 °C 6.9 °C 11.5 °C, 2023 0.7 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 5.6 °C 07:06 8.1 °C 12.6 °C, 2023 2.5 °C, 2010
Day Maximum (09-21) 9.8 °C 17:42 11.7 °C 22.2 °C, 2018 9.8 °C, 2012
Max 10m Temp Rise 0.3 °C 11:05 0.4 °C 1.3 °C, 2018 0.3 °C, 2012
Max 1hr Temp Rise 1.2 °C 14:42 1.1 °C 4.8 °C, 2018 1.2 °C, 2012
Max 1hr Hum Rise 7% 21:29 8% 23%, 2021 4%, 2011
Max 10m Temp Fall 0.3 °C 18:23 0.3 °C 0.8 °C, 2021 0.3 °C, 2010
Max 1hr Temp Fall 1.0 °C 18:46 1.3 °C 3.3 °C, 2021 1.0 °C, 2012
Max 1hr Hum Fall 10% 16:32 9% 22%, 2018 7%, 2013
Max 10m Wind Speed 9.3 mph 04:59 7.6 mph 18.9 mph, 2015 5.8 mph, 2019
Minimum Feels-like 1.6 °C 06:59 6.1 °C 14.1 °C, 2023 -1.3 °C, 2019
Maximum Feels-like 9.3 °C 17:44 12.4 °C 22.8 °C, 2018 9.3 °C, 2012
Mean Feels-like 4.9 °C 8.9 °C 17.6 °C, 2023 4.9 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.2 °C (-4.7) 3.8 °C (-5.1) 15.1 °C (+6.2), 2018 4.1 °C (-4.8), 2015
Humidity Range 37% 25% 56%, 2018 28%, 2013
Pressure Range 4 hPa 6 hPa 14 hPa, 2015 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]2.1 hrs (7%) [3.1%] 13.7 [100%], 2018 0.1 [1%], 2012
Wet Hours 212 hrs (180%) [9.7%] 2, 2012 0, 2010
Cloud Cover am: Overcast
pm: Overcast transitioned to Mostly Cloudy
Events None
Comments 12-14, 23- Slight/Light Rain
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 5th May 2012.
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