Daily Report for 16th May 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.9 °C (-6.1) 05:41 6.7 °C (-1.4) 15.7 °C (+6.7), 2017 2.9 °C (-6.1), 2013
Maximum Temperature 16.1 °C (-1.6) 13:32 16.6 °C (-0.4) 24.4 °C (+6.7), 2017 14.3 °C (-3.4), 2012
Mean Temperature 10.0 °C (-3.9) 11.9 °C (-0.9) 19.2 °C, 2017 9.9 °C, 2012
Minimum Humidity 36% 13:35 40% 76%, 2024 35%, 2019
Maximum Humidity 92% 07:05 84% 96%, 2024 79%, 2020
Mean Humidity 68% 62% 87%, 2024 60%, 2012
Minimum Pressure 998 hPa 15:03 1009 hPa 1028 hPa, 2014 996 hPa, 2021
Maximum Pressure 1001 hPa 15:30 1016 hPa 1036 hPa, 2014 1001 hPa, 2013
Mean Pressure 1000 hPa 1012 hPa 1032 hPa, 2014 999 hPa, 2021
Mean Wind Speed 2.4 mph (-2.3) 5.8 mph (+1.1) 7.5 mph, 2009 0.8 mph, 2014
Maximum Wind Speed 10.2 mph 16:35 15.4 mph 17.2 mph, 2019 7.6 mph, 2014
Maximum Gust 14.3 mph 16:36 22.5 mph 30.0 mph, 2009 8.5 mph, 2014
Mean Wind Direction SSE
Rainfall 1.1 mm 19.3 mm (81%) 8.8 mm, 2010
Maximum Hourly Rain 1.1 mm 17:48 6.3 mm, 2010
Maximum 10-min Rain 0.9 mm 17:48 2.7 mm, 2010
Maximum Rain Rate 6 mm/h 17:44 60 mm/h, 2010
Minimum Dew Point 0.9 °C 07:32 1.0 °C 11.9 °C, 2017 -0.6 °C, 2012
Maximum Dew Point 7.6 °C 07:53 8.0 °C 15.9 °C, 2017 4.1 °C, 2012
Mean Dew Point 3.7 °C 4.2 °C 13.5 °C, 2017 1.9 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.9 °C 05:41 7.0 °C 15.7 °C, 2017 2.9 °C, 2013
Day Maximum (09-21) 16.1 °C 13:32 16.6 °C 24.4 °C, 2017 14.3 °C, 2012
Max 10m Temp Rise 1.1 °C 07:09 0.9 °C 1.1 °C, 2013 0.4 °C, 2011
Max 1hr Temp Rise 5.2 °C 07:45 3.0 °C 5.2 °C, 2013 1.5 °C, 2016
Max 1hr Hum Rise 17% 18:00 11% 28%, 2009 4%, 2024
Max 10m Temp Fall 0.5 °C 00:15 0.6 °C 0.8 °C, 2020 0.4 °C, 2017
Max 1hr Temp Fall 2.0 °C 01:05 2.2 °C 3.2 °C, 2020 1.0 °C, 2024
Max 1hr Hum Fall 14% 08:17 16% 23%, 2009 4%, 2010
Max 10m Wind Speed 6.6 mph 16:39 11.3 mph 13.8 mph, 2022 4.1 mph, 2014
Minimum Feels-like 2.1 °C 06:49 4.7 °C 18.4 °C, 2017 0.8 °C, 2012
Maximum Feels-like 16.1 °C 13:31 16.7 °C 27.5 °C, 2017 14.3 °C, 2012
Mean Feels-like 9.9 °C 11.5 °C 22.3 °C, 2017 9.2 °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 13.2 °C (+4.5) 9.9 °C (+1.0) 13.9 °C (+5.2), 2014 6.5 °C (-2.2), 2021
Humidity Range 56% 43% 56%, 2013 20%, 2024
Pressure Range 3 hPa 7 hPa 10 hPa, 2019 2 hPa, 2024
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6.5 [46%]96 hrs (101%) [43%] 12 [85%], 2019 0 [0%], 2024
Wet Hours 1
[Mean rain rate: 1.1 mm/h]
25 hrs (123%) [6.6%] 4, 2021 0, 2011
Cloud Cover am: Mostly Sunny transitioned to Partly Cloudy
pm: Mostly Cloudy
Events None
Comments 17 Moderate Shower
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 16th May 2013.
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