Daily Report for 30th May 2013

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.7 °C (-0.1) 05:45 7.3 °C (-1.8) 15.4 °C (+4.6), 2025 5.2 °C (-5.6), 2022
Maximum Temperature 15.1 °C (-4.2) 14:15 15.7 °C (-2.1) 25.4 °C (+6.1), 2012 15.1 °C (-4.2), 2013
Mean Temperature 12.2 °C (-2.1) 11.6 °C (-1.9) 19.8 °C, 2025 10.7 °C, 2022
Minimum Humidity 78% 14:42 48% 80%, 2018 30%, 2009
Maximum Humidity 97% 07:46 85% 97%, 2013 81%, 2015
Mean Humidity 90% 67% 90%, 2018 55%, 2015
Minimum Pressure 1007 hPa 06:30 1008 hPa 1030 hPa, 2023 1006 hPa, 2010
Maximum Pressure 1016 hPa 23:08 1015 hPa 1032 hPa, 2023 1013 hPa, 2011
Mean Pressure 1010 hPa 1012 hPa 1031 hPa, 2023 1010 hPa, 2011
Mean Wind Speed 4.4 mph (-0.3) 5.0 mph (+0.3) 8.1 mph, 2019 1.6 mph, 2018
Maximum Wind Speed 9.7 mph 20:33 13.4 mph 19.1 mph, 2019 7.0 mph, 2018
Maximum Gust 14.7 mph 19:26 19.4 mph 27.6 mph, 2019 12.7 mph, 2018
Mean Wind Direction N
Rainfall 5.1 mm 49.1 mm (110%) 5.1 mm, 2013
Maximum Hourly Rain 2.0 mm 04:13 2.0 mm, 2013
Maximum 10-min Rain 0.6 mm 04:35 0.6 mm, 2013
Maximum Rain Rate 2.8 mm/h 03:46 2.8 mm/h, 2013
Minimum Dew Point 9.4 °C 23:04 2.0 °C 12.3 °C, 2025 1.2 °C, 2015
Maximum Dew Point 12.0 °C 13:20 8.2 °C 17.0 °C, 2018 6.3 °C, 2015
Mean Dew Point 10.5 °C 5.1 °C 13.9 °C, 2018 3.3 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.7 °C 05:45 7.5 °C 15.4 °C, 2025 5.2 °C, 2022
Day Maximum (09-21) 15.1 °C 14:15 15.6 °C 25.4 °C, 2012 15.1 °C, 2013
Max 10m Temp Rise 0.5 °C 12:30 0.8 °C 0.9 °C, 2009 0.4 °C, 2014
Max 1hr Temp Rise 1.4 °C 14:11 2.5 °C 3.5 °C, 2022 1.2 °C, 2016
Max 1hr Hum Rise 4% 15:48 10% 22%, 2012 4%, 2013
Max 10m Temp Fall 0.4 °C 14:45 0.6 °C 1.0 °C, 2012 0.2 °C, 2016
Max 1hr Temp Fall 1.0 °C 15:11 2.0 °C 3.2 °C, 2012 0.9 °C, 2016
Max 1hr Hum Fall 9% 14:28 13% 20%, 2012 6%, 2023
Max 10m Wind Speed 7.9 mph 14:09 9.7 mph 12.6 mph, 2019 4.9 mph, 2018
Minimum Feels-like 11.9 °C 04:57 5.4 °C 17.8 °C, 2025 2.2 °C, 2022
Maximum Feels-like 17.4 °C 14:11 16.1 °C 27.9 °C, 2025 15.8 °C, 2022
Mean Feels-like 13.7 °C 11.4 °C 23.0 °C, 2025 10.9 °C, 2022
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.4 °C (-4.1) 8.4 °C (-0.3) 14.3 °C (+5.8), 2020 4.4 °C (-4.1), 2013
Humidity Range 19% 37% 60%, 2009 15%, 2018
Pressure Range 9 hPa 7 hPa 10 hPa, 2010 1 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]141 hrs (77%) [33%] 14.8 [100%], 2020 0 [0%], 2014
Wet Hours 5
[Mean rain rate: 1.0 mm/h]		54 hrs (139%) [7.5%] 5, 2013 0, 2009
Cloud Cover Overcast
Events None
Comments 03-08 Light Rain, occasional pm Slight Showers
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 30th 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose