Daily Report for 3rd May 2011

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.2 °C (-2.1) 05:49 7.5 °C (+0.2) 10.2 °C (+2.9), 2022 1.9 °C (-5.4), 2014
Maximum Temperature 14.1 °C (-2.2) 14:56 15.8 °C (-0.5) 20.8 °C (+4.5), 2025 8.9 °C (-7.4), 2012
Mean Temperature 9.7 °C (-2.2) 11.7 °C (-0.2) 14.4 °C, 2025 6.8 °C, 2010
Minimum Humidity 29% 16:45 34% 90%, 2012 29%, 2011
Maximum Humidity 78% 06:35 71% 95%, 2015 71%, 2009
Mean Humidity 53% 52% 92%, 2012 49%, 2013
Minimum Pressure 1014 hPa 00:37 1011 hPa 1026 hPa, 2014 994 hPa, 2015
Maximum Pressure 1021 hPa 22:36 1016 hPa 1030 hPa, 2014 1003 hPa, 2015
Mean Pressure 1018 hPa 1014 hPa 1028 hPa, 2014 998 hPa, 2015
Mean Wind Speed 6.5 mph (+1.8) 8.7 mph (+4.0) 10.2 mph, 2021 2.1 mph, 2020
Maximum Wind Speed 13.8 mph 17.3 mph 24.7 mph, 2021 7.8 mph, 2014
Maximum Gust 21.5 mph 10:46 26.9 mph 37.6 mph, 2021 10.7 mph, 2014
Mean Wind Direction ENE
Rainfall 0.0 mm 0.0 mm (0%) 6.6 mm, 2024
Maximum Hourly Rain n/a 2.5, 2017
Maximum 10-min Rain n/a 1.7, 2017
Maximum Rain Rate n/a 36, 2017
Minimum Dew Point -4.2 °C 17:50 -1.9 °C 8.1 °C, 2024 -4.2 °C, 2011
Maximum Dew Point 4.5 °C 08:01 5.1 °C 14.7 °C, 2015 2.4 °C, 2014
Mean Dew Point -0.2 °C 1.7 °C 10.7 °C, 2015 -0.2 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 5.2 °C 05:50 8.2 °C 10.4 °C, 2025 1.9 °C, 2014
Day Maximum (09-21) 14.1 °C 15:00 15.8 °C 20.8 °C, 2025 8.7 °C, 2012
Max 10m Temp Rise 0.9 °C 07:53 0.6 °C 1.6 °C, 2013 0.2 °C, 2012
Max 1hr Temp Rise 3.2 °C 08:03 2.3 °C 6.6 °C, 2013 0.4 °C, 2012
Max 1hr Hum Rise 8% 21:58 8% 22%, 2019 2%, 2012
Max 10m Temp Fall 0.9 °C 18:57 0.6 °C 1.6 °C, 2019 0.1 °C, 2012
Max 1hr Temp Fall 1.3 °C 20:30 1.6 °C 3.5 °C, 2025 0.5 °C, 2012
Max 1hr Hum Fall 12% 10:25 11% 22%, 2013 2%, 2012
Max 10m Wind Speed 10.2 mph 11:22 12.3 mph 19.7 mph, 2021 5.8 mph, 2020
Minimum Feels-like 2.3 °C 05:53 5.4 °C 10.7 °C, 2022 -0.5 °C, 2014
Maximum Feels-like 14.1 °C 14:55 15.8 °C 21.9 °C, 2015 9.3 °C, 2012
Mean Feels-like 8.8 °C 11.1 °C 15.6 °C, 2015 5.4 °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 8.9 °C (-0.1) 8.3 °C (-0.7) 17.0 °C (+8.0), 2013 1.4 °C (-7.6), 2012
Humidity Range 49% 37% 56%, 2025 4%, 2012
Pressure Range 7 hPa 4 hPa 26 hPa, 2021 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 13 [96%]37 hrs (213%) [91%] 13.3 [99%], 2013 0 [0%], 2012
Wet Hours 00 hrs (0%) [0%] 7, 2024 0, 2009
Cloud Cover am: Mostly Sunny or Sunny
pm: Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 3rd May 2011.
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

daycamsumdaycamsum2

Wind rose