Daily Report for 5th October 2011

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.8 °C (+6.1) 01:36 14.4 °C (+4.6) 15.8 °C (+6.1), 2011 3.6 °C (-6.1), 2014
Maximum Temperature 19.1 °C (+2.8) 14:01 23.4 °C (+6.9) 20.6 °C (+4.3), 2018 14.2 °C (-2.1), 2009
Mean Temperature 17.3 °C (+4.4) 18.6 °C (+5.8) 17.3 °C, 2011 9.6 °C, 2014
Minimum Humidity 65% 13:01 48% 80%, 2009 49%, 2025
Maximum Humidity 89% 07:07 87% 98%, 2014 76%, 2025
Mean Humidity 78% 69% 89%, 2010 64%, 2016
Minimum Pressure 1010 hPa 23:35 1018 hPa 1028 hPa, 2016 989 hPa, 2020
Maximum Pressure 1020 hPa 00:21 1023 hPa 1032 hPa, 2016 1000 hPa, 2020
Mean Pressure 1015 hPa 1020 hPa 1030 hPa, 2016 996 hPa, 2020
Mean Wind Speed 8.3 mph (+4.2) 5.0 mph (+0.9) 9.8 mph, 2022 1.1 mph, 2009
Maximum Wind Speed 19.4 mph 13.6 mph 22.1 mph, 2016 5.3 mph, 2009
Maximum Gust 27.7 mph 19:56 19.7 mph 35.7 mph, 2022 7.4 mph, 2009
Mean Wind Direction SW
Rainfall trace 0.1 mm (1%) 18.2, 2021
Maximum Hourly Rain n/a 11, 2021
Maximum 10-min Rain n/a 2.9, 2021
Maximum Rain Rate n/a 42, 2021
Minimum Dew Point 12.4 °C 06:58 10.5 °C 12.4 °C, 2011 3.0 °C, 2014
Maximum Dew Point 15.0 °C 23:51 15.1 °C 15.9 °C, 2015 8.6 °C, 2025
Mean Dew Point 13.4 °C 12.2 °C 13.6 °C, 2015 5.2 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.8 °C 01:36 14.4 °C 15.8 °C, 2011 3.6 °C, 2014
Day Maximum (09-21) 19.1 °C 13:05 23.4 °C 20.6 °C, 2018 14.2 °C, 2009
Max 10m Temp Rise 0.4 °C 08:35 0.7 °C 0.8 °C, 2014 0.2 °C, 2010
Max 1hr Temp Rise 1.0 °C 08:39 3.0 °C 3.5 °C, 2014 0.8 °C, 2010
Max 1hr Hum Rise 5% 06:40 9% 15%, 2020 4%, 2010
Max 10m Temp Fall 0.2 °C 17:36 0.3 °C 1.4 °C, 2017 0.1 °C, 2015
Max 1hr Temp Fall 0.8 °C 18:09 1.0 °C 3.9 °C, 2012 0.3 °C, 2015
Max 1hr Hum Fall 7% 08:45 7% 19%, 2012 1%, 2015
Max 10m Wind Speed 11.6 mph 21:26 8.9 mph 18.1 mph, 2022 5.0 mph, 2014
Minimum Feels-like 18.3 °C 00:54 16.3 °C 18.3 °C, 2011 0.0 °C, 2009
Maximum Feels-like 22.0 °C 12:48 25.9 °C 23.8 °C, 2018 0.0 °C, 2009
Mean Feels-like 20.3 °C 21.1 °C 20.3 °C, 2011 0.0 °C, 2009
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.3 °C (-3.3) 9.0 °C (+2.4) 11.3 °C (+4.7), 2014 3.0 °C (-3.6), 2009
Humidity Range 24% 39% 48%, 2014 14%, 2009
Pressure Range 10 hPa 5 hPa 15 hPa, 2025 3 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [10%]31 hrs (151%) [61%] 9.2 [90%], 2025 0 [0%], 2015
Wet Hours 0.20.2 hrs (3%) [0.2%] 13, 2012 0, 2013
Cloud Cover am: Mostly Cloudy with periods of Partly Cloudy
pm: Overcast or Mostly Cloudy
Events None
Comments 1730 Light Shower
Extra Comments
Issues Wind data loss at multiple times (generally overnight)
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 5th October 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