Daily Report for 4th November 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.3 °C (-5.3) 01:58 3.1 °C (-3.5) 15.0 °C (+8.4), 2010 1.3 °C (-5.3), 2012
Maximum Temperature 8.4 °C (-3.5) 12:43 9.8 °C (-2.2) 18.1 °C (+6.2), 2010 8.4 °C (-3.5), 2012
Mean Temperature 4.7 °C (-4.4) 6.2 °C (-2.9) 16.2 °C, 2010 4.7 °C, 2012
Minimum Humidity 79% 00:09 64% 90%, 2015 62%, 2013
Maximum Humidity 98% 10:59 93% 98%, 2012 81%, 2016
Mean Humidity 92% 81% 93%, 2023 77%, 2016
Minimum Pressure 986 hPa 11:09 985 hPa 1028 hPa, 2020 965 hPa, 2023
Maximum Pressure 1000 hPa 00:08 996 hPa 1040 hPa, 2020 985 hPa, 2023
Mean Pressure 994 hPa 990 hPa 1034 hPa, 2020 971 hPa, 2023
Mean Wind Speed 3.3 mph (-1.3) 4.8 mph (+0.2) 8.9 mph, 2010 0.8 mph, 2020
Maximum Wind Speed 15.4 mph 13:43 15.4 mph 17.6 mph, 2010 1.7 mph, 2020
Maximum Gust 22.5 mph 13:42 24.4 mph 26.5 mph, 2023 4.0 mph, 2020
Mean Wind Direction N
Rainfall 17.3 mm 27.9 mm (312%) 17.3 mm, 2012
Maximum Hourly Rain 5.5 mm 09:49 5.5 mm, 2012
Maximum 10-min Rain 2.0 mm 09:44 2.0 mm, 2012
Maximum Rain Rate 30 mm/h 09:42 30 mm/h, 2012
Minimum Dew Point -1.1 °C 00:42 0.0 °C 11.6 °C, 2010 -1.1 °C, 2012
Maximum Dew Point 7.9 °C 12:12 6.5 °C 13.4 °C, 2015 6.0 °C, 2020
Mean Dew Point 3.5 °C 3.1 °C 12.3 °C, 2010 3.3 °C, 2020
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.3 °C 01:58 3.7 °C 15.0 °C, 2010 1.3 °C, 2012
Day Maximum (09-21) 8.4 °C 12:43 9.3 °C 18.1 °C, 2010 8.4 °C, 2012
Max 10m Temp Rise 0.3 °C 03:26 0.4 °C 0.9 °C, 2009 0.2 °C, 2010
Max 1hr Temp Rise 1.1 °C 03:54 1.7 °C 2.3 °C, 2020 0.6 °C, 2017
Max 1hr Hum Rise 5% 01:43 6% 18%, 2009 1%, 2015
Max 10m Temp Fall 0.6 °C 13:38 0.6 °C 1.0 °C, 2009 0.2 °C, 2010
Max 1hr Temp Fall 2.0 °C 13:54 1.8 °C 2.8 °C, 2009 0.3 °C, 2015
Max 1hr Hum Fall 3% 13:13 10% 12%, 2014 2%, 2015
Max 10m Wind Speed 11.9 mph 13:44 11.3 mph 11.9 mph, 2012 0.2 mph, 2020
Minimum Feels-like 0.6 °C 14:58 0.5 °C 17.1 °C, 2010 0.0 °C, 2013
Maximum Feels-like 8.7 °C 12:08 9.8 °C 20.8 °C, 2010 8.6 °C, 2021
Mean Feels-like 3.2 °C 4.3 °C 18.6 °C, 2010 3.2 °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 7.1 °C (+1.8) 6.7 °C (+1.4) 9.2 °C (+3.9), 2020 2.4 °C (-2.9), 2024
Humidity Range 19% 29% 36%, 2013 5%, 2015
Pressure Range 14 hPa 10 hPa 19 hPa, 2023 3 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.2 [2%]14 hrs (114%) [40%] 8 [95%], 2020 0.1 [1%], 2015
Wet Hours 6
[Mean rain rate: 2.9 mm/h]		11 hrs (132%) [12%] 8, 2011 0, 2009
Cloud Cover Overcast
Events None
Comments 05-1030 Moderate Rain, 13 Light Shower
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 4th November 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsum

Wind rose