Daily Report for 17th November 2012

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.9 °C (+1.8) 23:57 4.9 °C (-1.1) 12.3 °C (+7.2), 2015 0.2 °C (-4.9), 2017
Maximum Temperature 12.3 °C (+1.9) 08:37 10.6 °C (-0.5) 15.7 °C (+5.3), 2015 7.3 °C (-3.1), 2010
Mean Temperature 10.2 °C (+1.9) 7.9 °C (-0.8) 13.8 °C, 2015 4.4 °C, 2017
Minimum Humidity 78% 14:40 72% 90%, 2013 55%, 2009
Maximum Humidity 98% 05:11 94% 98%, 2011 79%, 2016
Mean Humidity 90% 85% 95%, 2014 73%, 2016
Minimum Pressure 1005 hPa 06:15 1005 hPa 1027 hPa, 2017 975 hPa, 2022
Maximum Pressure 1012 hPa 23:44 1014 hPa 1030 hPa, 2017 993 hPa, 2022
Mean Pressure 1008 hPa 1010 hPa 1029 hPa, 2017 984 hPa, 2022
Mean Wind Speed 3.1 mph (-1.5) 3.8 mph (-0.8) 10.8 mph, 2016 0.9 mph, 2013
Maximum Wind Speed 9.2 mph 10:19 11.4 mph 30.1 mph, 2015 5.4 mph, 2013
Maximum Gust 14.0 mph 10:20 16.3 mph 45.5 mph, 2015 7.1 mph, 2013
Mean Wind Direction W
Rainfall 0.6 mm 33.5 mm (88%) 7.3 mm, 2014
Maximum Hourly Rain 0.3 mm 09:13 3.5 mm, 2015
Maximum 10-min Rain 0.3 mm 09:13 1.6 mm, 2015
Maximum Rain Rate n/a 54, 2015
Minimum Dew Point 4.6 °C 23:52 2.9 °C 9.7 °C, 2020 -0.9 °C, 2017
Maximum Dew Point 11.8 °C 08:37 8.3 °C 13.9 °C, 2015 3.3 °C, 2017
Mean Dew Point 8.7 °C 5.5 °C 10.7 °C, 2020 1.5 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.4 °C * 21:00 5.6 °C 11.9 °C, 2015 0.2 °C, 2017
Day Maximum (09-21) 12.3 °C 09:10 10.4 °C 15.7 °C, 2015 7.3 °C, 2010
Max 10m Temp Rise 0.2 °C 02:44 0.4 °C 0.7 °C, 2019 0.1 °C, 2010
Max 1hr Temp Rise 0.6 °C 03:40 1.3 °C 2.4 °C, 2017 0.3 °C, 2010
Max 1hr Hum Rise 3% 15:40 5% 10%, 2017 2%, 2013
Max 10m Temp Fall 0.7 °C 10:28 0.4 °C 1.2 °C, 2016 0.1 °C, 2013
Max 1hr Temp Fall 1.4 °C 11:16 1.3 °C 2.8 °C, 2017 0.3 °C, 2013
Max 1hr Hum Fall 9% 12:14 8% 18%, 2019 2%, 2013
Max 10m Wind Speed 7.0 mph 05:44 8.2 mph 24.2 mph, 2015 3.6 mph, 2013
Minimum Feels-like 5.4 °C 23:20 2.7 °C 12.7 °C, 2015 -1.6 °C, 2017
Maximum Feels-like 14.5 °C 07:55 11.0 °C 19.0 °C, 2015 7.0 °C, 2010
Mean Feels-like 11.0 °C 7.0 °C 15.5 °C, 2015 3.6 °C, 2017
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.4 °C (+0.1) 5.7 °C (+0.6) 8.4 °C (+3.1), 2017 1.9 °C (-3.4), 2013
Humidity Range 20% 22% 36%, 2017 7%, 2013
Pressure Range 7 hPa 9 hPa 19 hPa, 2016 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]47 hrs (95%) [34%] 8 [103%], 2021 0 [0%], 2010
Wet Hours 1
[Mean rain rate: 0.6 mm/h]		23 hrs (63%) [5.5%] 11, 2014 0, 2009
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments 07-09 Light Rain/Showers
Extra Comments delayed rain tip at 2045 odd
Issues None known
Observer Absent? No
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 17th 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