Daily Report for 15th October 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.1 °C (-5.6) 04:28 7.2 °C (-2.1) 11.9 °C (+3.2), 2014 2.5 °C (-6.2), 2023
Maximum Temperature 13.3 °C (-1.6) 15:00 14.0 °C (-1.6) 19.0 °C (+4.1), 2017 9.8 °C (-5.1), 2023
Mean Temperature 8.9 °C (-3.6) 10.9 °C (-1.8) 14.9 °C, 2017 6.3 °C, 2023
Minimum Humidity 59% 15:22 64% 95%, 2018 49%, 2011
Maximum Humidity 94% 05:56 95% 98%, 2017 85%, 2016
Mean Humidity 82% 83% 96%, 2018 71%, 2009
Minimum Pressure 999 hPa 23:16 1005 hPa 1031 hPa, 2009 999 hPa, 2012
Maximum Pressure 1004 hPa 03:45 1013 hPa 1034 hPa, 2009 1004 hPa, 2012
Mean Pressure 1002 hPa 1009 hPa 1032 hPa, 2009 1002 hPa, 2012
Mean Wind Speed 3.9 mph (-0.2) 4.0 mph (-0.1) 5.9 mph, 2022 1.6 mph, 2011
Maximum Wind Speed 12.5 mph 14:52 11.3 mph 19.5 mph, 2022 6.9 mph, 2011
Maximum Gust 18.7 mph 15:20 16.7 mph 32.3 mph, 2022 10.2 mph, 2011
Mean Wind Direction SW
Rainfall 0.9 mm 57.0 mm (181%) 10.3 mm, 2018
Maximum Hourly Rain 0.9 mm 23:53 7.2 mm, 2016
Maximum 10-min Rain 0.6 mm 23:39 2.2 mm, 2016
Maximum Rain Rate 2.1 mm/h 23:38 48 mm/h, 2016
Minimum Dew Point 1.8 °C 04:28 5.2 °C 11.3 °C, 2014 1.0 °C, 2023
Maximum Dew Point 9.7 °C 23:53 11.1 °C 14.7 °C, 2017 4.9 °C, 2023
Mean Dew Point 5.8 °C 7.9 °C 12.7 °C, 2017 3.0 °C, 2023
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.1 °C 04:28 7.8 °C 12.3 °C, 2021 3.1 °C, 2012
Day Maximum (09-21) 13.3 °C 15:06 14.0 °C 19.0 °C, 2017 9.8 °C, 2023
Max 10m Temp Rise 0.6 °C 08:21 0.6 °C 0.8 °C, 2011 0.2 °C, 2010
Max 1hr Temp Rise 1.9 °C 09:11 2.0 °C 3.3 °C, 2011 0.5 °C, 2018
Max 1hr Hum Rise 8% 16:22 6% 11%, 2022 1%, 2018
Max 10m Temp Fall 0.6 °C 00:10 0.5 °C 0.9 °C, 2020 0.1 °C, 2015
Max 1hr Temp Fall 2.2 °C 00:55 1.5 °C 2.5 °C, 2023 0.3 °C, 2018
Max 1hr Hum Fall 13% 15:19 11% 14%, 2022 1%, 2018
Max 10m Wind Speed 9.2 mph 15:14 8.3 mph 13.9 mph, 2022 4.4 mph, 2011
Minimum Feels-like 0.9 °C 04:58 6.1 °C 13.8 °C, 2014 0.0 °C, 2009
Maximum Feels-like 13.6 °C 14:37 15.5 °C 22.6 °C, 2017 0.0 °C, 2009
Mean Feels-like 8.7 °C 11.4 °C 17.6 °C, 2017 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 10.2 °C (+4.0) 6.9 °C (+0.5) 10.4 °C (+4.2), 2011 2.9 °C (-3.3), 2015
Humidity Range 35% 31% 43%, 2011 2%, 2018
Pressure Range 5 hPa 7 hPa 11 hPa, 2024 2 hPa, 2025
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.8 [8%]54 hrs (91%) [36%] 9.6 [100%], 2011 0 [0%], 2010
Wet Hours 1.5
[Mean rain rate: 0.6 mm/h]		48 hrs (202%) [13%] 6, 2014 0, 2009
Cloud Cover Mostly Cloudy
Events None
Comments 1530, 17 Showers; 2230- Light-Moderate Rain
Extra Comments 17 Rainbow
Issues None known
Observer Absent? No
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 15th October 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