Daily Report for 12th October 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.6 °C (+0.5) 06:36 10.2 °C (+0.7) 14.7 °C (+5.6), 2011 4.4 °C (-4.7), 2022
Maximum Temperature 16.5 °C (+1.1) 16:17 16.3 °C (+0.3) 20.9 °C (+5.5), 2018 12.6 °C (-2.8), 2019
Mean Temperature 13.0 °C (+0.8) 13.5 °C (+0.5) 18.1 °C, 2018 9.4 °C, 2020
Minimum Humidity 61% 15:23 65% 93%, 2023 48%, 2012
Maximum Humidity 94% 07:02 90% 98%, 2013 83%, 2016
Mean Humidity 81% 79% 95%, 2023 72%, 2018
Minimum Pressure 1013 hPa 00:15 1014 hPa 1032 hPa, 2025 998 hPa, 2012
Maximum Pressure 1022 hPa 22:45 1021 hPa 1035 hPa, 2025 1009 hPa, 2012
Mean Pressure 1019 hPa 1018 hPa 1033 hPa, 2025 1005 hPa, 2012
Mean Wind Speed 5.5 mph (+1.4) 6.0 mph (+1.9) 10.5 mph, 2018 1.5 mph, 2025
Maximum Wind Speed 13.2 mph 15:12 13.9 mph 23.8 mph, 2018 7.5 mph, 2025
Maximum Gust 19.6 mph 13:51 22.1 mph 35.7 mph, 2018 11.5 mph, 2025
Mean Wind Direction SW
Rainfall 0.0 mm 2.7 mm (11%) 9.0 mm, 2019
Maximum Hourly Rain n/a 3, 2014
Maximum 10-min Rain n/a 1.9, 2013
Maximum Rain Rate n/a 54, 2013
Minimum Dew Point 8.5 °C 06:25 7.7 °C 11.6 °C, 2023 2.5 °C, 2012
Maximum Dew Point 11.5 °C 12:12 12.1 °C 15.4 °C, 2023 7.9 °C, 2015
Mean Dew Point 9.7 °C 9.8 °C 13.6 °C, 2023 5.6 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.6 °C 06:36 10.8 °C 14.7 °C, 2011 4.4 °C, 2022
Day Maximum (09-21) 16.5 °C 16:17 16.3 °C 20.9 °C, 2018 12.6 °C, 2019
Max 10m Temp Rise 0.4 °C 10:10 0.5 °C 0.9 °C, 2022 0.2 °C, 2019
Max 1hr Temp Rise 1.8 °C 11:02 1.5 °C 3.8 °C, 2022 0.5 °C, 2019
Max 1hr Hum Rise 6% 18:36 7% 9%, 2016 2%, 2019
Max 10m Temp Fall 0.3 °C 19:04 0.5 °C 0.5 °C, 2013 0.2 °C, 2018
Max 1hr Temp Fall 1.1 °C 20:10 1.4 °C 2.0 °C, 2013 0.4 °C, 2018
Max 1hr Hum Fall 7% 10:50 8% 18%, 2012 2%, 2019
Max 10m Wind Speed 9.9 mph 15:17 10.5 mph 17.5 mph, 2018 5.1 mph, 2025
Minimum Feels-like 7.3 °C 07:03 9.7 °C 16.7 °C, 2011 4.3 °C, 2022
Maximum Feels-like 17.8 °C 16:59 18.3 °C 24.1 °C, 2018 12.8 °C, 2015
Mean Feels-like 14.0 °C 14.7 °C 20.8 °C, 2018 9.6 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.9 °C (+0.6) 6.1 °C (-0.4) 11.9 °C (+5.6), 2022 1.8 °C (-4.5), 2019
Humidity Range 33% 25% 49%, 2012 4%, 2023
Pressure Range 9 hPa 7 hPa 14 hPa, 2020 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7 [71%]41 hrs (85%) [34%] 7 [71%], 2017 0 [0%], 2019
Wet Hours 03.5 hrs (18%) [1.2%] 16, 2019 0, 2009
Cloud Cover am: Hazy transitioned to Partly Cloudy
pm: Mostly Sunny
Events None
Comments -
Extra Comments
Issues false tip reassigned to yest
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 12th October 2017.
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.
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Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose