Daily Report for 17th February 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.3 °C (-0.5) 07:19 1.5 °C (-1.4) 10.9 °C (+8.1), 2023 -0.3 °C (-3.1), 2010
Maximum Temperature 7.9 °C (-0.2) 14:51 6.1 °C (-1.9) 14.3 °C (+6.2), 2023 7.0 °C (-1.2), 2016
Mean Temperature 4.6 °C (-0.4) 3.9 °C (-1.6) 12.3 °C, 2023 3.5 °C, 2010
Minimum Humidity 47% 15:45 69% 83%, 2024 47%, 2015
Maximum Humidity 89% 01:32 91% 98%, 2010 82%, 2020
Mean Humidity 72% 81% 89%, 2011 72%, 2016
Minimum Pressure 1023 hPa 00:47 1016 hPa 1027 hPa, 2024 989 hPa, 2010
Maximum Pressure 1041 hPa 21:32 1024 hPa 1041 hPa, 2015 992 hPa, 2010
Mean Pressure 1035 hPa 1020 hPa 1035 hPa, 2015 990 hPa, 2010
Mean Wind Speed 4.3 mph (-0.8) 4.7 mph (-0.4) 10.2 mph, 2020 1.8 mph, 2017
Maximum Wind Speed 10.9 mph 04:45 12.1 mph 19.8 mph, 2020 6.4 mph, 2017
Maximum Gust 17.5 mph 04:44 17.2 mph 44.5 mph, 2022 9.4 mph, 2017
Mean Wind Direction NW
Rainfall 0.0 mm 16.5 mm (60%) 7.0 mm, 2016
Maximum Hourly Rain n/a 2.3, 2016
Maximum 10-min Rain n/a 0.8, 2022
Maximum Rain Rate n/a 30, 2022
Minimum Dew Point -3.5 °C 18:27 -1.8 °C 8.9 °C, 2023 -3.5 °C, 2015
Maximum Dew Point 2.5 °C 00:01 2.6 °C 11.3 °C, 2024 2.5 °C, 2015
Mean Dew Point -0.2 °C 0.8 °C 10.2 °C, 2023 -0.2 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.3 °C 07:19 1.9 °C 10.4 °C, 2023 0.4 °C, 2013
Day Maximum (09-21) 7.9 °C 14:51 6.1 °C 14.3 °C, 2023 7.0 °C, 2016
Max 10m Temp Rise 0.6 °C 20:29 0.3 °C 0.7 °C, 2019 0.2 °C, 2021
Max 1hr Temp Rise 1.6 °C 20:45 1.1 °C 2.7 °C, 2018 0.7 °C, 2021
Max 1hr Hum Rise 9% 19:13 6% 13%, 2013 3%, 2011
Max 10m Temp Fall 0.5 °C 17:42 0.3 °C 0.6 °C, 2022 0.2 °C, 2011
Max 1hr Temp Fall 2.3 °C 18:20 1.1 °C 2.3 °C, 2015 0.7 °C, 2009
Max 1hr Hum Fall 11% 12:25 8% 21%, 2013 4%, 2009
Max 10m Wind Speed 7.3 mph 04:53 8.8 mph 16.1 mph, 2020 4.1 mph, 2017
Minimum Feels-like -2.6 °C 04:44 -2.1 °C 11.9 °C, 2023 -2.6 °C, 2015
Maximum Feels-like 7.3 °C 16:45 5.2 °C 16.1 °C, 2023 5.2 °C, 2016
Mean Feels-like 2.5 °C 1.5 °C 13.7 °C, 2023 1.8 °C, 2016
Air-frost Hrs 0 hrs 0.8 hrs 0.4 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.6 °C (+0.2) 4.5 °C (-0.5) 9.9 °C (+4.5), 2019 2.9 °C (-2.5), 2024
Humidity Range 42% 22% 43%, 2013 10%, 2021
Pressure Range 18 hPa 8 hPa 18 hPa, 2015 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 9 [100%]42 hrs (91%) [29%] 9 [100%], 2015 0 [0%], 2021
Wet Hours 028 hrs (90%) [6.9%] 7, 2016 , 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments delayed tip reassigned
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 17th February 2015.
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