Daily Report for 28th January 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.6 °C (-0.3) 23:54 2.3 °C (-0.7) 8.9 °C (+6.0), 2021 -0.7 °C (-3.6), 2019
Maximum Temperature 10.1 °C (+2.3) 10:39 8.6 °C (+0.8) 12.9 °C (+5.1), 2018 1.2 °C (-6.6), 2011
Mean Temperature 6.3 °C (+1.0) 5.6 °C (+0.0) 11.1 °C, 2018 0.5 °C, 2011
Minimum Humidity 51% 16:26 68% 81%, 2021 51%, 2015
Maximum Humidity 95% 09:15 92% 97%, 2021 76%, 2011
Mean Humidity 74% 81% 91%, 2021 64%, 2011
Minimum Pressure 999 hPa 23:58 1011 hPa 1032 hPa, 2023 983 hPa, 2014
Maximum Pressure 1019 hPa 00:00 1022 hPa 1037 hPa, 2022 989 hPa, 2014
Mean Pressure 1005 hPa 1017 hPa 1035 hPa, 2022 985 hPa, 2014
Mean Wind Speed 9.4 mph (+4.2) 6.2 mph (+1.0) 9.4 mph, 2015 2.0 mph, 2023
Maximum Wind Speed 20.1 mph 14:32 16.2 mph 25.9 mph, 2013 6.7 mph, 2023
Maximum Gust 34.2 mph 12:06 23.6 mph 34.2 mph, 2015 10.4 mph, 2023
Mean Wind Direction WSW
Rainfall 3.7 mm 70.4 mm (132%) 19.9 mm, 2021
Maximum Hourly Rain 2.4 mm 10:52 4.6 mm, 2021
Maximum 10-min Rain 1.1 mm 10:34 1.5 mm, 2014
Maximum Rain Rate 24 mm/h 10:45 24 mm/h, 2015
Minimum Dew Point -4.5 °C 18:35 -0.8 °C 8.1 °C, 2021 -6.5 °C, 2011
Maximum Dew Point 9.2 °C 10:39 6.6 °C 10.3 °C, 2018 -3.8 °C, 2011
Mean Dew Point 1.8 °C 2.6 °C 9.3 °C, 2021 -5.6 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.5 °C * 01:36 3.9 °C 8.9 °C, 2021 0.4 °C, 2011
Day Maximum (09-21) 10.1 °C 10:39 7.9 °C 12.9 °C, 2018 1.2 °C, 2011
Max 10m Temp Rise 0.2 °C 06:53 0.3 °C 0.4 °C, 2010 0.1 °C, 2011
Max 1hr Temp Rise 0.9 °C 09:01 1.1 °C 1.9 °C, 2024 0.3 °C, 2011
Max 1hr Hum Rise 6% 07:31 6% 9%, 2013 2%, 2018
Max 10m Temp Fall 1.9 °C 12:17 0.4 °C 1.9 °C, 2015 0.2 °C, 2010
Max 1hr Temp Fall 2.9 °C 12:33 1.1 °C 2.9 °C, 2015 0.6 °C, 2018
Max 1hr Hum Fall 18% 12:08 9% 18%, 2015 3%, 2011
Max 10m Wind Speed 16.1 mph 12:14 11.7 mph 16.8 mph, 2013 5.1 mph, 2023
Minimum Feels-like -3.0 °C 23:44 -1.4 °C 6.7 °C, 2021 -6.0 °C, 2011
Maximum Feels-like 11.0 °C 10:25 8.6 °C 14.3 °C, 2018 0.2 °C, 2011
Mean Feels-like 2.7 °C 3.6 °C 11.3 °C, 2021 -3.7 °C, 2011
Air-frost Hrs 0 hrs 1 hrs 5 hrs, 2011 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.5 °C (+2.7) 6.2 °C (+1.5) 8.0 °C (+3.2), 2013 1.7 °C (-3.1), 2011
Humidity Range 44% 24% 44%, 2015 15%, 2018
Pressure Range 20 hPa 10 hPa 20 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [25%]70 hrs (113%) [33%] 8 [100%], 2019 0 [0%], 2009
Wet Hours 2
[Mean rain rate: 1.9 mm/h]
62 hrs (103%) [9.3%] 9, 2021 , 2009
Cloud Cover am: Overcast
pm: Mostly Cloudy transitioned to Mostly Sunny
Events None
Comments 1030, 12,1330 Heavy Showers
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 28th January 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose