Daily Report for 7th January 2023

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.3 °C (+4.2) 21:20 6.1 °C (+2.9) 8.7 °C (+5.6), 2014 -5.3 °C (-8.4), 2010
Maximum Temperature 12.3 °C (+4.5) 01:18 12.0 °C (+4.1) 12.6 °C (+4.8), 2020 0.1 °C (-7.7), 2010
Mean Temperature 10.2 °C (+4.3) 9.6 °C (+3.5) 10.3 °C, 2014 -2.6 °C, 2010
Minimum Humidity 82% 07:21 82% 93%, 2011 59%, 2009
Maximum Humidity 92% 14:26 94% 98%, 2011 80%, 2009
Mean Humidity 87% 89% 97%, 2011 68%, 2012
Minimum Pressure 996 hPa 16:59 1009 hPa 1030 hPa, 2017 977 hPa, 2016
Maximum Pressure 1011 hPa 00:00 1019 hPa 1038 hPa, 2019 1000 hPa, 2016
Mean Pressure 1001 hPa 1014 hPa 1032 hPa, 2019 988 hPa, 2016
Mean Wind Speed 11.1 mph (+5.9) 7.7 mph (+2.5) 11.1 mph, 2023 1.8 mph, 2009
Maximum Wind Speed 21.2 mph 17:56 18.0 mph 21.9 mph, 2014 7.9 mph, 2021
Maximum Gust 33.4 mph 07:08 28.5 mph 34.2 mph, 2016 10.0 mph, 2009
Mean Wind Direction SW
Rainfall 1.7 mm 12.7 mm (95%) 11.8 mm, 2016
Maximum Hourly Rain 0.7 mm 16:59 3.9 mm, 2016
Maximum 10-min Rain 0.5 mm 16:39 2.4 mm, 2014
Maximum Rain Rate 4.8 mm/h 16:39 54 mm/h, 2014
Minimum Dew Point 5.1 °C 21:10 4.6 °C 6.5 °C, 2013 -6.3 °C, 2010
Maximum Dew Point 10.4 °C 00:15 10.2 °C 11.3 °C, 2020 -1.7 °C, 2010
Mean Dew Point 8.1 °C 7.8 °C 8.1 °C, 2023 -3.9 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 10.6 °C * 08:55 7.8 °C 10.6 °C, 2023 -5.3 °C, 2010
Day Maximum (09-21) * 11.1 °C * 15:25 11.6 °C 12.4 °C, 2020 0.1 °C, 2010
Max 10m Temp Rise 0.2 °C 11:34 0.4 °C 0.4 °C, 2010 0.2 °C, 2012
Max 1hr Temp Rise 0.6 °C 15:18 1.2 °C 1.8 °C, 2015 0.6 °C, 2012
Max 1hr Hum Rise 6% 09:18 6% 10%, 2014 1%, 2011
Max 10m Temp Fall 0.5 °C 18:03 0.4 °C 0.9 °C, 2016 0.1 °C, 2013
Max 1hr Temp Fall 1.6 °C 18:52 1.4 °C 2.8 °C, 2016 0.3 °C, 2017
Max 1hr Hum Fall 5% 18:22 6% 14%, 2016 1%, 2017
Max 10m Wind Speed 16.1 mph 17:57 13.3 mph 16.1 mph, 2014 6.5 mph, 2017
Minimum Feels-like 2.9 °C 21:03 3.8 °C 5.2 °C, 2012 -11.5 °C, 2010
Maximum Feels-like 13.8 °C 00:00 13.2 °C 14.5 °C, 2020 0.0 °C, 2010
Mean Feels-like 9.7 °C 9.5 °C 9.8 °C, 2014 -6.3 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 22 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.0 °C (+0.3) 5.9 °C (+1.2) 9.5 °C (+4.8), 2011 2.1 °C (-2.6), 2013
Humidity Range 10% 12% 26%, 2016 4%, 2017
Pressure Range 15 hPa 10 hPa 23 hPa, 2016 2 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]8.5 hrs (57%) [17%] 6.7 [93%], 2018 0 [0%], 2009
Wet Hours 3
[Mean rain rate: 0.6 mm/h]
17 hrs (112%) [10%] 9, 2016 , 2009
Cloud Cover unknown
Events None
Comments -
Extra Comments 1540 rainbow
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 7.4 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 7th January 2023.
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

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose