Daily Report for 28th December 2010

<<Previous Day
Reset 		Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.7 °C (-0.7) 01:45 -1.6 °C (-5.2) 9.7 °C (+6.3), 2023 -1.3 °C (-4.7), 2014
Maximum Temperature 8.0 °C (+0.2) 23:51 2.8 °C (-5.4) 13.7 °C (+5.9), 2015 2.6 °C (-5.2), 2020
Mean Temperature 5.1 °C (-0.2) 0.8 °C (-5.3) 11.5 °C, 2015 1.1 °C, 2016
Minimum Humidity 74% 00:01 78% 95%, 2024 60%, 2011
Maximum Humidity 98% 21:52 93% 98%, 2009 83%, 2016
Mean Humidity 93% 87% 96%, 2024 74%, 2011
Minimum Pressure 1012 hPa 04:47 1010 hPa 1041 hPa, 2016 972 hPa, 2020
Maximum Pressure 1017 hPa 23:04 1017 hPa 1045 hPa, 2016 983 hPa, 2020
Mean Pressure 1014 hPa 1013 hPa 1043 hPa, 2016 976 hPa, 2020
Mean Wind Speed 2.1 mph (-3.0) 4.7 mph (-0.4) 11.4 mph, 2023 0.5 mph, 2016
Maximum Wind Speed 7.4 mph 11.6 mph 24.4 mph, 2023 4.7 mph, 2016
Maximum Gust 9.8 mph 00:08 16.6 mph 34.6 mph, 2023 7.3 mph, 2016
Mean Wind Direction SSE
Rainfall 4.4 mm 26.1 mm (51%) 8.0 mm, 2023
Maximum Hourly Rain 2.2 mm 01:03 2.2 mm, 2010
Maximum 10-min Rain 0.8 mm 04:59 1.5 mm, 2021
Maximum Rain Rate 20 mm/h 04:52 30 mm/h, 2022
Minimum Dew Point -0.9 °C 00:06 -4.1 °C 7.4 °C, 2022 -4.3 °C, 2014
Maximum Dew Point 7.7 °C 23:51 1.1 °C 11.1 °C, 2012 0.7 °C, 2014
Mean Dew Point 4.0 °C -1.2 °C 9.2 °C, 2022 -2.1 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.7 °C -1.2 °C 9.8 °C, 2023 -1.2 °C, 2009
Day Maximum (09-21) * 7.3 °C * 2.5 °C 13.7 °C, 2015 2.5 °C, 2020
Max 10m Temp Rise 0.2 °C 09:32 0.2 °C 0.5 °C, 2012 0.2 °C, 2010
Max 1hr Temp Rise 0.8 °C 12:16 0.9 °C 1.6 °C, 2014 0.5 °C, 2019
Max 1hr Hum Rise 5% 01:02 5% 8%, 2023 1%, 2024
Max 10m Temp Fall 0.2 °C 00:12 0.3 °C 0.7 °C, 2023 0.2 °C, 2009
Max 1hr Temp Fall 0.5 °C 01:02 1.0 °C 2.4 °C, 2014 0.2 °C, 2018
Max 1hr Hum Fall 1% 20:45 5% 8%, 2014 1%, 2010
Max 10m Wind Speed 5.0 mph 01:51 8.0 mph 17.3 mph, 2023 3.5 mph, 2016
Minimum Feels-like -0.6 °C 02:03 -5.7 °C 7.3 °C, 2015 -6.2 °C, 2017
Maximum Feels-like 8.3 °C 23:44 2.4 °C 13.9 °C, 2015 2.2 °C, 2020
Mean Feels-like 4.6 °C -1.6 °C 11.7 °C, 2015 -2.2 °C, 2017
Air-frost Hrs 0 hrs 10 hrs 6 hrs, 2016 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.3 °C (+0.9) 4.4 °C (-0.2) 8.2 °C (+3.8), 2012 1.7 °C (-2.7), 2022
Humidity Range 24% 15% 32%, 2014 2%, 2024
Pressure Range 5 hPa 7 hPa 23 hPa, 2014 2 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]29 hrs (49%) [14%] 7.2 [103%], 2017 0 [0%], 2010
Wet Hours 4
[Mean rain rate: 1.1 mm/h]		34 hrs (60%) [5%] 9, 2022 0, 2009
Cloud Cover Overcast
Events None
Comments 00-06 Heavy Showers; 09-12 occasional. Moderate Drizzle
Extra Comments
Issues None known
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 28th December 2010.
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

daycamsumdaycamsum2

Wind rose