Daily Report for 8th March 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.8 °C (+4.0) 23:27 3.1 °C (-0.5) 8.1 °C (+4.3), 2017 -3.1 °C (-6.9), 2010
Maximum Temperature 9.7 °C (-0.5) 16:08 9.5 °C (-0.4) 16.8 °C (+6.6), 2025 2.2 °C (-8.0), 2023
Mean Temperature 8.8 °C (+1.8) 6.3 °C (-0.5) 11.4 °C, 2014 1.4 °C, 2023
Minimum Humidity 98% 63% 98%, 2013 36%, 2014
Maximum Humidity 98% 90% 98%, 2013 78%, 2012
Mean Humidity 98% 79% 98%, 2013 62%, 2014
Minimum Pressure 995 hPa 01:58 1009 hPa 1027 hPa, 2010 990 hPa, 2023
Maximum Pressure 1001 hPa 23:37 1014 hPa 1035 hPa, 2012 999 hPa, 2023
Mean Pressure 997 hPa 1011 hPa 1030 hPa, 2010 993 hPa, 2023
Mean Wind Speed 2.3 mph (-2.9) 3.6 mph (-1.6) 9.7 mph, 2020 1.4 mph, 2021
Maximum Wind Speed 6.4 mph 06:52 10.3 mph 25.7 mph, 2018 6.4 mph, 2013
Maximum Gust 8.7 mph 06:52 14.2 mph 35.7 mph, 2018 8.7 mph, 2013
Mean Wind Direction ENE
Rainfall 12.5 mm 17.5 mm (174%) 12.5 mm, 2013
Maximum Hourly Rain 1.8 mm 14:08 3.3 mm, 2020
Maximum 10-min Rain 0.7 mm 13:20 2.4 mm, 2020
Maximum Rain Rate 2.8 mm/h 13:20 36 mm/h, 2020
Minimum Dew Point 7.5 °C 23:27 0.1 °C 7.5 °C, 2013 -7.6 °C, 2010
Maximum Dew Point 9.4 °C 16:08 4.8 °C 10.8 °C, 2017 0.1 °C, 2010
Mean Dew Point 8.5 °C 2.6 °C 8.5 °C, 2013 -4.0 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 8.5 °C * 07:22 3.6 °C 9.4 °C, 2020 -3.1 °C, 2010
Day Maximum (09-21) 9.7 °C 16:08 9.5 °C 16.8 °C, 2025 2.2 °C, 2023
Max 10m Temp Rise 0.1 °C 02:12 0.4 °C 0.9 °C, 2011 0.1 °C, 2013
Max 1hr Temp Rise 0.3 °C 13:15 1.4 °C 4.4 °C, 2011 0.3 °C, 2013
Max 1hr Hum Rise 0% 01:01 5% 21%, 2020 0%, 2013
Max 10m Temp Fall 0.2 °C 19:13 0.3 °C 1.0 °C, 2020 0.2 °C, 2010
Max 1hr Temp Fall 0.5 °C 22:15 1.1 °C 3.5 °C, 2020 0.5 °C, 2010
Max 1hr Hum Fall 0% 01:01 8% 16%, 2014 0%, 2013
Max 10m Wind Speed 4.8 mph 09:53 7.7 mph 19.4 mph, 2018 4.8 mph, 2013
Minimum Feels-like 6.2 °C 06:52 0.7 °C 6.2 °C, 2013 -7.4 °C, 2010
Maximum Feels-like 10.7 °C 16:02 9.3 °C 16.8 °C, 2025 0.8 °C, 2023
Mean Feels-like 8.4 °C 4.9 °C 11.0 °C, 2025 -2.7 °C, 2023
Air-frost Hrs 0 hrs 1 hrs 9 hrs, 2010 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 1.9 °C (-4.5) 6.4 °C (+0.1) 14.0 °C (+7.6), 2011 1.9 °C (-4.5), 2013
Humidity Range 0% 27% 52%, 2014 0%, 2013
Pressure Range 6 hPa 6 hPa 16 hPa, 2024 4 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]22 hrs (79%) [27%] 10 [98%], 2011 0 [0%], 2013
Wet Hours 17
[Mean rain rate: 0.7 mm/h]		39 hrs (285%) [20%] 17, 2013 , 2009
Cloud Cover Overcast
Events Dense Fog
Comments pre-10 Dense Fog; 00-03 Slight, 10- Slight/Light Rain
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 8th March 2013.
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