Daily Report for 19th March 2016

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.4 °C (+0.8) 06:17 2.5 °C (-1.6) 11.9 °C (+7.3), 2017 -1.6 °C (-6.2), 2011
Maximum Temperature 8.3 °C (-3.0) 13:56 9.0 °C (-1.6) 15.9 °C (+4.6), 2014 3.2 °C (-8.1), 2018
Mean Temperature 6.6 °C (-1.1) 5.7 °C (-1.6) 13.0 °C, 2017 0.8 °C, 2018
Minimum Humidity 66% 14:44 58% 84%, 2020 38%, 2012
Maximum Humidity 85% 09:34 89% 97%, 2010 80%, 2014
Mean Humidity 75% 76% 92%, 2020 64%, 2012
Minimum Pressure 1025 hPa 10:33 1012 hPa 1033 hPa, 2022 994 hPa, 2013
Maximum Pressure 1027 hPa 05:15 1020 hPa 1043 hPa, 2022 999 hPa, 2013
Mean Pressure 1026 hPa 1016 hPa 1038 hPa, 2022 997 hPa, 2013
Mean Wind Speed 3.8 mph (-1.4) 4.3 mph (-0.9) 9.6 mph, 2018 1.6 mph, 2011
Maximum Wind Speed 9.9 mph 20:43 10.8 mph 21.7 mph, 2018 6.2 mph, 2011
Maximum Gust 18.0 mph 19:08 19.0 mph 31.4 mph, 2017 8.5 mph, 2011
Mean Wind Direction NNE
Rainfall 0.0 mm 26.7 mm (112%) 4.9 mm, 2010
Maximum Hourly Rain n/a 1.9, 2010
Maximum 10-min Rain n/a 1.1, 2010
Maximum Rain Rate n/a 16, 2010
Minimum Dew Point 0.7 °C 21:51 -1.8 °C 8.1 °C, 2024 -6.3 °C, 2018
Maximum Dew Point 4.5 °C 09:43 4.9 °C 10.9 °C, 2010 -2.4 °C, 2018
Mean Dew Point 2.4 °C 1.6 °C 9.5 °C, 2024 -4.6 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 5.4 °C 06:17 2.9 °C 12.0 °C, 2017 -1.6 °C, 2011
Day Maximum (09-21) 8.3 °C 13:56 8.9 °C 15.9 °C, 2014 3.2 °C, 2018
Max 10m Temp Rise 0.7 °C 09:42 0.5 °C 1.8 °C, 2009 0.2 °C, 2015
Max 1hr Temp Rise 1.1 °C 09:52 1.6 °C 4.9 °C, 2011 0.5 °C, 2020
Max 1hr Hum Rise 5% 05:48 7% 13%, 2021 2%, 2015
Max 10m Temp Fall 0.2 °C 15:02 0.4 °C 1.3 °C, 2009 0.2 °C, 2010
Max 1hr Temp Fall 0.6 °C 15:49 1.4 °C 3.2 °C, 2009 0.5 °C, 2015
Max 1hr Hum Fall 12% 12:42 11% 14%, 2012 3%, 2024
Max 10m Wind Speed 6.9 mph 19:05 7.8 mph 16.1 mph, 2018 4.5 mph, 2011
Minimum Feels-like 1.5 °C 05:01 -1.2 °C 12.3 °C, 2017 -8.0 °C, 2018
Maximum Feels-like 7.9 °C 12:27 8.3 °C 15.9 °C, 2014 -0.9 °C, 2018
Mean Feels-like 4.4 °C 3.5 °C 13.5 °C, 2017 -4.6 °C, 2018
Air-frost Hrs 0 hrs 0.3 hrs 6 hrs, 2018 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.9 °C (-3.8) 6.5 °C (+0.0) 12.7 °C (+6.0), 2011 2.2 °C (-4.5), 2015
Humidity Range 19% 31% 55%, 2011 8%, 2024
Pressure Range 2 hPa 8 hPa 12 hPa, 2018 2 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]68 hrs (101%) [35%] 11 [101%], 2022 0 [0%], 2015
Wet Hours 0.327 hrs (84%) [6%] 5, 2010 , 2009
Cloud Cover Overcast
Events None
Comments some am Drizzle
Extra Comments
Issues Wind data from Tottenham (TODO: calibration)
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 19th March 2016.
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