Daily Report for 6th April 2015

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.3 °C (-2.2) 05:45 5.2 °C (-0.3) 14.1 °C (+8.6), 2024 -2.3 °C (-7.8), 2012
Maximum Temperature 16.0 °C (+2.5) 12:52 12.1 °C (-1.3) 22.4 °C (+8.9), 2011 6.6 °C (-6.9), 2021
Mean Temperature 9.2 °C (+0.1) 8.6 °C (-0.8) 16.8 °C, 2011 3.0 °C, 2021
Minimum Humidity 54% 12:29 55% 80%, 2014 31%, 2011
Maximum Humidity 88% 07:23 91% 96%, 2014 79%, 2017
Mean Humidity 73% 73% 91%, 2014 60%, 2010
Minimum Pressure 1029 hPa 05:53 1019 hPa 1029 hPa, 2015 990 hPa, 2022
Maximum Pressure 1036 hPa 23:23 1027 hPa 1036 hPa, 2015 1006 hPa, 2022
Mean Pressure 1031 hPa 1023 hPa 1031 hPa, 2015 998 hPa, 2022
Mean Wind Speed 4.0 mph (-0.9) 4.7 mph (-0.2) 11.4 mph, 2022 2.1 mph, 2017
Maximum Wind Speed 11.4 mph 16:04 12.6 mph 25.2 mph, 2024 8.1 mph, 2017
Maximum Gust 17.0 mph 13:00 18.8 mph 38.0 mph, 2024 10.5 mph, 2017
Mean Wind Direction N
Rainfall 0.0 mm 9.3 mm (111%) 6.7 mm, 2022
Maximum Hourly Rain n/a 2.4, 2022
Maximum 10-min Rain n/a 2.1, 2022
Maximum Rain Rate n/a 42, 2022
Minimum Dew Point 0.2 °C 01:03 0.1 °C 11.5 °C, 2014 -7.6 °C, 2021
Maximum Dew Point 8.4 °C 10:07 7.8 °C 13.1 °C, 2014 -1.6 °C, 2021
Mean Dew Point 4.4 °C 3.6 °C 12.2 °C, 2014 -4.0 °C, 2021
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.3 °C 05:45 5.5 °C 13.7 °C, 2024 -2.3 °C, 2012
Day Maximum (09-21) 16.0 °C 12:52 11.9 °C 22.4 °C, 2011 6.6 °C, 2021
Max 10m Temp Rise 0.7 °C 08:46 0.5 °C 1.0 °C, 2012 0.2 °C, 2014
Max 1hr Temp Rise 3.3 °C 08:48 1.7 °C 4.5 °C, 2012 0.7 °C, 2014
Max 1hr Hum Rise 6% 18:14 8% 18%, 2021 4%, 2010
Max 10m Temp Fall 0.5 °C 16:10 0.5 °C 2.2 °C, 2022 0.2 °C, 2010
Max 1hr Temp Fall 1.4 °C 18:06 1.5 °C 3.1 °C, 2022 0.9 °C, 2010
Max 1hr Hum Fall 17% 11:06 12% 28%, 2016 5%, 2014
Max 10m Wind Speed 9.6 mph 16:11 9.8 mph 19.5 mph, 2024 5.8 mph, 2017
Minimum Feels-like 1.1 °C 05:19 2.4 °C 15.2 °C, 2014 -4.7 °C, 2021
Maximum Feels-like 16.1 °C 12:34 12.3 °C 23.6 °C, 2011 4.6 °C, 2021
Mean Feels-like 8.8 °C 7.4 °C 18.4 °C, 2024 -0.7 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 5 hrs, 2012 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.7 °C (+4.7) 6.9 °C (-1.0) 15.0 °C (+7.0), 2012 2.2 °C (-5.8), 2014
Humidity Range 34% 36% 60%, 2011 14%, 2019
Pressure Range 7 hPa 8 hPa 17 hPa, 2020 2 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7 [59%]20 hrs (67%) [28%] 12 [101%], 2017 0 [0%], 2014
Wet Hours 016 hrs (174%) [11%] 5, 2014 0, 2009
Cloud Cover am: Mostly Sunny
pm: Partly Cloudy transitioned to Mostly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 6th April 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.
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Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumLarge resolution version

Wind rose