Daily Report for 17th April 2024

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.7 °C (-1.3) 04:32 9.4 °C (+3.7) 10.4 °C (+4.4), 2018 -0.3 °C (-6.3), 2021
Maximum Temperature 11.6 °C (-2.9) 15:13 15.8 °C (+1.9) 19.8 °C (+5.3), 2022 10.8 °C (-3.7), 2009
Mean Temperature 7.7 °C (-2.1) 12.1 °C (+2.8) 14.7 °C, 2018 6.7 °C, 2016
Minimum Humidity 52% 15:24 60% 94%, 2009 27%, 2022
Maximum Humidity 88% 03:37 90% 97%, 2009 66%, 2014
Mean Humidity 74% 78% 96%, 2009 54%, 2014
Minimum Pressure 1015 hPa 17:35 1008 hPa 1027 hPa, 2023 993 hPa, 2012
Maximum Pressure 1019 hPa 23:58 1016 hPa 1032 hPa, 2021 1014 hPa, 2009
Mean Pressure 1017 hPa 1012 hPa 1030 hPa, 2021 1006 hPa, 2012
Mean Wind Speed 5.9 mph (+1.0) 8.2 mph (+3.3) 9.0 mph, 2018 1.6 mph, 2021
Maximum Wind Speed 14.7 mph 18:32 18.8 mph 22.3 mph, 2012 6.8 mph, 2010
Maximum Gust 20.7 mph 13:04 29.8 mph 33.5 mph, 2012 9.5 mph, 2010
Mean Wind Direction N
Rainfall 0.2 mm 24.0 mm (101%) 7.7 mm, 2009
Maximum Hourly Rain 0.2 mm 2.7 mm, 2009
Maximum 10-min Rain 0.2 mm 1.4 mm, 2009
Maximum Rain Rate n/a 32.8, 2009
Minimum Dew Point 1.5 °C 16:40 6.3 °C 7.0 °C, 2009 -3.9 °C, 2016
Maximum Dew Point 5.0 °C 00:06 10.6 °C 11.2 °C, 2013 1.2 °C, 2021
Mean Dew Point 3.0 °C 8.3 °C 8.4 °C, 2009 -1.0 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.7 °C 04:32 9.4 °C 10.4 °C, 2018 -0.3 °C, 2021
Day Maximum (09-21) 11.6 °C 15:14 15.8 °C 19.8 °C, 2022 10.8 °C, 2009
Max 10m Temp Rise 0.6 °C 10:24 0.6 °C 1.1 °C, 2012 0.3 °C, 2009
Max 1hr Temp Rise 1.4 °C 10:36 1.9 °C 4.9 °C, 2010 1.0 °C, 2009
Max 1hr Hum Rise 16% 18:58 10% 25%, 2012 1%, 2009
Max 10m Temp Fall 0.9 °C 18:41 0.8 °C 1.7 °C, 2012 0.3 °C, 2009
Max 1hr Temp Fall 2.2 °C 19:05 1.8 °C 4.5 °C, 2012 0.8 °C, 2009
Max 1hr Hum Fall 8% 11:01 11% 31%, 2012 1%, 2009
Max 10m Wind Speed 10.8 mph 18:40 14.3 mph 16.5 mph, 2018 5.3 mph, 2016
Minimum Feels-like 0.9 °C 04:17 7.9 °C 10.4 °C, 2018 -2.0 °C, 2016
Maximum Feels-like 11.6 °C 15:13 17.1 °C 20.2 °C, 2018 11.6 °C, 2024
Mean Feels-like 5.8 °C 12.4 °C 15.3 °C, 2018 5.8 °C, 2024
Air-frost Hrs 0 hrs 0 hrs 1 hrs, 2021 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.9 °C (-1.5) 6.4 °C (-1.8) 15.1 °C (+6.7), 2010 3.1 °C (-5.3), 2009
Humidity Range 36% 30% 64%, 2022 3%, 2009
Pressure Range 4 hPa 8 hPa 25 hPa, 2012 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4 [32%]60 hrs (67%) [29%] 12.5 [99%], 2010 0 [0%], 2009
Wet Hours 0.528 hrs (107%) [6.9%] 8, 2009 0, 2010
Cloud Cover unknown
Events None
Comments eve shs
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 11.6 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 17th April 2024.
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