Daily Report for 26th July 2019

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	19.6 °C (+4.9)	09:36	15.0 °C (+0.9)	19.6 °C (+4.9), 2019	9.4 °C (-5.3), 2023
Maximum Temperature	25.2 °C (+1.9)	01:06	24.9 °C (+1.9)	33.9 °C (+10.6), 2018	16.6 °C (-6.7), 2015
Mean Temperature	22.4 °C (+3.4)		20.0 °C (+1.4)	26.6 °C, 2018	14.5 °C, 2015
Minimum Humidity	59%	03:10	48%	66%, 2017	30%, 2018
Maximum Humidity	89%	09:51	86%	96%, 2021	75%, 2012
Mean Humidity	74%		68%	82%, 2021	53%, 2012
Minimum Pressure	1010 hPa	04:41	1016 hPa	1019 hPa, 2016	996 hPa, 2015
Maximum Pressure	1013 hPa	11:39	1021 hPa	1023 hPa, 2009	1012 hPa, 2021
Mean Pressure	1011 hPa		1018 hPa	1020 hPa, 2016	1005 hPa, 2015
Mean Wind Speed	3.7 mph (-0.6)		3.9 mph (-0.4)	7.0 mph, 2026	1.4 mph, 2021
Maximum Wind Speed	12.6 mph	04:32	11.5 mph	15.8 mph, 2026	6.7 mph, 2021
Maximum Gust	19.5 mph	04:29	18.3 mph	24.2 mph, 2026	10.3 mph, 2021
Mean Wind Direction	n/a		SSW	N, 2014	NNE, 2011
Rainfall	2.0 mm		27.0 mm (70%)	7.7 mm, 2023	0.0 mm, 2011
Maximum Hourly Rain	1.1 mm	04:44	0.6 mm	3.4 mm, 2015	0.3 mm, 2009
Maximum 10-min Rain	1.1 mm	04:44	0.3 mm	1.1 mm, 2019	0.3 mm, 2009
Maximum Rain Rate	13 mm/h	04:40	2.3 mm/h	18 mm/h, 2020	0.3 mm/h, 2009
Minimum Dew Point	15.6 °C	03:13	10.9 °C	15.6 °C, 2019	7.3 °C, 2015
Maximum Dew Point	19.3 °C	01:08	15.8 °C	19.6 °C, 2018	12.5 °C, 2011
Mean Dew Point	17.6 °C		13.5 °C	17.6 °C, 2019	10.8 °C, 2016
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	19.7 °C	08:53	15.0 °C	19.7 °C, 2019	9.4 °C, 2023
Day Maximum (09-21)	24.8 °C	17:33	24.8 °C	33.9 °C, 2018	16.6 °C, 2015
Max 10m Temp Rise	0.7 °C	09:58	0.6 °C	0.8 °C, 2026	0.3 °C, 2015
Max 1hr Temp Rise	1.8 °C	14:38	2.2 °C	3.3 °C, 2018	1.3 °C, 2015
Max 1hr Hum Rise	18%	05:11	10%	23%, 2020	5%, 2011
Max 10m Temp Fall	0.9 °C	04:50	0.5 °C	1.8 °C, 2020	0.3 °C, 2015
Max 1hr Temp Fall	2.3 °C	05:29	1.8 °C	3.1 °C, 2020	0.8 °C, 2015
Max 1hr Hum Fall	12%	03:05	11%	15%, 2020	2%, 2015
Max 10m Wind Speed	9.4 mph	10:11	8.3 mph	12.2 mph, 2017	4.2 mph, 2009
Minimum Feels-like	24.9 °C	09:03	17.4 °C	24.9 °C, 2019	9.7 °C, 2023
Maximum Feels-like	32.2 °C	01:07	28.7 °C	38.7 °C, 2018	20.6 °C, 2015
Mean Feels-like	28.1 °C		23.2 °C	31.9 °C, 2018	16.4 °C, 2015
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	n/a		0.0 µg/m³	1.5 µg/m³, 2026	0.0 µg/m³, 2009
Maximum PM2.5	n/a		0.0 µg/m³	7.7 µg/m³, 2026	7.7 µg/m³, 2026
Mean PM2.5	n/a		0.0 µg/m³	3.8 µg/m³, 2026	3.8 µg/m³, 2026
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	5.6 °C (-3.0)		9.9 °C	14.8 °C, 2018	3.6 °C, 2015
Humidity Range	30%		37%	61%, 2018	19%, 2017
Pressure Range	4 hPa		5 hPa	20 hPa, 2015	2 hPa, 2010

Observation	Detail
Sun Hours	1.5 hrs [10%]
Wet Hours	3 hrs
Cloud Cover	Overcast with periods of Mostly Cloudy
Events	Light Thunderstorm
Comments	am Thunder Shs
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	23.0 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 26th July 2019. Times of extremes use the midpoint of the longest continuous period at that value. Cumulative anomalies are relative to the expected value for the month-to-date. Sun and wet hours are derived from webcam/rainfall analysis and may be adjusted. Data should be viewed with appropriate caution.

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Daily Graph of Conditions

Wind direction

Air pollution

Wind rose

Webcam Summary of Cloud Conditions

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