Daily Report for 24th July 2019

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	19.6 °C (+4.9)	05:28	14.6 °C (+0.6)	19.6 °C (+4.9), 2019	10.6 °C (-4.1), 2011
Maximum Temperature	32.2 °C (+8.9)	15:52	24.4 °C (+1.4)	32.2 °C (+8.9), 2019	16.5 °C (-6.8), 2015
Mean Temperature	26.2 °C (+6.9)		19.6 °C (+1.0)	26.2 °C, 2019	14.4 °C, 2015
Minimum Humidity	33%	17:45	49%	77%, 2023	30%, 2012
Maximum Humidity	89%	06:42	86%	95%, 2024	73%, 2026
Mean Humidity	60%		68%	86%, 2023	50%, 2012
Minimum Pressure	1010 hPa	04:51	1017 hPa	1020 hPa, 2010	1004 hPa, 2015
Maximum Pressure	1016 hPa	23:32	1021 hPa	1024 hPa, 2010	1010 hPa, 2023
Mean Pressure	1013 hPa		1019 hPa	1022 hPa, 2010	1007 hPa, 2023
Mean Wind Speed	4.4 mph (+0.1)		3.9 mph (-0.4)	9.9 mph, 2022	2.2 mph, 2012
Maximum Wind Speed	13.5 mph	12:39	11.3 mph	20.2 mph, 2022	9.2 mph, 2012
Maximum Gust	23.0 mph	17:12	18.0 mph	28.5 mph, 2022	13.0 mph, 2012
Mean Wind Direction	n/a		SSW	NNW, 2017	N, 2023
Rainfall	1.1 mm		25.0 mm (70%)	31.9 mm, 2015	0.0 mm, 2010
Maximum Hourly Rain	0.9 mm	01:51	0.6 mm	11.2 mm, 2015	0.3 mm, 2023
Maximum 10-min Rain	0.7 mm	01:29	0.2 mm	2.6 mm, 2015	0.3 mm, 2021
Maximum Rain Rate	4.4 mm/h	01:26	2.0 mm/h	42 mm/h, 2015	1.0 mm/h, 2021
Minimum Dew Point	12.0 °C	20:00	10.5 °C	14.7 °C, 2018	3.4 °C, 2011
Maximum Dew Point	20.2 °C	10:02	15.4 °C	20.2 °C, 2019	10.0 °C, 2011
Mean Dew Point	16.9 °C		13.1 °C	16.9 °C, 2019	6.8 °C, 2011
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	19.6 °C	05:29	14.6 °C	19.6 °C, 2019	10.6 °C, 2011
Day Maximum (09-21)	32.2 °C	16:18	24.4 °C	32.2 °C, 2019	15.8 °C, 2015
Max 10m Temp Rise	1.9 °C	07:30	0.6 °C	1.9 °C, 2019	0.4 °C, 2015
Max 1hr Temp Rise	3.3 °C	08:19	2.2 °C	5.5 °C, 2012	0.5 °C, 2015
Max 1hr Hum Rise	12%	23:31	9%	19%, 2015	4%, 2017
Max 10m Temp Fall	0.7 °C	21:54	0.5 °C	1.1 °C, 2026	0.3 °C, 2016
Max 1hr Temp Fall	2.3 °C	22:04	1.8 °C	3.2 °C, 2009	0.9 °C, 2017
Max 1hr Hum Fall	15%	08:14	10%	18%, 2012	1%, 2015
Max 10m Wind Speed	10.2 mph	16:14	8.2 mph	18.1 mph, 2022	4.3 mph, 2009
Minimum Feels-like	25.2 °C	05:19	16.8 °C	25.2 °C, 2019	10.6 °C, 2011
Maximum Feels-like	38.0 °C	13:18	27.9 °C	38.0 °C, 2019	18.5 °C, 2015
Mean Feels-like	31.5 °C		22.6 °C	31.5 °C, 2019	15.8 °C, 2015
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	n/a		0.0 µg/m³	8.1 µg/m³, 2026	0.0 µg/m³, 2009
Maximum PM2.5	n/a		0.0 µg/m³	27.3 µg/m³, 2026	27.3 µg/m³, 2026
Mean PM2.5	n/a		0.0 µg/m³	12.6 µg/m³, 2026	12.6 µg/m³, 2026
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	12.6 °C (+4.1)		9.7 °C	16.5 °C, 2012	2.8 °C, 2023
Humidity Range	56%		37%	58%, 2014	13%, 2017
Pressure Range	5 hPa		5 hPa	11 hPa, 2015	2 hPa, 2018

Observation	Detail
Sun Hours	12 hrs [83%]
Wet Hours	2 hrs
Cloud Cover	Sunny with periods of Hazy
Events	Thunder
Comments	o.night Thunder Shs
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	22.0 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 24th 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

Full resolution images at up-to 5 minute intervals