Daily Report for 1st October 2019

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	10.4 °C (+0.3)	22:52	10.4 °C (+0.3)	15.6 °C (+5.5), 2023	7.2 °C (-2.9), 2018
Maximum Temperature	18.9 °C (+2.1)	14:56	18.9 °C (+2.1)	27.1 °C (+10.3), 2011	13.3 °C (-3.5), 2024
Mean Temperature	15.0 °C (+1.2)		15.0 °C (+1.2)	19.3 °C, 2011	11.1 °C, 2018
Minimum Humidity	73%	15:09	73%	85%, 2024	40%, 2011
Maximum Humidity	95%	00:08	95%	98%, 2010	82%, 2009
Mean Humidity	90%		90%	91%, 2024	66%, 2018
Minimum Pressure	997 hPa	14:28	997 hPa	1029 hPa, 2015	993 hPa, 2020
Maximum Pressure	1009 hPa	23:57	1009 hPa	1033 hPa, 2015	1001 hPa, 2020
Mean Pressure	1001 hPa		1001 hPa	1031 hPa, 2015	998 hPa, 2020
Mean Wind Speed	4.6 mph (+0.5)		4.6 mph (+0.5)	7.2 mph, 2017	1.2 mph, 2011
Maximum Wind Speed	17.2 mph	21:27	17.2 mph	17.6 mph, 2022	8.1 mph, 2011
Maximum Gust	21.9 mph	17:06	21.9 mph	29.7 mph, 2021	10.0 mph, 2011
Mean Wind Direction	n/a		W	NNW, 2018	NE, 2015
Rainfall	17.6 mm		17.6 mm (839%)	17.6 mm, 2019	0.0 mm, 2009
Maximum Hourly Rain	10.8 mm	18:01	10.8 mm	10.8 mm, 2019	0.2 mm, 2017
Maximum 10-min Rain	7.0 mm	17:15	7.0 mm	7.0 mm, 2019	0.2 mm, 2017
Maximum Rain Rate	92 mm/h	17:07	92 mm/h	92 mm/h, 2019	10 mm/h, 2010
Minimum Dew Point	8.6 °C	23:50	8.6 °C	13.4 °C, 2023	2.7 °C, 2018
Maximum Dew Point	15.8 °C	00:08	15.8 °C	18.6 °C, 2023	6.4 °C, 2018
Mean Dew Point	13.4 °C		13.4 °C	16.1 °C, 2023	4.7 °C, 2018
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	12.7 °C	23:54	12.7 °C	15.6 °C, 2023	7.2 °C, 2018
Day Maximum (09-21)	18.9 °C	14:59	18.9 °C	27.1 °C, 2011	13.3 °C, 2024
Max 10m Temp Rise	0.4 °C	12:48	0.4 °C	0.9 °C, 2011	0.2 °C, 2010
Max 1hr Temp Rise	1.7 °C	13:36	1.7 °C	4.4 °C, 2011	0.6 °C, 2010
Max 1hr Hum Rise	15%	16:09	15%	15%, 2019	3%, 2023
Max 10m Temp Fall	1.2 °C	17:12	1.2 °C	1.2 °C, 2019	0.2 °C, 2010
Max 1hr Temp Fall	3.4 °C	16:08	3.4 °C	3.4 °C, 2019	0.3 °C, 2017
Max 1hr Hum Fall	10%	13:43	10%	20%, 2014	3%, 2024
Max 10m Wind Speed	9.2 mph	10:18	9.2 mph	12.6 mph, 2021	5.9 mph, 2025
Minimum Feels-like	11.2 °C	23:50	11.2 °C	18.6 °C, 2023	4.5 °C, 2018
Maximum Feels-like	22.9 °C	14:27	22.9 °C	30.2 °C, 2011	15.1 °C, 2018
Mean Feels-like	18.1 °C		18.1 °C	23.2 °C, 2023	10.3 °C, 2018
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	n/a		0.0 µg/m³	0.0 µg/m³, 2009	0.0 µg/m³, 2009
Maximum PM2.5	n/a		0.0 µg/m³	n/a	n/a
Mean PM2.5	n/a		0.0 µg/m³	n/a	n/a
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	8.5 °C (+1.8)		8.5 °C	14.8 °C, 2011	1.9 °C, 2024
Humidity Range	22%		22%	54%, 2011	11%, 2024
Pressure Range	11 hPa		11 hPa	16 hPa, 2022	2 hPa, 2011

Observation	Detail
Sun Hours	2.4 hrs [23%]
Wet Hours	7 hrs
Cloud Cover	am: Mostly Cloudy pm: Mostly Sunny transitioned to Overcast
Events	Light Thunderstorm
Comments	Rn spells and thundery showers
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	14.5 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 1st October 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