Daily Report for 5th August 2019

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	16.5 °C (+2.0)	03:54	15.4 °C (+0.9)	17.3 °C (+2.8), 2026	11.7 °C (-2.8), 2010
Maximum Temperature	24.9 °C (+1.7)	15:24	25.2 °C (+1.9)	28.2 °C (+5.0), 2018	18.1 °C (-5.1), 2023
Mean Temperature	19.8 °C (+1.8)		20.0 °C (+1.4)	22.4 °C, 2018	14.5 °C, 2023
Minimum Humidity	44%	15:23	51%	82%, 2023	34%, 2020
Maximum Humidity	92%	10:38	89%	95%, 2018	70%, 2022
Mean Humidity	72%		72%	89%, 2023	53%, 2022
Minimum Pressure	1009 hPa	17:11	1015 hPa	1020 hPa, 2018	998 hPa, 2021
Maximum Pressure	1012 hPa	00:20	1018 hPa	1028 hPa, 2022	1009 hPa, 2012
Mean Pressure	1010 hPa		1016 hPa	1024 hPa, 2018	1006 hPa, 2021
Mean Wind Speed	6.3 mph (+2.3)		3.7 mph (-0.3)	8.3 mph, 2020	2.1 mph, 2017
Maximum Wind Speed	13.7 mph	13:37	10.4 mph	19.9 mph, 2026	8.7 mph, 2009
Maximum Gust	23.0 mph	14:52	16.3 mph	31.1 mph, 2026	12.5 mph, 2009
Mean Wind Direction	n/a		SSE	NNW, 2022	ESE, 2018
Rainfall	0.9 mm		0.9 mm (10%)	15.8 mm, 2012	0.0 mm, 2009
Maximum Hourly Rain	0.9 mm	09:16	0.2 mm	14.1 mm, 2012	0.5 mm, 2015
Maximum 10-min Rain	0.4 mm	09:00	0.1 mm	8.3 mm, 2012	0.2 mm, 2015
Maximum Rain Rate	2.2 mm/h	09:00	0.4 mm/h	100 mm/h, 2012	0.8 mm/h, 2015
Minimum Dew Point	11.5 °C	15:04	12.7 °C	14.2 °C, 2009	6.0 °C, 2010
Maximum Dew Point	17.6 °C	11:59	16.8 °C	19.1 °C, 2024	9.8 °C, 2022
Mean Dew Point	14.1 °C		14.6 °C	16.2 °C, 2009	8.3 °C, 2010
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	16.5 °C	03:53	15.4 °C	18.5 °C, 2026	11.7 °C, 2010
Day Maximum (09-21)	24.9 °C	15:24	25.2 °C	28.2 °C, 2018	18.1 °C, 2023
Max 10m Temp Rise	0.7 °C	11:06	0.7 °C	1.5 °C, 2016	0.4 °C, 2023
Max 1hr Temp Rise	3.1 °C	12:00	2.4 °C	3.5 °C, 2018	1.1 °C, 2023
Max 1hr Hum Rise	12%	19:38	10%	18%, 2013	4%, 2024
Max 10m Temp Fall	0.6 °C	12:24	0.4 °C	1.4 °C, 2017	0.4 °C, 2009
Max 1hr Temp Fall	1.5 °C	19:52	1.5 °C	3.5 °C, 2012	1.3 °C, 2014
Max 1hr Hum Fall	18%	12:18	12%	18%, 2018	6%, 2023
Max 10m Wind Speed	11.6 mph	14:58	7.8 mph	14.5 mph, 2026	6.7 mph, 2009
Minimum Feels-like	19.9 °C	03:34	18.4 °C	19.9 °C, 2019	12.6 °C, 2010
Maximum Feels-like	27.6 °C	15:27	29.2 °C	33.3 °C, 2009	21.4 °C, 2010
Mean Feels-like	23.2 °C		23.8 °C	26.2 °C, 2009	17.1 °C, 2010
Air-frost Hrs	0 hrs		0 hrs	0 hrs, 2009	0 hrs, 2009
Minimum PM2.5	n/a		0.0 µg/m³	0.8 µg/m³, 2026	0.0 µg/m³, 2009
Maximum PM2.5	n/a		0.0 µg/m³	6.7 µg/m³, 2026	6.7 µg/m³, 2026
Mean PM2.5	n/a		0.0 µg/m³	3.0 µg/m³, 2026	3.0 µg/m³, 2026
Measure	Value (anomaly)		Month cumul.	Record High	Record Low
Temperature Range	8.4 °C (-0.3)		9.7 °C	12.7 °C, 2018	5.7 °C, 2023
Humidity Range	48%		39%	54%, 2018	13%, 2023
Pressure Range	3 hPa		4 hPa	16 hPa, 2023	2 hPa, 2009

Observation	Detail
Sun Hours	3 hrs [22%]
Wet Hours	1 hrs
Cloud Cover	am: Overcast transitioned to Partly Cloudy pm: Partly Cloudy
Events	None
Comments	am brief Rn
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	20.0 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 5th August 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.

View monthly summary

Daily Graph of Conditions

Wind direction

Air pollution

Wind rose

Webcam Summary of Cloud Conditions

Full resolution images at up-to 5 minute intervals