Daily Report for 25th June 2016

Measure	Value (anomaly)	Time	Month cumul.	Record High	Record Low
Minimum Temperature	12.9 °C (+0.1)	05:09	13.1 °C (+1.2)	20.3 °C (+7.5), 2026	8.3 °C (-4.5), 2013
Maximum Temperature	20.3 °C (-1.5)	15:25	20.2 °C (-0.6)	31.9 °C (+10.1), 2026	20.2 °C (-1.6), 2013
Mean Temperature	16.1 °C (-0.7)		16.3 °C (+0.3)	26.3 °C, 2026	15.0 °C, 2013
Minimum Humidity	47%	15:16	61%	78%, 2019	25%, 2018
Maximum Humidity	82%	06:01	88%	95%, 2011	69%, 2010
Mean Humidity	72%		77%	88%, 2019	51%, 2018
Minimum Pressure	1013 hPa	15:42	1012 hPa	1026 hPa, 2013	1005 hPa, 2022
Maximum Pressure	1016 hPa	12:02	1016 hPa	1030 hPa, 2013	1011 hPa, 2022
Mean Pressure	1014 hPa		1014 hPa	1029 hPa, 2013	1009 hPa, 2022
Mean Wind Speed	4.7 mph (+0.3)		3.5 mph (-0.9)	6.9 mph, 2022	1.9 mph, 2018
Maximum Wind Speed	16.9 mph	13:26	10.8 mph	18.0 mph, 2023	7.0 mph, 2018
Maximum Gust	24.2 mph	13:23	16.4 mph	27.6 mph, 2023	10.9 mph, 2013
Mean Wind Direction	n/a		S	NNW, 2013	NNE, 2019
Rainfall	3.2 mm		85.3 mm (218%)	6.8 mm, 2019	0.0 mm, 2009
Maximum Hourly Rain	2.2 mm	16:12	1.7 mm	4.4 mm, 2019	0.2 mm, 2021
Maximum 10-min Rain	1.4 mm	16:12	0.8 mm	1.4 mm, 2016	0.2 mm, 2021
Maximum Rain Rate	36 mm/h	16:10	16 mm/h	36 mm/h, 2016	1.6 mm/h, 2011
Minimum Dew Point	7.9 °C	14:42	9.3 °C	17.1 °C, 2026	3.6 °C, 2013
Maximum Dew Point	12.5 °C	16:37	14.4 °C	21.8 °C, 2026	8.7 °C, 2013
Mean Dew Point	10.8 °C		11.9 °C	19.6 °C, 2026	5.8 °C, 2013
Measure	Value	Time	Month cumul.	Record High	Record Low
Night Minimum (21-09)	12.9 °C	05:09	13.1 °C	20.3 °C, 2026	8.3 °C, 2013
Day Maximum (09-21)	20.3 °C	15:25	20.2 °C	31.9 °C, 2026	20.2 °C, 2013
Max 10m Temp Rise	0.7 °C	16:36	0.5 °C	0.9 °C, 2023	0.4 °C, 2011
Max 1hr Temp Rise	1.9 °C	12:42	1.8 °C	4.3 °C, 2024	1.4 °C, 2011
Max 1hr Hum Rise	21%	16:27	8%	21%, 2016	5%, 2011
Max 10m Temp Fall	1.1 °C	15:55	0.6 °C	1.1 °C, 2016	0.3 °C, 2025
Max 1hr Temp Fall	3.1 °C	16:17	1.8 °C	3.1 °C, 2016	1.3 °C, 2019
Max 1hr Hum Fall	10%	12:46	9%	22%, 2024	6%, 2010
Max 10m Wind Speed	13.4 mph	13:31	8.1 mph	14.1 mph, 2023	5.0 mph, 2010
Minimum Feels-like	14.0 °C	04:59	14.4 °C	26.0 °C, 2026	7.2 °C, 2013
Maximum Feels-like	21.6 °C	15:19	23.1 °C	40.9 °C, 2026	20.2 °C, 2013
Mean Feels-like	17.7 °C		18.6 °C	33.5 °C, 2026	15.0 °C, 2013
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	7.4 °C (-1.7)		7.1 °C	16.7 °C, 2018	6.7 °C, 2019
Humidity Range	35%		27%	61%, 2018	17%, 2019
Pressure Range	3 hPa		5 hPa	9 hPa, 2019	2 hPa, 2018

Observation	Detail
Sun Hours	7 hrs [46%]
Wet Hours	2 hrs
Cloud Cover	am: Mostly Sunny transitioned to Partly Cloudy pm: Mostly Cloudy transitioned to Partly Cloudy
Events	Hail (large stones), Thunder
Comments	"16 brief chickpea-size hail w thunder showers; 19 Sh"
Observer Absent?	Yes - observations may be unreliable
Pond Temperature	0.0 °C

Notes: Detailed daily weather report for Hampstead, NW3, London on 25th June 2016. 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 Report for 25th June 2016

Daily Graph of Conditions

Wind direction

Air pollution

Wind rose

Webcam Summary of Cloud Conditions