Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The advent of September presents an average high-temperature of a comfortable 18.7°C (65.7°F), maintaining a close correlation with the preceding month. The nights of September in Streatham anticipate an average low-temperature of 11.2°C (52.2°F).Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.1 days. Throughout September, 25mm (0.98") of precipitation is accumulated. In Streatham, during the entire year, the rain falls for 162.7 days and collects up to 388mm (15.28") of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Streatham is 12h and 38min.On the first day of September in Streatham, sunrise is at 6:14 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:40 pm BST.
Sunshine
In September, the average sunshine is 7.5h.UV index
In Streatham, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are the temperatures in Streatham in September?
What is the average humidity in September in Streatham?
How many days does it rain in September in Streatham?
When it does not snow in Streatham?
What is the average length of the day in September in Streatham?
When are sunrise and sunset in September in Streatham?
How long on average sun shines in September in Streatham?
What is the UV index reading in September in Streatham?
Average temperature in September
Streatham, United Kingdom
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in September: 11.2°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.4°C).
Average pressure in September
Streatham, United Kingdom
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in September
Streatham, United Kingdom
- Average wind speed in September: 12.8km/h
The windiest month (with the highest average wind speed) is February (17.5km/h).
The calmest months (with the lowest average wind speed) are July, August and September (12.8km/h).
Average humidity in September
Streatham, United Kingdom
- Average humidity in September: 78%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in September
Streatham, United Kingdom
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is December (47mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Streatham, United Kingdom
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is September (11.1 days).
Average snowfall in September
Streatham, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (25mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Streatham, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Streatham, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 3min
The months with the most sunshine are July and August (Average sunshine: 8h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Streatham, United Kingdom
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is February (12.3 days).
Average UV index in September
Streatham, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Streatham, United Kingdom
- Average cloud cover in September: 47
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 47).
Average visibility in September
Streatham, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
Streatham, United Kingdom
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