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 arrival of September coincides with an average high-temperature of an enjoyable 18.9°C (66°F), indicating a minimal shift from August's 21.7°C (71.1°F). In Brentwood, an average temperature of 11.6°C (52.9°F) is noted during September nights.Humidity
In September, the average relative humidity is 77%.Rainfall
In Brentwood, United Kingdom, in September, during 9.1 rainfall days, 18mm (0.71") of precipitation is typically accumulated. In Brentwood, during the entire year, the rain falls for 150.3 days and collects up to 287mm (11.3") of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:45 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:38 pm BST.
Sunshine
In Brentwood, the average sunshine in September is 7.4h.UV index
The average daily maximum UV index in September in Brentwood is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Make use of precautions - Suggestions to resist sunburn are communicated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the usual temperature for Brentwood in September?
What is the average humidity in September in Brentwood?
How much does it rain in Brentwood in September?
When it does not snow in Brentwood?
What is the average length of the day in September in Brentwood?
When are sunrise and sunset in September in Brentwood?
How many hours of sunshine does Brentwood have in September?
What is the UV index intensity in September in Brentwood?
Average temperature in September
Brentwood, United Kingdom
- Average high temperature in September: 18.9°C
The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in September: 11.6°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is January (2.5°C).
Average pressure in September
Brentwood, United Kingdom
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).
Average wind speed in September
Brentwood, United Kingdom
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is February (17.9km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in September
Brentwood, United Kingdom
- Average humidity in September: 77%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (73%).
Average rainfall in September
Brentwood, United Kingdom
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is December (32mm).
The driest month (with the least rainfall) is April (15mm).
Average rainfall days in September
Brentwood, United Kingdom
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is September (9.1 days).
Average snowfall in September
Brentwood, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Brentwood, 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
Brentwood, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Brentwood, United Kingdom
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is September (17.8 days).
The month with the least sunshine days is February (12.2 days).
Average UV index in September
Brentwood, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Brentwood, 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
Brentwood, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Brentwood, United Kingdom
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