Brighton
United Kingdom
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Brighton, United Kingdom

Brown sandy shores of Brighton Beach in the United Kingdom, with a background view of the city buildings, and people scattered on the shore
Brown sandy shores of Brighton Beach in the United Kingdom, with a background view of the city buildings, and people scattered on the shore
The first month of the autumn, September, is also an enjoyable month in Brighton, United Kingdom, with temperature in the range of an average high of 18°C (64.4°F) and an average low of 12°C (53.6°F).

Temperature

In Brighton, the average high-temperature in September marginally drops, from a pleasant 21°C (69.8°F) in August, to an enjoyable 18°C (64.4°F). In September, in Brighton, the average low-temperature is 12°C (53.6°F).

Rainfall

In September, the rain falls for 12 days. Throughout September, 67mm (2.6") of precipitation is accumulated. Throughout the year, there are 167 rainfall days, and 851mm (33.5") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 17.3°C (63.1°F), September is the month with the warmest seawater in Brighton.
Note: For most, swimming in 17.3°C (63.1°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In September, the average length of the day in Brighton is 12.6h.

Sunshine

In September, the average sunshine in Brighton, United Kingdom, is 5h.

UV index

In Brighton, United Kingdom, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Brighton?

In September, in Brighton, United Kingdom, the average high-temperature is 18°C (64.4°F), and the average low-temperature is 12°C (53.6°F).

How much does it rain in Brighton in September?

In Brighton, during September, the rain falls for 12 days and regularly aggregates up to 67mm (2.6") of precipitation.

What is the month with the warmest sea water in Brighton?

September is the month with the warmest seawater, with an average sea temperature of 17.3°C (63.1°F).

What is the sea water temperature in September in Brighton?

In September, the average sea temperature in Brighton is 17.3°C (63.1°F). Swimming in 17.3°C (63.1°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the average length of the day in September in Brighton?

The average length of the day in September in Brighton is 12.6h.

How many hours of sunshine does Brighton have in September?

In Brighton, United Kingdom, the average sunshine in September is 5h.

What is the UV index reading in September in Brighton?

The average daily maximum UV index in September in Brighton, United Kingdom, is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.
Average temperature in September - Brighton, United Kingdom
  • Average high temperature in September: 18°C

The warmest month (with the highest average high temperature) is August (21°C).
Months with the lowest average high temperature are January and February (8°C).

  • Average low temperature in September: 12°C

Months with the highest average low temperature are July and August (14°C).
Coldest months (with the lowest average low temperature) are January and February (3°C).

Average rainfall in September - Brighton, United Kingdom
  • Average rainfall in September: 67mm

The wettest month (with the highest rainfall) is October (105mm).
The driest month (with the lowest rainfall) is June (50mm).

Average rainfall days in September - Brighton, United Kingdom
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is January (18 days).
The month with the lowest number of rainy days is July (10 days).

Average sea temperature in September - Brighton, United Kingdom
  • Average sea temperature in September: 17.3°C

The best month for swimming (with the highest average sea temperature) is September (17.3°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).

Average daylight in September / Average sunshine in September - Brighton, United Kingdom
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.4h).
The month with shortest days is December (Average daylight: 8h).

  • Average sunshine in September: 5h

Months with most sunshine are May, June, July and August (Average sunshine: 7h).
Months with least sunshine are January, November and December (Average sunshine: 2).

Average UV index in September - Brighton, United Kingdom
  • Average UV index in September: 4

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).