September weather forecast
Bournemouth, United Kingdom

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Weather in September

As summer gives way to autumn in Bournemouth, September ushers in cooler weather. From August to September, there is a downward shift in temperatures, shortening day length, and a slight uptick in cloud coverage. On a high note, the average sea temperature lingers at 17.3°C (63.1°F) in September, maintaining the allure of coastal activities. The incoming autumn echo in the air signals the transitioning of seasons, adding a different flavor to Bournemouth's landscape.

Temperature

The weather in Bournemouth during September records an average high-temperature of a still enjoyable 17.5°C (63.5°F), closely mirroring the preceding month. Bournemouth, in September, logs an average low-temperature of 12.7°C (54.9°F), a subtle step down from daytime readings.

Humidity

April, May, July and September, with an average relative humidity of 81%, are the least humid months in Bournemouth.

Rainfall

In Bournemouth, during September, the rain falls for 11.4 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, in Bournemouth, there are 162.1 rainfall days, and 328mm (12.91") of precipitation is accumulated.

Snowfall

In Bournemouth, snow does not fall in March through October.

Sea temperature

With an average sea temperature of 17.3°C (63.1°F), September is the month with the warmest seawater in Bournemouth.
Note: A majority do not enjoy swimming in water at 17.3°C (63.1°F). The difficulty in controlling breathing increases progressively as the temperature dips below 21°C (69.8°F).

Daylight

The average length of the day in September in Bournemouth, United Kingdom, is 12h and 37min.
On the first day of September, sunrise is at 6:22 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:47 pm BST.

Sunshine

In Bournemouth, the average sunshine in September is 8.2h.

UV index

In September, the average daily maximum UV index in Bournemouth, United Kingdom, is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Take precautions - Protection against sunburn is recommended. To guard against the harmful effects of the Sun, minimize exposure during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Frequently asked questions

What is the temperature in September in Bournemouth?

Bournemouth in September has an average high-temperature of 17.5°C (63.5°F) and an average low-temperature of 12.7°C (54.9°F).

What are the least humid months in Bournemouth?

April, May, July and September, with an average relative humidity of 81%, are the least humid months.

What is the average humidity in September in Bournemouth?

In Bournemouth, United Kingdom, the average relative humidity in September is 81%.

How many days does it rain in September in Bournemouth?

In September, in Bournemouth, the rain falls for 11.4 days. Throughout September, 21mm (0.83") of precipitation is accumulated.

When it does not snow in Bournemouth?

In Bournemouth, United Kingdom, snow does not fall in March through October.

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

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

What is the sea water temperature in September in Bournemouth?

In Bournemouth, in September, the average water temperature 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 Bournemouth?

In September, the average day length in Bournemouth is 12h and 37min.

What time are sunrise and sunset in September in Bournemouth?

In September, on the first day of the month, sunrise is at 6:22 am and sunset at 7:52 pm. On the last day of the month, in Bournemouth, sunrise is at 7:07 am and sunset at 6:47 pm BST.

How long on average sun shines in September in Bournemouth?

In Bournemouth, the average sunshine duration in September is 8.2h.

What is the UV index intensity in September in Bournemouth?

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Bournemouth, United Kingdom

Average temperature in September - Bournemouth, United Kingdom
  • Average high temperature in September: 17.5°C

The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is February (7.9°C).

  • Average low temperature in September: 12.7°C

The month with the highest average low temperature is August (14.4°C).
The coldest month (with the lowest average low temperature) is February (4.6°C).

Average pressure in September
Bournemouth, United Kingdom

Average pressure in September - Bournemouth, United Kingdom
  • Average pressure in September: 1017.2mbar

The month with the highest atmospheric pressure is September (1017.2mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).

Average wind speed in September
Bournemouth, United Kingdom

Average wind speed in September - Bournemouth, United Kingdom
  • Average wind speed in September: 18.9km/h

The windiest month (with the highest average wind speed) is December (24.3km/h).
The calmest month (with the lowest average wind speed) is July (16.7km/h).

Average humidity in September
Bournemouth, United Kingdom

Average humidity in September - Bournemouth, United Kingdom
  • Average humidity in September: 81%

The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are April, May, July and September (81%).

Average rainfall in September
Bournemouth, United Kingdom

Average rainfall in September - Bournemouth, United Kingdom
  • Average rainfall in September: 21mm

The wettest month (with the highest rainfall) is November (46mm).
The driest month (with the least rainfall) is May (17mm).

Average rainfall days in September
Bournemouth, United Kingdom

Average rainfall days in September - Bournemouth, United Kingdom
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is November (17.6 days).
The month with the least rainy days is May (11.3 days).

Average snowfall in September
Bournemouth, United Kingdom

Average snowfall in September - Bournemouth, United Kingdom
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (5mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).

Average snowfall days in September
Bournemouth, United Kingdom

Average snowfall days in September - Bournemouth, United Kingdom
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September
Bournemouth, United Kingdom

Average sea temperature in September - Bournemouth, 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 (8.7°C).

Average daylight in September /
Average sunshine in September
Bournemouth, United Kingdom

Average daylight in September / Average sunshine in September - Bournemouth, United Kingdom
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is July (Average sunshine: 9h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

Average sunshine days in September
Bournemouth, United Kingdom

Average sunshine days in September - Bournemouth, United Kingdom
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is May (15.9 days).
The month with the least sunshine days is November (9.1 days).

Average UV index in September
Bournemouth, United Kingdom

Average UV index in September - Bournemouth, 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 and February (UV index 2).

Average cloud cover in September
Bournemouth, United Kingdom

Average cloud cover in September - Bournemouth, United Kingdom
  • Average cloud cover in September: 42

The month with the most cloud cover is November (Cloud cover 58).
The months with the least cloud cover are July and September (Cloud cover 42).

Average visibility in September
Bournemouth, United Kingdom

Average visibility in September - Bournemouth, United Kingdom
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

Bournemouth, United Kingdom

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