Falmouth
United Kingdom
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Falmouth, United Kingdom

September, the first month of the autumn, in Falmouth, is also an enjoyable month, with average temperature varying between 16.5°C (61.7°F) and 14.4°C (57.9°F).

Temperature

In September, the average high-temperature is almost the same as in August - a still comfortable 16.5°C (61.7°F). The average low-temperature, is 14.4°C (57.9°F).

Humidity

In September, the average relative humidity is 83%.

Rainfall

In Falmouth, it is raining for 9.9 days, with typically 19mm (0.75") of accumulated precipitation. In Falmouth, during the entire year, the rain falls for 159.4 days and collects up to 367mm (14.45") of precipitation.

Snowfall

January, March through November are months without snowfall in Falmouth.

Sea temperature

In Falmouth, in September, the average water temperature is 16.3°C (61.3°F).
Note: For most, swimming in 16.3°C (61.3°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 Falmouth is 12.6h.

Sunshine

The average sunshine in Falmouth, United Kingdom, is 7.6h.

UV index

The average daily maximum UV index in Falmouth is 4. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Falmouth?

In Falmouth, in September, the average high-temperature is 16.5°C (61.7°F), and the average low-temperature is 14.4°C (57.9°F).

What is the average humidity in September in Falmouth?

In September, the average relative humidity is 83%.

How many days does it rain in September in Falmouth?

In Falmouth, United Kingdom, during September, the rain falls for 9.9 days and regularly aggregates up to 19mm (0.75") of precipitation.

When it does not snow in Falmouth?

In Falmouth snow does not fall in January, March through November.

What is the sea water temperature in September in Falmouth?

In September, the average sea temperature is 16.3°C (61.3°F). For swimming, a surface water temperature of 16.3°C (61.3°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

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

In September, the average length of the day in Falmouth, United Kingdom, is 12.6h.

How many hours of sunshine does Falmouth have in September?

In Falmouth, United Kingdom, the average sunshine in September is 7.6h.

What is the UV index reading in September in Falmouth?

In September, the average daily maximum UV index in Falmouth is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Falmouth, United Kingdom
  • Average high temperature in September: 16.5°C

The warmest month (with the highest average high temperature) is August (17.6°C).
The month with the lowest average high temperature is February (9.3°C).

  • Average low temperature in September: 14.4°C

The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (6.9°C).

Average humidity in September - Falmouth, United Kingdom
  • Average humidity in September: 83%

Months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is February (79%).

Average rainfall in September - Falmouth, United Kingdom
  • Average rainfall in September: 19mm

The wettest month (with the highest rainfall) is November (55mm).
The driest month (with the least rainfall) is July (18mm).

Average rainfall days in September - Falmouth, United Kingdom
  • Average rainfall days in September: 9.9 days

The month with the highest number of rainy days is November (17.1 days).
The month with the least rainy days is September (9.9 days).

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

Months with the highest snowfall are February and December (1mm).
Months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0mm).

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

Months with the highest number of snowfall days are February and December (0.5 days).
Months with the least snowfall days are May, June, July, August, September, October and November (0 days).

Average sea temperature in September - Falmouth, United Kingdom
  • Average sea temperature in September: 16.3°C

The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (9.7°C).

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

The month with the longest days is June (Average daylight: 16.3h).
The month with the shortest days is December (Average daylight: 8.2h).

  • Average sunshine in September: 7.6h

Months with the most sunshine are April and July (Average sunshine: 8.5h).
Months with the least sunshine are January and November (Average sunshine: 4).

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

The month with the highest UV index is August (UV index 5).
The month with the lowest UV index is January (UV index 2).