Falmouth weather in September 2025

Expect 17°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Falmouth in September. Check more long-term weather averages for Falmouth in September before you book your next holiday to England in 2025/2026.

  • 17°C maximum daytime temperature in September in Falmouth17
    17°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in September in Falmouth15
    15 days with some rainfall
  • 11°C minimum night-time temperature in September in Falmouth11
    11°C min night temperature
  • 13 hours of daylight per day in September in Falmouth13
    13 hours of daylight per day
  • No heat & humidity in September in Falmouth0
    No heat & humidity
  • 86 mm monthly rainfall in September in Falmouth86
    86 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Falmouth4
    4 (Moderate) UV index
  • 16°C sea temperature in September in Falmouth16
    16°C sea temperature

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The September weather guide for England (Falmouth) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about England

How warm is it in Falmouth in September?

Daytime temperatures usually reach 17°C in Falmouth in September, falling to 11°C at night.

How sunny is it in Falmouth in September?

There are normally 5 hours of bright sunshine each day in Falmouth in September - that's 40% of daylight hours.

How warm is the sea around Falmouth in September?

The average sea temperature around Falmouth in September is 16°C.

Does it rain in Falmouth in September?

There are usually 15 days with some rain in Falmouth in September and the average monthly rainfall is 86mm.

Falmouth September sunrise & sunset times

Browse the sunrise and sunset times for Falmouth in September 2025. Select a month to view Falmouth sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:35 19:04
Monday, 15th September 2025 05:56 18:34
Tuesday, 30th September 2025 06:19 18:00

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