Plymouth weather in September 2025

Expect daytime maximum temperatures of 30°C in Plymouth, Montserrat in September and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 18 days with some rainfall and typically 203 mm of rainfall in the month.

  • 30°C maximum daytime temperature in September in Plymouth30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 18 days with some rainfall in September in Plymouth18
    18 days with some rainfall
  • 23°C minimum night-time temperature in September in Plymouth23
    23°C min night temperature
  • 12 hours of daylight per day in September in Plymouth12
    12 hours of daylight per day
  • High heat & humidity in September in PlymouthH
    High heat & humidity
  • 203 mm monthly rainfall in September in Plymouth203
    203 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Plymouth11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Plymouth29
    29°C sea temperature

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The September weather guide for Montserrat, represented by Plymouth, (Plymouth) 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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How hot is it in Plymouth in September?

Daytime temperatures usually reach 30°C in Plymouth in September with high heat and humidity, falling to 23°C at night.

How sunny is it in Plymouth in September?

There are normally 7 hours of bright sunshine each day in Plymouth in September - that's 61% of daylight hours.

How warm is the sea around Plymouth in September?

The average sea temperature around Plymouth in September is 29°C.

Does it rain in Plymouth in September?

There are usually 18 days with some rain in Plymouth in September and the average monthly rainfall is 203mm.

What is the chance of a hurricane in Plymouth in September?

On average 1.2 days in September in Plymouth are likely to be affected by the passage of one or more tropical storms.

Plymouth September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:56 18:22
Monday, 15th September 2025 05:57 18:10
Tuesday, 30th September 2025 05:59 17:58

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