Dominica weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Dominica in September. Check more long-term weather averages for Dominica in September before you book your next holiday to Dominica in 2025/2026.

  • 31°C maximum daytime temperature in September in Dominica (Roseau)31
    31°C max day temperature
  • 7 hours of sunshine per day
  • 23 days with some rainfall in September in Dominica (Roseau)23
    23 days with some rainfall
  • 23°C minimum night-time temperature in September in Dominica (Roseau)23
    23°C min night temperature
  • 12 hours of daylight per day in September in Dominica (Roseau)12
    12 hours of daylight per day
  • Very high heat & humidity in September in Dominica (Roseau)VH
    Very High heat & humidity
  • 250 mm monthly rainfall in September in Dominica (Roseau)250
    250 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Dominica (Roseau)11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Dominica (Roseau)29
    29°C sea temperature

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The September weather guide for Dominica (Roseau) 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.

Top Dominica destinations

Below are average maximum temperatures at popular countries, regions and places in Dominica in September. Select a holiday destination to see more weather parameters.

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

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How hot is it in Dominica in September?

Daytime temperatures usually reach 31°C in Roseau, Dominica in September with very high heat and humidity, falling to 23°C at night.

How sunny is it in Dominica in September?

There are normally 7 hours of bright sunshine each day in Roseau, Dominica in September - that's 59% of daylight hours.

How warm is the sea around Dominica in September?

The average sea temperature around Roseau, Dominica in September is 29°C.

Does it rain in Dominica in September?

There are usually 23 days with some rain in Roseau, Dominica in September and the average monthly rainfall is 250mm.

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

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

Dominica September sunrise & sunset times

Browse the sunrise and sunset times for Dominica in September 2025. Select a month to view Dominica sunrise and sunset times for the next 12 months. The Dominica sunrise and sunset times shown below are for Roseau.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:53 18:18
Monday, 15th September 2025 05:54 18:07
Tuesday, 30th September 2025 05:55 17:55

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