Roseau weather in September 2025

Expect daytime maximum temperatures of 88°F in Roseau, Dominica in September and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 23 days with some rainfall and typically 9.8 inches of rainfall in the month.

  • 88°F maximum daytime temperature in September in Roseau88
    88°F max day temperature
  • 7 hours of sunshine per day
  • 23 days with some rainfall in September in Roseau23
    23 days with some rainfall
  • 73°F minimum night-time temperature in September in Roseau73
    73°F min night temperature
  • 12 hours of daylight per day in September in Roseau12
    12 hours of daylight per day
  • Very high heat & humidity in September in RoseauVH
    Very High heat & humidity
  • 9.8 inches monthly rainfall in September in Roseau9.8
    9.8 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Roseau11
    11+ (Extreme) UV index
  • 84°F sea temperature in September in Roseau84
    84°F sea temperature

More about Roseau

Roseau by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Dominica

Marella Cruises: up to 4% off ocean cruises

  • Book online & save up to 4% on Marella Cruises
  • Discount varies by season. Book online with TUI
  • Destinations across the Med, Caribbean & USA
Go to Marella Cruises deal >>

View all Marella Cruises offers

Marella CruisesCruise deal finder

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.

Metric (°C)  |  Imperial (°F)

Back to top

How hot is it in Roseau in September?

Daytime temperatures usually reach 88°F in Roseau in September with very high heat and humidity, falling to 73°F at night.

How sunny is it in Roseau in September?

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

How warm is the sea around Roseau in September?

The average sea temperature around Roseau in September is 84°F.

Does it rain in Roseau in September?

There are usually 23 days with some rain in Roseau in September and the average monthly rainfall is 9.8 inches.

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

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

Roseau September sunrise & sunset times

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

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^