Vieques weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Vieques in September. Check more long-term weather averages for Vieques in September before you book your next holiday to Puerto Rico in 2025/2026.

  • 31°C maximum daytime temperature in September in Vieques31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 18 days with some rainfall in September in Vieques18
    18 days with some rainfall
  • 24°C minimum night-time temperature in September in Vieques24
    24°C min night temperature
  • 12 hours of daylight per day in September in Vieques12
    12 hours of daylight per day
  • High heat & humidity in September in ViequesH
    High heat & humidity
  • 179 mm monthly rainfall in September in Vieques179
    179 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Vieques11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Vieques29
    29°C sea temperature

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The September weather guide for Puerto Rico (Vieques) 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 Puerto Rico

How hot is it in Vieques in September?

Daytime temperatures usually reach 31°C in Vieques in September with high heat and humidity, falling to 24°C at night.

How sunny is it in Vieques in September?

There are normally 8 hours of bright sunshine each day in Vieques in September - that's 64% of daylight hours.

How warm is the sea around Vieques in September?

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

Does it rain in Vieques in September?

There are usually 18 days with some rain in Vieques in September and the average monthly rainfall is 179mm.

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

On average 1.1 days in September in Vieques are likely to be affected by the passage of one or more tropical storms.

Vieques September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:09 18:37
Monday, 15th September 2025 06:11 18:25
Tuesday, 30th September 2025 06:14 18:12

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