Santiago weather in September 2025

Expect 91°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Santiago in September. Check more long-term weather averages for Santiago in September before you book your next holiday to Dominican Republic in 2025/2026.

  • 91°F maximum daytime temperature in September in Santiago91
    91°F max day temperature
  • 7 hours of sunshine per day
  • 15 days with some rainfall in September in Santiago15
    15 days with some rainfall
  • 70°F minimum night-time temperature in September in Santiago70
    70°F min night temperature
  • 12 hours of daylight per day in September in Santiago12
    12 hours of daylight per day
  • Very high heat & humidity in September in SantiagoVH
    Very High heat & humidity
  • 4.1 inches monthly rainfall in September in Santiago4.1
    4.1 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Santiago11
    11+ (Extreme) UV index

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The September weather guide for Dominican Republic (Santiago) 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)

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More about the Dominican Republic

How hot is it in Santiago in September?

Daytime temperatures usually reach 91°F in Santiago in September with very high heat and humidity, falling to 70°F at night.

How sunny is it in Santiago in September?

There are normally 7 hours of bright sunshine each day in Santiago in September - that's 57% of daylight hours.

Does it rain in Santiago in September?

There are usually 15 days with some rain in Santiago in September and the average monthly rainfall is 4.1 inches.

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

On average 1 day in September in Santiago is likely to be affected by the passage of one or more tropical storms.

Santiago September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:28 18:57
Monday, 15th September 2025 06:30 18:45
Tuesday, 30th September 2025 06:33 18:32

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