Tinian weather in September 2025

Expect daytime maximum temperatures of 31°C in Tinian, Northern Mariana Islands in September and very high heat and humidity based on long-term weather averages. There are 5 hours of sunshine per day on average with 20 days with some rainfall and typically 325 mm of rainfall in the month.

  • 31°C maximum daytime temperature in September in Tinian31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 20 days with some rainfall in September in Tinian20
    20 days with some rainfall
  • 25°C minimum night-time temperature in September in Tinian25
    25°C min night temperature
  • 12 hours of daylight per day in September in Tinian12
    12 hours of daylight per day
  • Very high heat & humidity in September in TinianVH
    Very High heat & humidity
  • 325 mm monthly rainfall in September in Tinian325
    325 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Tinian11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Tinian29
    29°C sea temperature

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The September weather guide for Northern Mariana Islands (Tinian) 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 Tinian in September?

Daytime temperatures usually reach 31°C in Tinian in September with very high heat and humidity, falling to 25°C at night.

How sunny is it in Tinian in September?

There are normally 5 hours of bright sunshine each day in Tinian in September - that's 43% of daylight hours.

How warm is the sea around Tinian in September?

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

Does it rain in Tinian in September?

There are usually 20 days with some rain in Tinian in September and the average monthly rainfall is 325mm.

What is the chance of a typhoon in Tinian in September?

On average 2.5 days in September in Tinian are likely to be affected by the passage of one or more tropical storms.

Tinian September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:05 18:30
Monday, 15th September 2025 06:06 18:19
Tuesday, 30th September 2025 06:07 18:08

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