Saipan weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Saipan in September. Check more long-term weather averages for Saipan in September before you book your next holiday to Northern Mariana Islands in 2025/2026.

  • 31°C maximum daytime temperature in September in Saipan31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 19 days with some rainfall in September in Saipan19
    19 days with some rainfall
  • 25°C minimum night-time temperature in September in Saipan25
    25°C min night temperature
  • 12 hours of daylight per day in September in Saipan12
    12 hours of daylight per day
  • Very high heat & humidity in September in SaipanVH
    Very High heat & humidity
  • 325 mm monthly rainfall in September in Saipan325
    325 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Saipan11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Saipan29
    29°C sea temperature

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

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

How sunny is it in Saipan in September?

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

How warm is the sea around Saipan in September?

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

Does it rain in Saipan in September?

There are usually 19 days with some rain in Saipan in September and the average monthly rainfall is 325mm.

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

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

Saipan September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:04 18:29
Monday, 15th September 2025 06:06 18:19
Tuesday, 30th September 2025 06:07 18:07

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