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Northern Mariana Islands weather in September 2025
Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Northern Mariana Islands in September. Check more long-term weather averages for Northern Mariana Islands in September before you book your next holiday to Northern Mariana Islands in 2025/2026.
- 3131°C max day temperature
- 5 hours of sunshine per day
- 1919 days with some rainfall
- 2525°C min night temperature
- 1212 hours of daylight per day
- VHVery High heat & humidity
- 325325 mm of monthly rainfall
- 1111+ (Extreme) UV index
- 2929°C sea temperature
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Recommended for the Northern Mariana Islands
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.
Top Northern Mariana Islands destinations
Below are average maximum temperatures at popular countries, regions and places in the Northern Mariana Islands in September. Select a holiday destination to see more weather parameters.
All Northern Mariana Islands destinations
Metric (°C / mm) | Imperial (°F / inches)
How hot is it in the Northern Mariana Islands in September?
Daytime temperatures usually reach 31°C in Saipan, Northern Mariana Islands in September with very high heat and humidity, falling to 25°C at night.
How sunny is it in the Northern Mariana Islands in September?
There are normally 5 hours of bright sunshine each day in Saipan, Northern Mariana Islands in September - that's 43% of daylight hours.
How warm is the sea around the Northern Mariana Islands in September?
The average sea temperature around Saipan, Northern Mariana Islands in September is 29°C.
Does it rain in the Northern Mariana Islands in September?
There are usually 19 days with some rain in Saipan, Northern Mariana Islands in September and the average monthly rainfall is 325mm.
What is the chance of a typhoon in the Northern Mariana Islands in September?
On average 2.5 days in September in Saipan, Northern Mariana Islands are likely to be affected by the passage of one or more tropical storms.
Northern Mariana Islands September sunrise & sunset times
Browse the sunrise and sunset times for Northern Mariana Islands in September 2025. Select a month to view Northern Mariana Islands sunrise and sunset times for the next 12 months. The Northern Mariana Islands sunrise and sunset times shown below are for Saipan.
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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