Saipan Weather in September
September in Saipan averages 30°C (86°F) during the day and 27°C (81°F) at night. September is part of the rainy season, with around 322 mm (13 in) of rainfall and frequent showers.
Rainfall in Saipan in September
As part of the rainy season, Saipan sees around 19 days of rain in September, with an average of 322 mm (13 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Saipan in September
In September, expect high temperatures in Saipan, with highs of 30°C (86°F) and lows of 27°C (81°F) at night. This kind of day-to-night contrast is typical for this time of year. Nights remain warm at around 27°C (81°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.September in Saipan has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Northern Mariana Islands, check out our Saipan's climate page.
Saipan Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
65%
Precipitation
322 mm (13 in)
Rainy days
19 days
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Saipan typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Historical weather for Saipan in September
Browse day-by-day weather records for Saipan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saipan historical weather extremes in September
Our historical data for Saipan spans 1992 to 2025, revealing these weather extremes.
- The warmest day in September was on September 14, 1994, with a maximum of 34°C (93°F).
- The coldest September day was on September 13, 2007, with a maximum of 26°C (79°F).
- Saipan registered its coldest September night on September 27, 1997, with temperatures dropping to 22°C (72°F).
Best Places in Northern Mariana Islands in September
Find out more about the weather in Northern Mariana Islands and which places have the best travel conditions in this month. See all of Northern Mariana Islands in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Saipan in September
Warm but pleasant conditions in Saipan in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.What To Do in Saipan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Northern Mariana Islands, check out our Saipan's climate page.
See the full Saipan climate overview or explore weather in Northern Mariana Islands.
