Saipan weather in September
September in Saipan: hot, soaked, with clean air — a good time to visit.
#10 of 12 months in Saipan · #475 of 604 destinations to visit in September · comfort 65/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Saipan climate normals — September
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 318 mm / 12.5 in | ⛈ soaked |
| Rainy days | 27 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12.2 h | |
| Wind | 25 km/h / 16 mph | |
| Air quality (US AQI) | 24 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Saipan?
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Saipan in September — FAQ
- Is September a good time to visit Saipan?
- September in Saipan: hot, soaked, with clean air — a good time to visit. It ranks #10 of 12 months for Saipan on SeasonMap's comfort score (65/100).
- What is the weather like in Saipan in September?
- In September, Saipan averages a daily high of 27.6°C and a low of 25.2°C, with about 318.3 mm of rain over roughly 26.6 rainy days.
- What is the air quality in Saipan in September?
- Saipan has a mean US Air Quality Index of about 24 in September.