Saipan weather in September
September is one of the least pleasant months in Saipan: highs of 29°C (84°F) and about 262 mm (10.3 in) of rain on average. Nights average 28°C (83°F) and cloud cover 81% (NASA POWER, 2001–2025 averages). It is the 2nd wettest month of the year and the 4th warmest. Compared with August, it is about as warm and about as wet; October brings highs of 29°C (84°F) and 226 mm (8.9 in) of rain.
Figures are long-term averages for Saipan, the largest city in Saipan. See below for other places.
Is September a good time to visit Saipan?
least pleasant month Weather score 40/100.
September is one of the least pleasant months for weather in Saipan. For better conditions, consider Nov–Jun.
Does it rain a lot in Saipan in September?
Yes, it is one of the rainy months: about 262 mm (10.3 in) falls in an average September. It is the 2nd wettest month of the year.
How warm is Saipan in September?
Days average 29°C (84°F) and nights 28°C (83°F).
Saipan weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 28°C (82°F) | 27°C (80°F) | 65 mm | 61% | best |
| February | 27°C (81°F) | 27°C (80°F) | 38 mm | 59% | best |
| March | 28°C (82°F) | 27°C (80°F) | 32 mm | 51% | best |
| April | 28°C (83°F) | 27°C (81°F) | 45 mm | 44% | best |
| May | 29°C (84°F) | 28°C (82°F) | 47 mm | 44% | best |
| June | 29°C (84°F) | 28°C (83°F) | 74 mm | 49% | best |
| July | 29°C (84°F) | 28°C (83°F) | 154 mm | 71% | fair |
| August | 29°C (84°F) | 28°C (83°F) | 302 mm | 84% | least pleasant |
| September | 29°C (84°F) | 28°C (83°F) | 262 mm | 81% | least pleasant |
| October | 29°C (84°F) | 28°C (83°F) | 226 mm | 67% | fair |
| November | 29°C (84°F) | 28°C (83°F) | 103 mm | 47% | best |
| December | 28°C (83°F) | 28°C (82°F) | 59 mm | 48% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months