Okinawa weather in September
September is a fair month to visit Okinawa: highs of 29°C (84°F) and about 191 mm (7.5 in) of rain on average. Nights average 28°C (82°F) and cloud cover 63% (NASA POWER, 2001–2025 averages). The sea averages 31°C (87°F). It is the 3rd wettest month of the year and the 3rd warmest. Compared with August, it is cooler and about as wet; October brings highs of 27°C (80°F) and 127 mm (5.0 in) of rain.
Is September a good time to visit Okinawa?
fair month Weather score 56/100.
September is a fair month in Okinawa. The weather is usually best in Jul, Oct–Mar.
Does it rain a lot in Okinawa in September?
Yes, it is one of the rainy months: about 191 mm (7.5 in) falls in an average September. It is the 3rd wettest month of the year.
How warm is Okinawa in September?
Days average 29°C (84°F) and nights 28°C (82°F).
Okinawa weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 19°C (67°F) | 17°C (63°F) | 69 mm | 85% | 21°C (69°F) | best |
| February | 20°C (67°F) | 18°C (64°F) | 59 mm | 82% | 21°C (69°F) | best |
| March | 21°C (69°F) | 18°C (65°F) | 94 mm | 81% | 21°C (70°F) | best |
| April | 23°C (73°F) | 21°C (69°F) | 140 mm | 82% | 23°C (73°F) | fair |
| May | 25°C (77°F) | 23°C (74°F) | 220 mm | 80% | 25°C (77°F) | fair |
| June | 27°C (81°F) | 26°C (79°F) | 311 mm | 79% | 28°C (82°F) | least pleasant |
| July | 29°C (85°F) | 28°C (83°F) | 141 mm | 59% | 30°C (87°F) | best |
| August | 30°C (85°F) | 29°C (83°F) | 179 mm | 59% | 31°C (88°F) | fair |
| September | 29°C (84°F) | 28°C (82°F) | 191 mm | 63% | 31°C (87°F) | fair |
| October | 27°C (80°F) | 25°C (77°F) | 127 mm | 67% | 29°C (84°F) | best |
| November | 24°C (75°F) | 23°C (73°F) | 87 mm | 78% | 26°C (79°F) | best |
| December | 21°C (70°F) | 19°C (67°F) | 72 mm | 84% | 23°C (73°F) | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months