Click on a day for an hourly weather forecast
The temperatures in Oita in September are comfortable with low of 19°C and and high up to 25°C.
You can expect rain for roughly half of the month of September in Oita. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Oita in September 2025.
If you’re planning to visit Oita in the near future, we highly recommend that you review the 14 day weather forecast for Oita before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 1° | 4 | 27 | 0 | 21 mm | Ok | Oita in January |
| February | 9° / 2° | 6 | 22 | 0 | 32 mm | Ok | Oita in February |
| March | 13° / 5° | 7 | 24 | 0 | 38 mm | Ok | Oita in March |
| April | 18° / 9° | 7 | 23 | 0 | 42 mm | Good | Oita in April |
| May | 22° / 14° | 7 | 24 | 0 | 55 mm | Ok | Oita in May |
| June | 24° / 18° | 14 | 16 | 0 | 130 mm | Good | Oita in June |
| July | 28° / 22° | 13 | 18 | 0 | 99 mm | Good | Oita in July |
| August | 29° / 23° | 11 | 20 | 0 | 73 mm | Ok | Oita in August |
| September | 25° / 19° | 10 | 20 | 0 | 92 mm | Good | Oita in September |
| October | 21° / 14° | 6 | 26 | 0 | 56 mm | Good | Oita in October |
| November | 15° / 9° | 4 | 26 | 0 | 28 mm | Good | Oita in November |
| December | 9° / 3° | 4 | 27 | 0 | 21 mm | Ok | Oita in December |