Click on a day for an hourly weather forecast
The weather in Okayama in September is hot. The average temperatures are between 21°C and 28°C.
You can expect about 3 to 8 days of rain in Okayama during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Okayama in September 2025.
If you’re planning to visit Okayama in the near future, we highly recommend that you review the 14 day weather forecast for Okayama before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 3° | 6 | 20 | 5 | 35 mm | Bad | Okayama in January |
| February | 10° / 4° | 6 | 19 | 3 | 49 mm | Bad | Okayama in February |
| March | 13° / 6° | 5 | 26 | 0 | 61 mm | Ok | Okayama in March |
| April | 18° / 10° | 5 | 25 | 0 | 72 mm | Good | Okayama in April |
| May | 23° / 15° | 5 | 26 | 0 | 75 mm | Perfect | Okayama in May |
| June | 26° / 19° | 8 | 22 | 0 | 152 mm | Good | Okayama in June |
| July | 30° / 24° | 8 | 23 | 0 | 176 mm | Ok | Okayama in July |
| August | 31° / 25° | 6 | 25 | 0 | 169 mm | Good | Okayama in August |
| September | 28° / 21° | 6 | 24 | 0 | 147 mm | Perfect | Okayama in September |
| October | 22° / 16° | 5 | 26 | 0 | 100 mm | Good | Okayama in October |
| November | 17° / 11° | 3 | 27 | 0 | 44 mm | Good | Okayama in November |
| December | 11° / 6° | 5 | 24 | 2 | 47 mm | Bad | Okayama in December |