Okayama weather in September
September is a fair month to visit Okayama: highs of 27°C (81°F) and about 187 mm (7.4 in) of rain on average. Nights average 20°C (69°F) and cloud cover 70% (NASA POWER, 2001–2025 averages). It is the 3rd wettest month of the year and the 3rd warmest. Compared with August, it is cooler and wetter; October brings highs of 22°C (71°F) and 130 mm (5.1 in) of rain.
Figures are long-term averages for Okayama, the largest city in Okayama. See below for other places.
Is September a good time to visit Okayama?
fair month Weather score 55/100.
September is a fair month in Okayama. The weather is usually best in Apr–May, Aug, Oct–Nov.
Does it rain a lot in Okayama in September?
Yes, it is one of the rainy months: about 187 mm (7.4 in) falls in an average September. It is the 3rd wettest month of the year.
How warm is Okayama in September?
Days average 27°C (81°F) and nights 20°C (69°F).
Okayama weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 8°C (46°F) | 1°C (34°F) | 54 mm | 72% | least pleasant |
| February | 10°C (49°F) | 2°C (35°F) | 68 mm | 71% | least pleasant |
| March | 13°C (56°F) | 4°C (39°F) | 96 mm | 65% | fair |
| April | 18°C (65°F) | 9°C (47°F) | 106 mm | 64% | best |
| May | 23°C (73°F) | 14°C (56°F) | 132 mm | 67% | best |
| June | 26°C (79°F) | 18°C (65°F) | 195 mm | 79% | fair |
| July | 29°C (85°F) | 23°C (73°F) | 219 mm | 72% | fair |
| August | 31°C (87°F) | 24°C (75°F) | 138 mm | 64% | best |
| September | 27°C (81°F) | 20°C (69°F) | 187 mm | 70% | fair |
| October | 22°C (71°F) | 14°C (58°F) | 130 mm | 62% | best |
| November | 16°C (61°F) | 9°C (47°F) | 70 mm | 62% | best |
| December | 10°C (51°F) | 3°C (38°F) | 70 mm | 69% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Okayama in September
Weather can differ a lot within Okayama: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Okayama | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |
| Kurashiki | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |
| Tsuyama | 25°C (77°F) | 16°C (61°F) | 179 mm | best |
| Sōja | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |
| Tamano | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |
| Kasaoka | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |
| Akaiwa | 25°C (77°F) | 16°C (61°F) | 179 mm | best |
| Maniwa | 25°C (77°F) | 16°C (61°F) | 179 mm | best |
| Ibara | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |
| Bizen | 25°C (78°F) | 18°C (64°F) | 189 mm | fair |
| Setouchi | 27°C (80°F) | 22°C (71°F) | 193 mm | fair |
| Asakuchi | 27°C (81°F) | 20°C (69°F) | 187 mm | fair |