Daejeon weather in September
September is one of the best months to visit Daejeon: highs of 24°C (76°F) and about 134 mm (5.3 in) of rain on average. Nights average 15°C (59°F) and cloud cover 65% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 4th warmest. Compared with August, it is cooler and drier; October brings highs of 18°C (65°F) and 54 mm (2.1 in) of rain.
Figures are long-term averages for Daejeon, the largest city in Daejeon. See below for other places.
Is September a good time to visit Daejeon?
best month Weather score 65/100.
Yes. September is one of the best months for weather in Daejeon.
Does it rain a lot in Daejeon in September?
Some rain is normal: about 134 mm (5.3 in) falls in an average September. It is the 4th wettest month of the year.
How warm is Daejeon in September?
Days average 24°C (76°F) and nights 15°C (59°F).
Daejeon weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 1°C (34°F) | -8°C (17°F) | 24 mm | 56% | least pleasant |
| February | 4°C (39°F) | -6°C (21°F) | 34 mm | 55% | least pleasant |
| March | 10°C (50°F) | -2°C (28°F) | 46 mm | 53% | fair |
| April | 17°C (63°F) | 4°C (39°F) | 81 mm | 56% | best |
| May | 23°C (74°F) | 10°C (50°F) | 80 mm | 58% | best |
| June | 28°C (82°F) | 16°C (60°F) | 134 mm | 70% | best |
| July | 28°C (83°F) | 20°C (68°F) | 316 mm | 78% | least pleasant |
| August | 29°C (84°F) | 21°C (69°F) | 255 mm | 71% | least pleasant |
| September | 24°C (76°F) | 15°C (59°F) | 134 mm | 65% | best |
| October | 18°C (65°F) | 7°C (45°F) | 54 mm | 50% | best |
| November | 11°C (51°F) | 1°C (33°F) | 41 mm | 53% | fair |
| December | 3°C (37°F) | -6°C (21°F) | 26 mm | 54% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months