Daejeon, South Korea climate
Average temperatures, precipitation and all-time records for Daejeon, South Korea, with every day graded against ~45 years of local climate history (1981–2026). Its warmest month is August, averaging a high of 29°C, and its coldest is January, with an average low of -8°C.
Daejeon is South Korea's fifth-largest metropolis, with a population of nearly 1.5 million. Located in a central lowland valley between the Sobaek Mountains and the Geum River, the city is known both as a technology and research center, and for its close relationship with the natural environment. via Wikipedia
How today compares
Latest recorded day: 2026-07-21. Each reading placed on Daejeon, South Korea's own ±7-day seasonal distribution.
Daejeon average temperatures by month
Typical daily high and low, and average precipitation, for each month in Daejeon, South Korea, based on 1981–2026 records. The wettest month is July (10 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 1°C | -8°C | 0 mm |
| February | 4°C | -6°C | 3 mm |
| March | 10°C | -2°C | 3 mm |
| April | 17°C | 4°C | 3 mm |
| May | 23°C | 10°C | 3 mm |
| June | 28°C | 16°C | 5 mm |
| July | 28°C | 20°C | 10 mm |
| August | 29°C | 21°C | 8 mm |
| September | 24°C | 15°C | 5 mm |
| October | 19°C | 8°C | 3 mm |
| November | 11°C | 1°C | 3 mm |
| December | 4°C | -5°C | 0 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 39°C on 2018-08-15
- Coldest day on record: -22°C on 2001-01-14
Percentiles compare each day to Daejeon, South Korea's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →