Cheonan, Chungcheongnam-do, South Korea climate
Average temperatures, precipitation and all-time records for Cheonan, Chungcheongnam-do, South Korea, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 30°C, and its coldest is January, with an average low of -6°C.
Cheonan is the largest and most densely populated city of South Chungcheong Province, South Korea, and the third largest city in the Hoseo region after Daejeon and Cheongju. via Wikipedia
Cheonan average temperatures by month
Typical daily high and low, and average precipitation, for each month in Cheonan, Chungcheongnam-do, South Korea, based on 1980–2026 records. The wettest month is July (10 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 2°C | -6°C | 0 mm |
| February | 5°C | -3°C | 0 mm |
| March | 11°C | 1°C | 3 mm |
| April | 19°C | 7°C | 3 mm |
| May | 23°C | 13°C | 3 mm |
| June | 28°C | 18°C | 3 mm |
| July | 29°C | 22°C | 10 mm |
| August | 30°C | 23°C | 8 mm |
| September | 26°C | 17°C | 5 mm |
| October | 20°C | 10°C | 3 mm |
| November | 12°C | 3°C | 3 mm |
| December | 5°C | -4°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: 40°C on 2018-08-15
- Coldest day on record: -23°C on 2000-12-28
Percentiles compare each day to Cheonan, Chungcheongnam-do, 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 →