Cheonan Climate by Month
Cheonan, Chungcheongnam-do, South Korea
Hot summers and cold winters, with most rain from May to September.
Cheonan has hot summers and cold winters, with most rain from May to September. Expect highs of 87°F (31°C) in August and 37°F (3°C) in January, with the coldest nights (January) near 18°F (-8°C). Of the 47 in (1201 mm) of rain in a typical year, 76% falls from May to September.
- Warmest month
- 87°F(31°C)
- Average high, August
- Coldest nights
- 18°F(-8°C)
- Average low, January
- Rain per year
- 47 in(1201 mm)
- Wettest: July
- Humidity
- 65%
- Sunniest: May
Best and worst months in Cheonan
Best for weatherMay is the best time for weather in Cheonan: highs near 76°F (25°C) and about 3.2 in (82 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 37°F (3°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Cheonan weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 37°F(3°C) | 18°F(-8°C) | 0.9 in(22 mm) | 58% | 2.4 |
| FebFebruary | 42°F(6°C) | 22°F(-5°C) | 1.1 in(28 mm) | 65% | 3.3 |
| MarMarch | 53°F(12°C) | 31°F(0°C) | 1.7 in(43 mm) | 54% | 4.2 |
| AprApril | 66°F(19°C) | 42°F(6°C) | 3.1 in(78 mm) | 56% | 5.1 |
| MayMayBest | 76°F(25°C) | 54°F(12°C) | 3.2 in(82 mm) | 57% | 5.6 |
| JunJune | 83°F(28°C) | 64°F(18°C) | 5.2 in(132 mm) | 64% | 5.4 |
| JulJuly | 86°F(30°C) | 71°F(22°C) | 12 in(300 mm) | 75% | 4.4 |
| AugAugust | 87°F(31°C) | 71°F(22°C) | 10 in(261 mm) | 76% | 4.4 |
| SepSeptember | 79°F(26°C) | 60°F(16°C) | 5.3 in(134 mm) | 72% | 4.1 |
| OctOctober | 69°F(21°C) | 46°F(8°C) | 2.0 in(52 mm) | 68% | 3.6 |
| NovNovember | 55°F(13°C) | 34°F(1°C) | 1.7 in(43 mm) | 71% | 2.6 |
| DecDecember | 41°F(5°C) | 22°F(-5°C) | 1.0 in(26 mm) | 67% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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