Cheonan Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to chilly in Cheonan. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 4°C (39°F) in January.

Nighttime temperatures range from 22°C (72°F) in August to -5°C (23°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Cheonan has a relatively rain/snowy climate with high precipitation levels, averaging 1195 mm (47 in) of rain/snowfall annually. The seasons in Cheonan bring significant changes in precipitation. The wettest month, July, receives heavy rainfall, with an average of 265 mm (10 in) of precipitation. This rainfall is distributed across 15 rainy days.

In contrast, the driest month, January, experiences much less snow/rainfall, totaling 25 mm (1 in) over 9 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Cheonan Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Cheonan enjoys sunny spells year-round. May sees up to 8.3 hours of daily sunshine, perfect for a sunny trip. December, the least sunny month, still offers a generous 5.3 hours of sun despite this cloudier time of the year.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Cheonan.

The city experiences its highest humidity in July, reaching 78%. In April, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year