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Cheonan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Cheonan.
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Climate overview of Cheonan
Cheonan, Chungcheongnam-Do, South Korea, experiences significant temperature variation throughout the year. Summers bring daytime highs of 31°C (88°F) in August, while winters cool to 4°C (39°F) in January.
The city has a wet climate, receiving around 1195 mm (47 in) of rain/snowfall per year. Despite the high annual total, it has a distinct dry season from December to February, with very warm summers and cold winters. July is the wettest month. The most sunshine falls in May, with an average of 8.3 hours of daily sunshine.
Cheonan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Cheonan - and find the best time to visit.
Monthly Temperature in Cheonan
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
Rainfall in Cheonan
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
Sunshine Hours in Cheonan
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
Humidity in Cheonan by Month
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
Best Time to Visit Cheonan
Conditions in Cheonan are generally most comfortable in April, May and October. They are typically least comfortable in January, February, July and August.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
mixed
Apr
excellent
May
excellent
Jun
very good
Jul
very wet
Aug
very wet
Sep
very good
Oct
excellent
Nov
good
Dec
mixed
- Best overall: April, May and October
- Warmest weather: July and August
- Most sunshine: May
- Wettest months: June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from December to February, with very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Cheonan
What is the best time to visit Cheonan?
April, May and October typically offer the most optimal weather in Cheonan. In contrast, January, February, July and August tend to have less optimal conditions. Cheonan has a distinct dry season from December to February, with very warm summers and cold winters.
What temperatures can I expect in Cheonan?
Daytime highs range from 4°C (39°F) in January to 31°C (88°F) in August. Nighttime lows range from -5°C (23°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Cheonan get?
Annual rainfall is around 1195 mm (47 in). July is the wettest month with 265 mm (10 in), while January is the driest with 25 mm (1 in).
How sunny is Cheonan?
Cheonan receives around 2,416 hours of sunshine per year. May is the sunniest month with 248 hours, while December is the cloudiest with just 159 hours. Overall, Cheonan enjoys abundant sunshine.
Cheonan 3-Day Forecast
Cheonan on the map
Cheonan is highlighted - select any city to see its climate.
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