Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
Sosan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Sosan.
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Climate overview of Sosan
Sosan, South Korea, sees big temperature differences between seasons, with August peaking at 30°C (86°F) and January dropping to 4°C (39°F).
With around 1150 mm (45 in) of annual rain/snowfall, Sosan has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has a distinct dry season from December to February, with warm summers and cold winters. The wettest month is July. The sunniest month is May, with 8.0 hours of sunshine per day on average.
Sosan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sosan - and find the best time to visit.
Monthly Temperature in Sosan
Visitors to Sosan can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 30°C (86°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 4°C (39°F).
At night, temperatures range from around 23°C (73°F) in August to -3°C (27°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Sosan
Sosan is known for its substantial rain/snowfall, with annual precipitation reaching 1150 mm (45 in). Sosan can be quite wet during July, receiving approximately 247 mm (9.7 in) of precipitation over 15 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 29 mm (1.1 in) of precipitation spread across 10 snowy/rainy days. For more details, please visit our Sosan 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 Sosan
Sosan can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 8.0 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Sosan
The mean water temperature over the year ranges from 5°C (41°F) in March to 25°C (77°F) in August.
Water temperature over the year
Humidity in Sosan by Month
The relative humidity is high throughout the year in Sosan.
The city experiences its highest humidity in July, reaching 85%. In April, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Sosan
The mean wind speed varies between 1 m/s (2 knots) and 2 m/s (4 knots) throughout the year. It is lowest in September and October and highest during January, February, March, April, May, June, July, August, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Sosan
Conditions in Sosan are generally most comfortable in May and October. They are typically least comfortable in January, February, August and December.
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
good
May
excellent
Jun
very good
Jul
mixed
Aug
very wet
Sep
very good
Oct
excellent
Nov
good
Dec
cold
- Best overall: May and October
- Warmest weather: July and August
- Most sunshine: May
- Best for swimming: July, August and September.
- Wettest months: June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from December to February, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Sosan
What is the best time to visit Sosan?
May and October typically offer the most optimal weather in Sosan. In contrast, January, February, August and December tend to have less optimal conditions. Sosan has a distinct dry season from December to February, with warm summers and cold winters.
What temperatures can I expect in Sosan?
Daytime highs range from 4°C (39°F) in January to 30°C (86°F) in August. Nighttime lows range from -3°C (27°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Sosan get?
Annual rainfall is around 1150 mm (45 in). July is the wettest month with 247 mm (9.7 in), while January is the driest with 29 mm (1.1 in).
How sunny is Sosan?
Sosan receives around 2,229 hours of sunshine per year. May is the sunniest month with 241 hours, while December is the cloudiest with just 142 hours. Overall, Sosan enjoys abundant sunshine.
Sosan 3-Day Forecast
Sosan on the map
Sosan is highlighted - select any city to see its climate.
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