Osan Weather and Climate: A Comprehensive Guide
Osan experiences great temperature shifts.
The city's weather can transition from very warm days
to cold weather.
It is also known for its large amounts of rain/snowfall.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
The climate in Osan is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 31°C in August to a chilly 4°C in the coolest month, January.
Nights are cooler, with lows often dropping to around -6°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Osan has a notably wet climate with abundant precipitation, recording 1187 mm of rain/snowfall per year. The climate in Osan shows significant variation throughout the year. Expect heavy rainfall in July, with an average of 281 mm of precipitation over 16 rainy days. In contrast, January offers drier and sunnier days, with around 24 mm of snow/rainfall over 8 snowy/rainy days. For more details, please visit our Osan Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Osan offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (8.3 hours daily) and December (5.3 hours daily) provides a bit of variety for visitors and residents. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Osan.
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
almost clear and no rain broken clouds and chance of slight snow partly cloudy and chance of snowForecast for Osan
3 m/s
5 m/s
4 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Osan in South Korea
During the months of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Most rainfall (rainy season) is seen in July and August.
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 4°C.
July tops the wettest month list with 281 mm of rainfall.
January is the driest month with 24 mm of precipitation.
May is the sunniest month with an average of 248 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
