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.
Ansan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ansan.
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Climate overview of Ansan
Ansan, Gyeonggi-do, South Korea, sees big temperature differences between seasons, with August peaking at 29°C (84°F) and January dropping to 3°C (37°F).
The city receives considerable rain/snowfall, with around 1231 mm (48 in) annually. July is the wettest month. It has a distinct dry season from December to February, with warm summers and cold winters. The most sunshine falls in May, with an average of 8.1 hours of daily sunshine.
Ansan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ansan - and find the best time to visit.
Monthly Temperature in Ansan
Visitors to Ansan can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 3°C (37°F) in the coolest month, January.
Nights vary from 23°C (73°F) in August to around -4°C (25°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ansan
Ansan is known for its substantial rain/snowfall, with annual precipitation reaching 1231 mm (48 in). The climate in Ansan shows significant variation throughout the year. Expect heavy rainfall in July, the wettest month, with an average of 299 mm (12 in) of precipitation over 16 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 24 mm (0.9 in) of snow/rainfall over 8 snowy/rainy days. For more details, please visit our Ansan 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 Ansan
Ansan offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (8.1 hours daily) and July (5.4 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Incheon, South Korea (18 KM, 11 Miles).
Daily hours of sunshine
Data from: Incheon, South Korea (18 KM, 11 Miles).
Humidity in Ansan by Month
The relative humidity is high throughout the year in Ansan.
The city experiences its highest humidity in July, reaching 82%. In January, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Incheon, South Korea (18 KM, 11 Miles).
Best Time to Visit Ansan
For comfortable weather, consider visiting Ansan in October. Conditions are usually least favourable in January, February, March and July.
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
cold
Apr
good
May
very good
Jun
very good
Jul
very wet
Aug
mixed
Sep
very good
Oct
excellent
Nov
mixed
Dec
mixed
- Best overall: 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 warm summers and cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Ansan
What is the best time to visit Ansan?
October typically offers the most optimal weather in Ansan. In contrast, January, February, March and July tend to have less optimal conditions. Ansan has a distinct dry season from December to February, with warm summers and cold winters.
What temperatures can I expect in Ansan?
Daytime highs range from 3°C (37°F) in January to 29°C (84°F) in August. Nighttime lows range from -4°C (25°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Ansan get?
Annual rainfall is around 1231 mm (48 in). July is the wettest month with 299 mm (12 in), while January is the driest with 24 mm (0.9 in).
How sunny is Ansan?
Ansan receives around 2,397 hours of sunshine per year. May is the sunniest month with 242 hours, while July is the cloudiest with just 161 hours. Overall, Ansan enjoys abundant sunshine.
Ansan 3-Day Forecast
Ansan on the map
Ansan is highlighted - select any city to see its climate.
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