Spring (March–May): Average 45–65°F, mild climate. Temperatures gradually warm from March, and rainfall gradually increases. Common activities: Hiking, flower viewing. Recommended clothing: Light jacket, long-sleeved shirt. Note that there is a large temperature difference between morning and evening.
Summer (June–August): Average 74–81°F, hot and humid, abundant rainfall, especially in July. Common activities: Summer resort activities, water activities. Recommended clothing: Light and breathable clothing, sun hat, sunglasses.
Autumn (September–November): Average 47–74°F, comfortable and pleasant climate. Rainfall gradually decreases, and temperatures begin to drop. Common activities: Outing, maple viewing (depending on tree species). Recommended clothing: Comfortable long-sleeved shirts, light jackets.
Winter (December–February): Average -34–34°F, cold and dry, less rainfall. Common activities: Indoor activities, onsen experience. Recommended clothing: Warm coat, hat, scarf, gloves.
Asan climatological average
Annual average temperature: approx. 56.8°F / Annual rainfall: approx. 1705 mm / Summer humidity: 70%–80% / Rainiest month: July
Asan monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
29.5°F
21.3
February
34.5°F
31.5
March
45.7°F
51
April
57.6°F
57.6
May
65.5°F
104.3
June
74.1°F
170.8
July
80.2°F
414.3
August
81.1°F
398.2
September
74.5°F
187.9
October
59.5°F
108.8
November
47.7°F
101.8
December
31.8°F
58.1
Asan weather for the next seven days
2/12
Thursday
Sunny
45.9°F/27°F
2/13
Friday
Sunny
52.5°F/28.9°F
2/14
Saturday
Sunny
56.1°F/34.3°F
2/15
Sunday
Partly Cloudy
46.4°F/31.5°F
2/16
Monday
Partly Cloudy
47.5°F/29.3°F
2/17
Tuesday
Sunny
43.7°F/29.4°F
2/18
Wednesday
Sunny
36.3°F/29°F
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