Spring (March–May): Average 7.6–18.6°C, 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 23.4–27.3°C, 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 8.7–23.6°C, 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 -1.4–1.4°C, 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. 13.8°C / Annual rainfall: approx. 1705 mm / Summer humidity: 70%–80% / Rainiest month: July
Asan monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-1.4°C
21.3
February
1.4°C
31.5
March
7.6°C
51
April
14.2°C
57.6
May
18.6°C
104.3
June
23.4°C
170.8
July
26.8°C
414.3
August
27.3°C
398.2
September
23.6°C
187.9
October
15.3°C
108.8
November
8.7°C
101.8
December
-0.1°C
58.1
Asan weather for the next seven days
3/31
Tuesday
Moderate rain
18.4°C/9.3°C
4/1
Wednesday
Overcast
14.3°C/7.3°C
4/2
Thursday
Sunny
18.1°C/4.2°C
4/3
Friday
Patchy rain nearby
19.3°C/7.4°C
4/4
Saturday
Moderate rain
16.2°C/7.5°C
4/5
Sunday
Sunny
16.9°C/4.4°C
4/6
Monday
Patchy rain nearby
9.6°C/4.7°C
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