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Sejong
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Best time to visit Sejong
Data source：Meteostat
Last updated：2025-09
Weather in Sejong throughout the year
- Spring (March–May): 7–18°C on average, mild climate with gradually increasing rainfall. March and April tend to be drier. Common activities: Picnics, outings, flower viewing. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
- Summer (June–August): 22–27°C on average, hot and humid with abundant rainfall, especially in July. Common activities: Indoor activities, visiting summer resorts. Recommended clothing: Light and breathable clothing, sun hat, rain gear.
- Autumn (September–November): 7–23°C on average, comfortable and pleasant with decreasing rainfall and dry weather. Common activities: Maple leaf viewing, hiking. Recommended clothing: Light jacket or cardigan, comfortable trousers.
- Winter (December–February): -1–1°C on average, cold and dry with occasional snowfall. Common activities: Skiing (requires travel to surrounding areas), indoor leisure activities. Recommended clothing: Warm jacket, hat, scarf, gloves.
Weather in Sejong
Annual average temperature: approx. 13°C / Annual rainfall: approx. 1252 mm / Summer humidity: 70%–80% / Rainiest month: July
Sejong weather by month
Month
Temperature (°C)
Rainfall (mm)
January
-1.9°C
21.5
February
0.9°C
24
March
7°C
53.5
April
13.5°C
60.3
May
18°C
87.3
June
22.8°C
131.9
July
25.8°C
331.8
August
26.7°C
230.1
September
22.8°C
161.4
October
14.1°C
67.4
November
7.8°C
51.3
December
-0.2°C
31.8
7-day weather forecast for Sejong
11/2
Monday
Sunny
15.4°C/6.4°C
11/3
Tuesday
Overcast
16.6°C/4.1°C
11/4
Wednesday
Overcast
17.5°C/6.6°C
11/5
Thursday
Overcast
13.2°C/8.8°C
11/6
Friday
Partly Cloudy
12.3°C/2.9°C
11/7
Saturday
Sunny
7.8°C/-1.8°C
11/8
Sunday
Cloudy
9.7°C/-0.5°C
