Sejong Weather Year-Round — Best Time to Visit
Sejong, South Korea has mild weather year-round. The best time to visit is May (score: 87/100). Annual average high: 17.7°C, total rainfall: 1112mm.
When is the best time to visit Sejong?
87
May is the best month to visit Sejong with a travel score of 87/100 (Excellent).
Expect highs of 23.9°C, 7 rain days, and 9.9 hours of daily sunshine.
View May weather details →Travel Score by Month
60
Jan
65
Feb
70
Mar
80
Apr
87
May
86
Jun
71
Jul
73
Aug
82
Sep
81
Oct
67
Nov
61
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Sejong each month?
17.7°C
Avg High
8.4°C
Avg Low
1112mm
Annual Rain
How much rain does Sejong get?
Sejong receives 1112mm of rain annually. The wettest month is typically July with 251mm, while December is the driest.
What is the weather like each month in Sejong?
January
60
3°C
Low: -5°C
4 rain days
Mixed
February
65
6°C
Low: -3°C
4 rain days
Good
March
70
12°C
Low: 1°C
6 rain days
Good
April
80
19°C
Low: 7°C
7 rain days
Good
May
Best time to visit87
24°C
Low: 12°C
7 rain days
Excellent
June
86
28°C
Low: 18°C
9 rain days
Excellent
July
71
29°C
Low: 22°C
15 rain days
Good
August
73
30°C
Low: 23°C
15 rain days
Good
September
82
26°C
Low: 17°C
8 rain days
Excellent
October
81
20°C
Low: 10°C
5 rain days
Excellent
November
67
12°C
Low: 3°C
6 rain days
Good
December
61
5°C
Low: -3°C
4 rain days
Good
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Data based on 1994–2024 averages · Last updated: 2024-12-31