UTC Offset
UTC+09:00
Sejong, South Korea Snapshot 2026
Where is Sejong?
Sejong, South Korea
- Continent
- Asia
- Country
- South Korea
- City
- Sejong
- Population
- 394.6K
- Coordinates
- 36.59°, 127.29°
Sejong is a city in South Korea with a population of approximately 394.6K. Average temperatures range from -4°C (24°F) in January to 31°C (87°F) in August. The best time to visit is April, May, June, September, October.
Time in Sejong right now
Open full time & time zone page 05:03 03
Wednesday, July 1, 2026
IANA time zone
Asia/Seoul
Daylight saving
No DST
Next DST change
—
Live weather in Sejong
Daylight in Sejong today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 37m
Climate normals for Sejong
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Fair April best
Excellent May best
Excellent June best
Excellent July
Wet August
Wet September best
Excellent October best
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 3°C / -4°C | -1°C / -9°C | 4days (21 mm) Good | 7.6h Good | 63% Muggy | 2.9 Moderate | Poor | View Details |
| February | 6°C / -3°C | 1°C / -7°C | 4days (33 mm) Good | 8.3h Good | 62% Muggy | 3.5 Moderate | Poor | View Details |
| March | 13°C / 2°C | 10°C / -1°C | 7days (48 mm) Good | 9.1h Good | 65% Muggy | 5 Moderate | Fair | View Details |
| April best | 19°C / 8°C | 17°C / 5°C | 6days (70 mm) Good | 9.6h Good | 63% Muggy | 5.9 High | Excellent | View Details |
| May best | 24°C / 13°C | 23°C / 12°C | 8days (87 mm) Wet | 10.1h Excellent | 65% Muggy | 6.2 High | Excellent | View Details |
| June best | 28°C / 19°C | 30°C / 20°C | 8days (118 mm) Wet | 10h Excellent | 69% Muggy | 6.8 High | Excellent | View Details |
| July | 30°C / 23°C | 34°C / 26°C | 15days (268 mm) Wet | 8.5h Good | 81% Humid | 6.3 High | Wet | View Details |
| August | 31°C / 23°C | 35°C / 27°C | 14days (191 mm) Wet | 9h Good | 79% Humid | 6.4 High | Wet | View Details |
| September best | 26°C / 18°C | 28°C / 20°C | 10days (169 mm) Wet | 8h Good | 77% Humid | 5.2 High | Excellent | View Details |
| October best | 20°C / 11°C | 19°C / 10°C | 7days (82 mm) Good | 8h Good | 73% Muggy | 4 Moderate | Good | View Details |
| November | 13°C / 3°C | 10°C / 0°C | 5days (40 mm) Good | 7.7h Good | 71% Muggy | 3.3 Moderate | Fair | View Details |
| December | 5°C / -3°C | 1°C / -7°C | 4days (29 mm) Good | 7.4h Good | 67% Muggy | 2.5 Moderate | Poor | View Details |
Monthly Temperatures
High Low
Line chart showing monthly temperatures. Jan: 3°C / -4°C . Feb: 6°C / -3°C . Mar: 13°C / 2°C . Apr: 19°C / 8°C . May: 24°C / 13°C . Jun: 28°C / 19°C . Jul: 30°C / 23°C . Aug: 31°C / 23°C . Sep: 26°C / 18°C . Oct: 20°C / 11°C . Nov: 13°C / 3°C . Dec: 5°C / -3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 21 mm. Feb: 33 mm. Mar: 48 mm. Apr: 70 mm. May: 87 mm. Jun: 118 mm. Jul: 268 mm. Aug: 191 mm. Sep: 169 mm. Oct: 82 mm. Nov: 40 mm. Dec: 29 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 63%. Feb: 62%. Mar: 65%. Apr: 63%. May: 65%. Jun: 69%. Jul: 81%. Aug: 79%. Sep: 77%. Oct: 73%. Nov: 71%. Dec: 67%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 17 km/h . May: 16 km/h . Jun: 14 km/h . Jul: 14 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 13 km/h . Nov: 14 km/h . Dec: 14 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 6. Jun: UV 7. Jul: UV 6. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 3.
Frequently Asked Questions
Sejong has a population of approximately 394.6K.
The best months to visit Sejong are April, May, June, September, October, when temperatures are pleasant and rainfall is lower.
Sejong receives approximately 1156mm of rainfall annually across 92 rainy days.
Sejong is located in South Korea, in the Asia region.