Best Time to Visit Sejong
Best time: May, Oct, Apr, Jun.
Aug is warmest (29.5°C high); Jul is rainiest (291 mm).
Sejong weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 2.2 | -8.2 | 29 | 3.9 |
| Feb | 4.8 | -6 | 33 | 5.1 |
| Mar | 10.8 | -1 | 52 | 6.6 |
| Apr | 18.5 | 5.3 | 85 | 8.3 |
| May | 23.2 | 11.2 | 91 | 9 |
| Jun | 26.7 | 16.7 | 144 | 8.5 |
| Jul | 29 | 21 | 291 | 7.5 |
| Aug | 29.5 | 20.9 | 265 | 7.6 |
| Sep | 25.2 | 14.6 | 145 | 6.7 |
| Oct | 19.6 | 6.9 | 50 | 5.9 |
| Nov | 11.8 | 0.5 | 50 | 4.2 |
| Dec | 5 | -5.4 | 31 | 3.5 |
Average high temperature
Best months by activity
Overall: MayOctAprJun
Beaches: JunAug
Hiking: OctAprMayMar
Sightseeing: OctMayAprJun
Sejong quick facts
What to pack
Cold months (Jan, Feb, Mar, Nov, Dec): warm layers and a coat.
Wet months (May, Jun, Jul, Aug, Sep): raincoat and umbrella.
Frequently asked questions
When is the best time to visit Sejong?
May, Oct, Apr, Jun.
What is the rainiest month?
Jul, about 291 mm.
What is the warmest month?
Aug, with average highs of 29.5°C.
Where to stay
See Sejong hotels · Book Sejong tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.