When to go · Seosan
Seosan in January
Avoid month. Listed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).
Key facts
- Verdict
- Avoid
- Temperature
- 3°C (38°F)38°F (3°C) / −6°C (21°F)21°F (−6°C)
- average high / low
- Rain days
- 8
- Crowds
- Low
- South Korea overall
- Prices
- Low
- South Korea overall
Verdict
Listed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).
Is another month better than January?
January is rated avoid. These months rate higher:
Weather in January
- SeosanHighs around 3.3 °C (38 °F), lows around -6.2 °C (21 °F), rain on about 8 daysHighs around 38 °F (3.3 °C), lows around 21 °F (-6.2 °C), rain on about 8 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Seollal (Lunar New Year) big impact
About 5–8 Feb 2027 (lunar; incl. substitute day — check) · South Korea
Three-plus days off: many restaurants and shops close, trains and buses sold out, palaces open (often free), Seoul quiet.
Crowds and prices
- Crowds · South Korea overall
- Low
- Prices · South Korea overall
- Low
South Korea overall: Cold and dry, low prices; ski in Gangwon; Seollal can fall late in the month — check.
Compare two months
Weather, crowds and prices for any two months in Seosan, side by side.
Verdict
Jan: Avoid
Apr: Great (better)
Daytime high
Jan: 3.3 °C (38 °F)38 °F (3.3 °C)
Apr: 17.3 °C (63 °F)63 °F (17.3 °C)
Night low
Jan: -6.2 °C (21 °F)21 °F (-6.2 °C)
Apr: 5 °C (41 °F)41 °F (5 °C)
Rain days
Jan: 8
Apr: 8
Crowds
Jan: Low
Apr: High
Prices
Jan: Low
Apr: High
Festivals listed
Jan: 1
Apr: 0
January: Listed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).
April: Inside Seosan's best window: Apr–May, Sep–Oct.
Seosan: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm coat, hat and gloves for mornings and evenings