When to go · Muju
Muju in September
Avoid month. Listed as a month to avoid: Jul–Aug (monsoon rain, 300 mm in July); late Aug–early Sep only if you want the Firefly Festival crowds.
Key facts
- Verdict
- Avoid
- Temperature
- 25°C (77°F)77°F (25°C) / 16°C (61°F)61°F (16°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- South Korea overall
- Prices
- Medium
- South Korea overall
Verdict
Listed as a month to avoid: Jul–Aug (monsoon rain, 300 mm in July); late Aug–early Sep only if you want the Firefly Festival crowds.
Is another month better than September?
September is rated avoid. These months rate higher:
- OctoberGreatInside Muju's best window: May, Oct (hiking); Dec–Feb (skiing).
- DecemberGreatInside Muju's best window: May, Oct (hiking); Dec–Feb (skiing).
- JanuaryGreatInside Muju's best window: May, Oct (hiking); Dec–Feb (skiing).
- FebruaryGreatInside Muju's best window: May, Oct (hiking); Dec–Feb (skiing).
Weather in September
- MujuHighs around 25 °C (77 °F), lows around 16 °C (61 °F), rain on about 9 daysHighs around 77 °F (25 °C), lows around 61 °F (16 °C), rain on about 9 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.
Chuseok (harvest festival) big impact
Chuseok: 24–26 Sep 2026 (passed); about 14–16 Sep 2027 (check) · South Korea
Same three-day shutdown as Seollal; the largest travel peak of the year.
Crowds and prices
- Crowds · South Korea overall
- Medium
- Prices · South Korea overall
- Medium
South Korea overall: Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
Compare two months
Weather, crowds and prices for any two months in Muju, side by side.
Verdict
Sep: Avoid
Jan: Great (better)
Daytime high
Sep: 25 °C (77 °F)77 °F (25 °C)
Jan: 2 °C (36 °F)36 °F (2 °C)
Night low
Sep: 16 °C (61 °F)61 °F (16 °C)
Jan: -6 °C (21 °F)21 °F (-6 °C)
Rain days
Sep: 9
Jan: 8 (better)
Crowds
Sep: Medium
Jan: Low
Prices
Sep: Medium
Jan: Low
Festivals listed
Sep: 1
Jan: 1
September: Listed as a month to avoid: Jul–Aug (monsoon rain, 300 mm in July); late Aug–early Sep only if you want the Firefly Festival crowds.
January: Inside Muju's best window: May, Oct (hiking); Dec–Feb (skiing).
Muju: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.