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°C77°F / 16°C61°F
- 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.
Weather in September
- MujuHighs around 25 °C, lows around 16 °C, rain on about 9 daysHighs around 77 °F, lows around 61 °F, 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.
What to pack
Nothing unusual for the weather this month.