30YearWeather
Jeju Island
When to avoid visiting Jeju Island, South Korea
Seasonal Comparison

Least Favorable Months in Jeju Island

Based on 30 years of NASA satellite data, Jeju Island enjoys relatively good weather year-round. However, if you're comparing months, July, August, January are the least favorable — though still perfectly visitable.

July50/100August50/100January53/100

Good news: Jeju Island has no truly bad months!

With a score of 50/100, even July(the "worst" month) is still a reasonable time to visit. These months are simply the least favorable compared to other months in Jeju Island, not objectively bad. Many travelers enjoy visiting during these periods and benefit from lower prices and fewer crowds.

Why July is the Least Favorable (But Still Okay) Time to Visit Jeju Island

Is July a Good Time to Visit Jeju Island?

👌Good option with minor considerations
Short Answer

July brings storm season risk to Jeju Island. While typical weather is 28°C with 41% rain, plan for potential disruptions and secure cancellation-friendly bookings.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

Oppressive heat and humidity

28.1°C with 87% humidity - challenging conditions

Vaccinations required

Yellow Fever

Feels significantly hotter than 28.1°C

Heat index: 34°C due to 87% humidity

Warm tropical seas

26.6°C sea temperature - Tropical Bath

Peak tourist season

93% of annual peak - expect crowds and peak prices

Good For

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 👴
    Elderly travelers

    87% humidity creates difficult conditions

  • 💼
    Business travelers

    Storm season may cause flight disruptions

  • 🌡️
    Heat-sensitive visitors

    34°C feels-like temperature creates discomfort

930 observations30-year historical data
Confidence: 99%

Key Challenges During These Months

Extreme Heat

Temperatures can become dangerously hot with oppressive humidity

Storm Season

Typhoons or hurricanes can disrupt travel and cause dangerous conditions

Months to Avoid: Detailed Breakdown

Worst50

July

Typhoon season active, Oppressive heat and humidity

View details
2nd Worst50

August

Typhoon season active, Oppressive heat and humidity

View details
3rd Worst53

January

Typhoon season active, Rough sea conditions

View details

Looking for the Best Time Instead?

Discover the optimal months to visit Jeju Island with ideal weather conditions, fewer crowds, and better prices.

Best Time to Visit Jeju Island

Frequently Asked Questions

When should I avoid visiting Jeju Island?

Based on 30 years of data, the most challenging months are July, August, January. Primary concerns include: typhoon season active, oppressive heat and humidity.

What is the worst month to visit Jeju Island?

July is typically the most challenging month, scoring only 50/100 in our travel conditions analysis.

Can I still visit during these months?

Yes, many travelers still visit during challenging months. Come prepared with appropriate gear, flexible bookings, and backup plans. Lower prices and fewer tourists can offset the weather challenges.

Are hotels cheaper during these months?

Often yes. Low season typically means reduced hotel rates, easier reservations, and fewer crowds at popular attractions. Some travelers prefer this trade-off.