South Korea
Best Time to Visit Ansan-si
Ansan-si, a city in Gyeonggi Province, South Korea, experiences a humid continental climate with four distinct seasons. Visitors can expect mild springs and autumns, hot and humid summers, and cold winters. The best time to visit Ansan-si largely depends on personal preference and the desired level of comfort.
✦ Visit Ansan-si in September or October for a comfortable and manageable travel experience.
✅ Best months
September and October are the ideal months to visit Ansan-si, with comfortable temperatures ranging from 15°C to 25°C (59°F to 77°F), and manageable crowds.
🔥 Peak season
August is the peak month, driven by the Ansan International K-Pop Festival, which attracts a large crowd. Hotel prices surge during this period, with prices often 20-30% higher than the average rate.
💷 Shoulder (best value)
April and May are good shoulder months, with mild weather and lower prices. Visitors can expect discounts of up to 30% on accommodations and a more relaxed atmosphere.
🌙 Quietest & cheapest
The quietest and cheapest period is from mid-November to mid-February, but this is also the coldest time of the year, with temperatures often below 0°C (32°F).
Ansan-si season by season
Spring (Mar–May)
Weather: Temperatures range from 10°C to 20°C (50°F to 68°F). Expect occasional rain showers.
Crowds: Low
Ideal for hiking and outdoor activities.
Summer (Jun–Aug)
Weather: Hot and humid, with temperatures often reaching 30°C (86°F).
Crowds: High
Best for beachgoers and festival enthusiasts.
Autumn (Sep–Nov)
Weather: Comfortable temperatures, ranging from 10°C to 25°C (50°F to 77°F).
Crowds: Medium
Perfect for outdoor activities and scenic views.
Winter (Dec–Feb)
Weather: Cold, with temperatures often below 0°C (32°F).
Crowds: Low
Ideal for skiing and indoor activities.
🎭 Events worth timing a trip around
The Ansan International K-Pop Festival (August) and the Ansan Cherry Blossom Festival (April) are two signature annual events worth timing a trip around.
🧳 What to pack
Be prepared for sudden rain showers, and pack layers for the temperature fluctuations throughout the year.
Found your dates? Get your hotel briefing.
Room tips, the 14-day forecast for your exact stay, dining, transport and more — free for any Ansan-si hotel.
Researched & reviewed by the TripSage editorial team · Updated July 2026.