This Week's Nationwide Weather and Useful Information for Foreigners
This Week's Nationwide Weather and Useful Information for Foreigners 1. Nationwide Weather Overview (September 22 - September 28, 2025) This week, Korea's weather is expected to be very pleasant as it fully enters the autumn season. The weather will be generally clear, but be prepared for a large daily temperature difference between morning and evening.
Early Week (Mon-Tues): The entire country will enjoy a clear and bright sky. Daytime temperatures will be in the mid-20s°C, perfect for outdoor activities, but morning and night temperatures can drop to the low 10s°C, feeling quite cool.
Mid to Late Week (Wed-Sun): Under the influence of a high-pressure system, clear weather is expected to continue. There is no significant rain in the forecast until the weekend, so the pleasant and cool autumn weather will persist.
2. Weather by Major City Seoul/Metropolitan Area: Highs of 24-26°C, Lows of 11-14°C. The clear weather will continue, and Monday morning will be particularly cool.
Busan: Highs of 23-25°C, Lows of 15-17°C. It will be generally clear and may feel relatively warmer than Seoul.
Jeju: Highs of 22-24°C, Lows of 17-19°C. The weather will be cloudy before clearing up later in the week. Winds may be a bit strong.
Gangneung (East Coast): Highs of 21-23°C, Lows of 10-13°C. Clear and dry weather is expected. The daily temperature range can be large along the East Coast.
3. Weather Information for Foreign Tourists Fine Dust (미세먼지): Fine dust levels across most of the country are expected to remain at a 'Normal' or 'Good' level this week. It's an excellent time to enjoy comfortable outdoor activities.
Seasonal Characteristics & What to Wear: Late September is one of the best times to travel in Korea.
Weather: Low humidity and clear skies will continue, allowing you to fully enjoy the 'blue sky.'
What to Wear: Long-sleeved shirts or thin sweaters are appropriate during the day. However, it gets cool in the morning and evening, so it's a good idea to bring a light jacket (cardigan, jacket). Layering is useful, especially in mountainous or coastal areas where temperatures can be lower.
Autumn Travel Tips: The cool and clear weather is perfect for outdoor activities.
Autumn Foliage: The foliage hasn't peaked yet, but you can find autumn colors in some areas like national parks.
Walking Tours: I recommend taking a leisurely walk through urban areas like the Seoul City Wall Trail or Bukchon Hanok Village to experience Korea's autumn charm.
