Busan Weather in September
With daytime temperatures of 26°C (79°F) and nighttime lows of 21°C (70°F), September in Busan brings high temperatures during the day. Do keep in mind that September is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Busan in September
Busan is in the rainy season in September, with rain on around 11 days and an average of 171 mm (6.7 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Busan in September
Busan in September gets highs of 26°C (79°F) during the day and drops to 21°C (70°F) at night. Summer occurs in September. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 21°C (70°F), evenings stay pleasantly warm.
Sunshine in Busan in September
You can expect a moderate amount of sunlight, with approximately 172 hours. Even though this month is part of the wet season, you can still see the sun occasionally.For Busan itself, October generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Busan's climate page.
Busan Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
26°C (79°F)
Chance of Rain
36%
Precipitation
171 mm (6.7 in)
Rainy days
11 days
Humidity
74%
Sunshine
172 hours
Percentage Sunshine
44%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Busan typically drop from around 29°C (84°F) at the start of September to approximately 25°C (77°F) by the end. Nights are pleasant, with lows typically ranging from 16°C (61°F) to 22°C (72°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Busan in September
Browse day-by-day weather records for Busan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Busan historical weather extremes in September
According to our 49 years of weather records for Busan, the following extremes were recorded between 1976 and 2025.
- On September 2, 1994, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- On September 20, 1986, Busan saw its coldest September day with temperatures maxing out at 18°C (64°F).
- The coldest night in September in Busan was on September 27, 1987, with a minimum of 8°C (46°F).
Best Places in South Korea in September
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in September →
perfect weather
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tolerable
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What to Wear in Busan in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Busan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Busan's climate page.
Temperature Rainfall Sunshine Humidity
See the full Busan climate overview or explore weather in South Korea.
