Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
August in Gunsan sees daytime temperatures around 30°C (86°F) and lows of 24°C (75°F) at night. With around 229 mm (9 in) of rainfall expected, it's worth packing a rain jacket.
If you prefer dry days with pleasant temperatures, August may not be the ideal month to visit Gunsan. Our weather planner can help you explore destinations with more pleasant weather conditions.
Pick a month to see the average temperature, rainfall and sunshine in Gunsan - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Gunsan typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows typically ranging from 21°C (70°F) to 25°C (77°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Gunsan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Our historical data for Gunsan spans 1976 to 2026, revealing these weather extremes.
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 August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm but pleasant conditions in Gunsan in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Gunsan climate overview or explore weather in South Korea.
Where to go in August - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
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