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.
Yeosu Weather in September
September in Yeosu brings high temperatures, with daytime highs of 26°C (79°F) and nights around 21°C (70°F). Quite a bit of rainfall is expected, around 167 mm (6.6 in), so pack an umbrella.
Rainfall in Yeosu in September
Records from the past 30 years suggest around 9 days of rain, with 167 mm (6.6 in) average for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Yeosu in September
September in Yeosu sees highs of 26°C (79°F) and lows of 21°C (70°F) overnight. The summer season is characteristic of September. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 21°C (70°F), evenings stay pleasantly warm.
Sunshine in Yeosu in September
The area enjoys a balanced 160 hours of sunlight, ensuring it's neither too overcast nor too sunny.Our weather planner can help you find worldwide destinations with pleasant weather during this period. October typically offers the best weather for Yeosu.
Yeosu Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
26°C (79°F)
Chance of Rain
31%
Precipitation
167 mm (6.6 in)
Rainy days
9 days
Humidity
77% *
Sunshine
160 hours *
Percentage Sunshine
43% *
* Data from: Chungmu, South Korea (70 KM, 44 Miles).
Yeosu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Yeosu - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Yeosu typically drop from around 28°C (82°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°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 records for Yeosu in September
Browse day-by-day weather records for Yeosu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Yeosu historical weather extremes in September
The extremes listed below come from historical weather data collected in Yeosu from 1976 through 2026.
- Yeosu recorded its highest September temperature of 35°C (95°F) on September 2, 1994.
- Yeosu experienced its chilliest September day on September 19, 1986, reaching only 17°C (63°F).
- The lowest overnight temperature recorded in September was 7°C (45°F) (September 28, 1997).
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
pleasant
tolerable
unpleasant
poor
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).
What to Wear in Yeosu 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! Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Yeosu in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Yeosu 3-Day Forecast
More climate data for Yeosu
Temperature Rainfall Sunshine Humidity
See the full Yeosu climate overview or explore weather in South Korea.
Popular in September
Where to go in September - average daytime high across popular destinations.
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Mud festival in South Korea
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