Geoje Weather in September
With daytime temperatures of 26°C (79°F) and nighttime lows of 22°C (72°F), September in Geoje 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 Geoje in September
Geoje is in the rainy season in September, with rain on around 11 days and an average of 179 mm (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 Geoje in September
Daytime highs in Geoje in September reach 26°C (79°F), with nights around 22°C (72°F). This month falls in the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights remain mild at 22°C (72°F), making evenings a pleasant time to be outdoors.
Sunshine in Geoje in September
The area enjoys a moderate level of sunlight, with around 160 hours. It's a good balance between sunny and rainy days.
Wind Speed in Geoje in September
Wind speeds average 2 m/s (4 knots) during September. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.For Geoje 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 Geoje 's climate page.
Geoje Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
26°C (79°F)
Chance of Rain
35%
Precipitation
179 mm (7 in)
Rainy days
11 days
Humidity
77% *
Windspeed
2 m/s (4 knots) *
Sunshine
160 hours *
Percentage Sunshine
43% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Geoje typically drop from around 28°C (82°F) at the start of September to approximately 25°C (77°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 for Geoje in September
Browse day-by-day weather records for Geoje spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Geoje historical weather extremes in September
Our historical data for Geoje spans 1976 to 2025, revealing these weather extremes.
- Geoje recorded its highest September temperature of 35°C (95°F) on September 2, 1994.
- On September 19, 1986, Geoje saw its coldest September day with temperatures maxing out at 17°C (63°F).
- Nighttime temperatures dropped to 8°C (46°F) on September 28, 1987, marking the coldest September night on record.
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
What to Wear in Geoje in September
Warm but pleasant conditions in Geoje in September. 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Geoje 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 Geoje 's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Geoje climate overview or explore weather in South Korea.
