Yongin Weather in September
In Yongin, September brings high daytime temperatures around 27°C (81°F), with nights cooling to 17°C (63°F). Expect quite a bit of rainfall this month.
Rainfall in Yongin in September
On average, there are about 9 days with rain during this month, averaging 136 mm (5.4 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Yongin in September
In September, Yongin gets high temperatures, with highs of 27°C (81°F). Nights cool to around 17°C (63°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Yongin in September
The month experiences a moderate amount of sunlight, with 182 hours of sunshine. This provides a nice balance between sunshine and clouds.If you prefer dry days with pleasant temperatures, May and October typically offer 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 Yongin's climate page.
Yongin Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
27°C (81°F)
Chance of Rain
28%
Precipitation
136 mm (5.4 in)
Rainy days
9 days
Humidity
67% *
Sunshine
182 hours *
Percentage Sunshine
48% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Yongin 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 13°C (55°F) to 20°C (68°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 Yongin in September
Browse day-by-day weather records for Yongin spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Yongin historical weather extremes in September
The extremes listed below come from historical weather data collected in Yongin from 1976 through 2025.
- Yongin recorded its highest September temperature of 34°C (93°F) on September 17, 2024.
- Yongin experienced its chilliest September day on September 26, 1987, reaching only 16°C (61°F).
- Yongin registered its coldest September night on September 27, 1987, with temperatures dropping to 3°C (37°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
pleasant
tolerable
unpleasant
poor
What to Wear in Yongin 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. Prepare for significant rainfall with proper waterproof clothing and shoes. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Yongin 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 Yongin's climate page.
Temperature Rainfall Sunshine Humidity
See the full Yongin climate overview or explore weather in South Korea.
