Incheon
September
Weather in Incheon for September 2025
Your guide to Incheon weather in September - trends and predictions
Heavy Rain Advisory - See hour by hour.
Until now, September 2025 in Incheon is slightly cooler than the historical average by -1.2 °C.
The forecast for the next days in Incheon predicts a temperature of 25.4 °C, which is cooler than the historical average.
In general, the average temperature in Incheon at the beginning of September is 30.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.6 °C by the end of September.
The climate of Incheon in September is notably wet, with an average of 11 rainy days, and a total of 150.3 mm of precipitation.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
19
Dry days
11
Rainy days
0
Snow days
29°/21°
Temperatures
12 km/h
Avg max wind
80 %
Avg humidity
Incheon Weather September
Move between months or click on a day
Temperatures trend during September in Incheon
See the weather trend as well as the moving average line
September weather in Incheon day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 30° /22° | 1.4 mm | 7 | |
| 2 Sept. |  Overcast | 29° /20° | 3.3 mm | 6 | |
| 3 Sept. | Light rain shower | 31° /21° | 2.1 mm | 7 | |
| 4 Sept. |  Partly cloudy | 31° /21° | 1.4 mm | 8 | |
| 5 Sept. |  Sunny | 31° /21° | 0 mm | 8 | |
| 6 Sept. |  Light drizzle | 30° /22° | 1.3 mm | 7 | |
| 7 Sept. | Light rain shower | 29° /22° | 11 mm | 7 | |
| 8 Sept. |  Cloudy | 30° /20° | 0.7 mm | 7 | |
| 9 Sept. | Light rain shower | 29° /20° | 6.6 mm | 7 | |
| 10 Sept. | Patchy rain possible | 31° /20° | 12.6 mm | 7 | |
| 11 Sept. | Patchy light drizzle | 32° /22° | 0.4 mm | 7 | |
| 12 Sept. | Light rain shower | 29° /22° | 3.7 mm | 7 | |
| 13 Sept. | Patchy rain possible | 29° /22° | 6.5 mm | 7 | |
| 14 Sept. | Patchy rain possible | 33° /23° | 0.2 mm | 7 | |
| 15 Sept. | Patchy rain possible | 26° /22° | 4.7 mm | 0.7 | |
| 16 Sept. | Patchy rain possible | 30° /22° | 1.4 mm | 1.9 | |
| 17 Sept. | Patchy rain possible | 27° /21° | 4.6 mm | 0.7 | |
| 18 Sept. | Patchy rain possible | 24° /20° | 1.1 mm | 0.6 | |
| 19 Sept. |  Heavy rain | 20° /19° | 31.4 mm | 0.8 | |
| 20 Sept. | Patchy rain possible | 24° /19° | 4.1 mm | 5 | |
| 21 Sept. | Patchy rain possible | 26° /19° | 0.2 mm | 5 | |
| 22 Sept. | Partly cloudy | 26° /17° | 0 mm | 6 | |
| 23 Sept. | Patchy rain possible | 20° /19° | 2 mm | 4 | |
| 24 Sept. | Patchy rain possible | 26° /19° | 0.4 mm | 5 | |
| 25 Sept. | Partly cloudy | 27° /19° | 0 mm | 6 | |
| 26 Sept. | Partly cloudy | 27° /20° | 0.1 mm | 6 | |
| 27 Sept. | Partly cloudy | 25° /20° | 0 mm | 6 | |
| 28 Sept. | Sunny | 28° /17° | 0 mm | 6 | |
| 29 Sept. | Patchy rain possible | 27° /18° | 0.1 mm | 6 | |
| 30 Sept. | Patchy rain possible | 26° /16° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Incheon in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Incheon forecast closer to your planned date for the most up-to-date weather information.
Change Month
Incheon in September - FAQ
What are the expected maximum and minimum temperatures in Incheon during September?
During September, expect a variety of temperatures with highs around 29° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in Incheon during September?
Significant rainfall exceeding 150.3 mm is expected in Incheon during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Incheon during September?
The average wind speed in Incheon during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Incheon
Explore the daily rainfall trends and prepare for Incheons September weather 💧
UV exposure in Incheon during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Incheon weather pages
You are here
Where is Incheon?Get accurate weather forecasts for Incheon, located at latitude 35.073 and longitude 126.7. Stay updated with localized weather information tailored for Incheon.
Found a mistake?
We appreciate your attention to details. Tell us here.