Incheon
September
Weather in Incheon for September 2025
Your guide to Incheon weather in September - trends and predictions
In general, the average temperature in Incheon at the beginning of September is 29.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.1 °C by the end of September.
Incheon sees moderate rainfall in September, averaging 6 rainy days.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
29°/21°
Temperatures
14 km/h
Avg max wind
68 %
Avg humidity
Incheon in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2  28° | 3  29° | 4 30° | 5 30° | 6  31° | 7 30° |
| 8 30° | 9 30° | 10 30° | 11 31° | 12  28° | 13  25° | 14 28° |
| 15 27° | 16 27° | 17 27° | 18 29° | 19 28° | 20 26° | 21 22° |
| 22 24° | 23 26° | 24 26° | 25 25° | 26  23° | 27 25° | 28 26° |
| 29 26° | 30 25° |
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Temperatures trend during September in Incheon
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 29° /22° | 0 mm | 7 | |
| 2 Sept. | Cloudy | 28° /22° | 0.3 mm | 7 | |
| 3 Sept. | Light rain shower | 29° /23° | 3.2 mm | 7 | |
| 4 Sept. | Patchy rain possible | 30° /23° | 0.8 mm | 7 | |
| 5 Sept. | Sunny | 30° /23° | 0.5 mm | 7 | |
| 6 Sept. | Partly cloudy | 31° /24° | 0.3 mm | 7 | |
| 7 Sept. | Sunny | 30° /23° | 0.2 mm | 7 | |
| 8 Sept. | Sunny | 30° /22° | 0 mm | 8 | |
| 9 Sept. | Partly cloudy | 30° /23° | 0.1 mm | 7 | |
| 10 Sept. | Partly cloudy | 30° /24° | 0 mm | 8 | |
| 11 Sept. | Cloudy | 31° /24° | 0 mm | 7 | |
| 12 Sept. | Overcast | 28° /24° | 3.8 mm | 6 | |
| 13 Sept. | Moderate rain at times | 25° /20° | 9.9 mm | 6 | |
| 14 Sept. | Overcast | 28° /21° | 2 mm | 6 | |
| 15 Sept. | Overcast | 27° /22° | 1.8 mm | 6 | |
| 16 Sept. | Light rain shower | 27° /21° | 6.4 mm | 6 | |
| 17 Sept. | Light rain shower | 27° /23° | 8.3 mm | 6 | |
| 18 Sept. | Patchy rain possible | 29° /24° | 1.1 mm | 7 | |
| 19 Sept. | Partly cloudy | 28° /23° | 2.2 mm | 7 | |
| 20 Sept. | Light rain shower | 26° /19° | 7.9 mm | 6 | |
| 21 Sept. | Overcast | 22° /17° | 33.6 mm | 5 | |
| 22 Sept. | Overcast | 24° /18° | 0.1 mm | 6 | |
| 23 Sept. | Sunny | 26° /18° | 0 mm | 7 | |
| 24 Sept. | Cloudy | 26° /18° | 0 mm | 7 | |
| 25 Sept. | Partly cloudy | 25° /19° | 0 mm | 7 | |
| 26 Sept. | Moderate rain | 23° /19° | 13 mm | 5 | |
| 27 Sept. | Patchy rain possible | 25° /19° | 0.8 mm | 6 | |
| 28 Sept. | Partly cloudy | 26° /19° | 0.8 mm | 7 | |
| 29 Sept. | Partly cloudy | 26° /18° | 0 mm | 7 | |
| 30 Sept. | Patchy rain possible | 25° /19° | 0.2 mm | 6 | |
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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.
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 194.2 mm is expected in Incheon during September, occurring over more than 6 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 14 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Incheon in September?
As you prepare for your trip to Incheon in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Incheon, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
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 ☀️
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