Jeju City
September
Weather in Jeju City for September 2025
Your guide to Jeju City weather in September - trends and predictions
In general, the average temperature in Jeju City at the beginning of September is 28 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25 °C by the end of September.
Expect significant rainfall in Jeju City during September, with an average of 19 rainy days.
Is September a good time to visit Jeju City? check out the best time to travel to Jeju City page.
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11
Dry days
19
Rainy days
0
Snow days
26°/22°
Temperatures
18 km/h
Avg max wind
78 %
Avg humidity
Jeju City in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  28° | 3  29° | 4  28° | 5 28° | 6  29° | 7 28° |
| 8 28° | 9 28° | 10 29° | 11 28° | 12  29° | 13  28° | 14  27° |
| 15 30° | 16 30° | 17 28° | 18 29° | 19 29° | 20 26° | 21 26° |
| 22 24° | 23 24° | 24 24° | 25 26° | 26 27° | 27 25° | 28 24° |
| 29 25° | 30  24° |
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Temperatures trend during September in Jeju City
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. | Torrential rain shower | 26° /22° | 30 mm | 6 | |
| 2 Sept. | Moderate or heavy rain shower | 28° /23° | 6.4 mm | 6 | |
| 3 Sept. | Patchy rain possible | 29° /23° | 1.8 mm | 6 | |
| 4 Sept. | Partly cloudy | 28° /23° | 0.1 mm | 7 | |
| 5 Sept. | Partly cloudy | 28° /23° | 0.3 mm | 7 | |
| 6 Sept. | Sunny | 29° /23° | 0.7 mm | 7 | |
| 7 Sept. | Partly cloudy | 28° /23° | 0.6 mm | 7 | |
| 8 Sept. | Sunny | 28° /22° | 0.4 mm | 7 | |
| 9 Sept. | Patchy rain possible | 28° /23° | 0.2 mm | 6 | |
| 10 Sept. | Light rain shower | 29° /23° | 0.9 mm | 7 | |
| 11 Sept. | Light rain shower | 28° /23° | 14.8 mm | 6 | |
| 12 Sept. | Cloudy | 29° /24° | 0.4 mm | 7 | |
| 13 Sept. | Overcast | 28° /24° | 0.5 mm | 6 | |
| 14 Sept. | Moderate rain | 27° /23° | 1.8 mm | 6 | |
| 15 Sept. | Cloudy | 30° /25° | 1.4 mm | 7 | |
| 16 Sept. | Light rain shower | 30° /25° | 4.4 mm | 7 | |
| 17 Sept. | Light rain shower | 28° /24° | 5.4 mm | 6 | |
| 18 Sept. | Patchy rain possible | 29° /24° | 1.2 mm | 7 | |
| 19 Sept. | Patchy rain possible | 29° /24° | 1.2 mm | 7 | |
| 20 Sept. | Light rain shower | 26° /23° | 31.4 mm | 6 | |
| 21 Sept. | Patchy rain possible | 26° /22° | 7.4 mm | 6 | |
| 22 Sept. | Light rain shower | 24° /22° | 13.2 mm | 6 | |
| 23 Sept. | Cloudy | 24° /20° | 1.3 mm | 5 | |
| 24 Sept. | Patchy rain possible | 24° /21° | 0.8 mm | 5 | |
| 25 Sept. | Light rain shower | 26° /21° | 2.5 mm | 6 | |
| 26 Sept. | Patchy rain possible | 27° /22° | 0.1 mm | 6 | |
| 27 Sept. | Patchy rain possible | 25° /21° | 0.1 mm | 6 | |
| 28 Sept. | Patchy rain possible | 24° /21° | 0.8 mm | 5 | |
| 29 Sept. | Sunny | 25° /21° | 0.4 mm | 7 | |
| 30 Sept. | Patchy light drizzle | 24° /20° | 0.2 mm | 6 | |
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Important Notice
Our weather forecast for Jeju City 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 Jeju City forecast closer to your planned date for the most up-to-date weather information.
Jeju City in September - FAQ
What are the expected maximum and minimum temperatures in Jeju City during September?
During September, expect a variety of temperatures with highs around 26° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Jeju City during September?
Significant rainfall exceeding 124.6 mm is expected in Jeju City during September, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Jeju City during September?
The average wind speed in Jeju City during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Jeju City in September?
As you prepare for your trip to Jeju City 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 Jeju City, 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
- 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
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