Weather in Jeju-si for September 2025
In general, the average temperature in Jeju-si 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-si during September, with an average of 19 rainy days.
Is September a good time to visit Jeju-si? check out the best time to travel to Jeju-si page.
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Jeju-si in September average weather
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-si
September weather day by day
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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Jeju-si in September - FAQ
What to pack to Jeju-si in September?
As you prepare for your trip to Jeju-si 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-si, 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
September rainfall patterns in Jeju-si
UV exposure in Jeju-si during September
Quick links
Get accurate weather forecasts for Jeju-si, located at latitude 33.51 and longitude 126.522. Stay updated with localized weather information tailored for Jeju-si.