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 26.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.9 °C by the end of September.
Jeju City experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 300.6 mm.
Is September a good time to visit Jeju City? check out the best time to travel to Jeju City page.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
26°/22°
Temperatures
22 km/h
Avg max wind
79 %
Avg humidity
Jeju City in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  27° | 3 27° | 4 27° | 5  27° | 6 27° | 7 27° |
| 8  27° | 9 26° | 10 27° | 11 27° | 12 27° | 13 27° | 14 27° |
| 15 29° | 16 29° | 17 27° | 18 27° | 19  27° | 20 26° | 21 25° |
| 22 25° | 23 24° | 24  24° | 25 25° | 26 25° | 27 25° | 28 24° |
| 29 26° | 30 25° |
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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. | Patchy rain possible | 26° /22° | 16.9 mm | 6 | |
| 2 Sept. | Moderate or heavy rain shower | 27° /22° | 33 mm | 6 | |
| 3 Sept. | Patchy rain possible | 27° /22° | 12.9 mm | 6 | |
| 4 Sept. | Patchy rain possible | 27° /23° | 5.1 mm | 6 | |
| 5 Sept. | Heavy rain at times | 27° /23° | 29.1 mm | 6 | |
| 6 Sept. | Heavy rain at times | 27° /22° | 10.6 mm | 6 | |
| 7 Sept. | Patchy rain possible | 27° /21° | 0.7 mm | 7 | |
| 8 Sept. | Cloudy | 27° /22° | 0.2 mm | 7 | |
| 9 Sept. | Patchy rain possible | 26° /21° | 0.1 mm | 6 | |
| 10 Sept. | Patchy rain possible | 27° /22° | 13.7 mm | 6 | |
| 11 Sept. | Patchy rain possible | 27° /23° | 8.8 mm | 6 | |
| 12 Sept. | Patchy rain possible | 27° /23° | 4.3 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 27° /23° | 28.3 mm | 6 | |
| 14 Sept. | Moderate or heavy rain shower | 27° /23° | 43.7 mm | 6 | |
| 15 Sept. | Moderate rain at times | 29° /24° | 6.3 mm | 7 | |
| 16 Sept. | Moderate or heavy rain shower | 29° /24° | 13.2 mm | 6 | |
| 17 Sept. | Light rain shower | 27° /23° | 32.3 mm | 6 | |
| 18 Sept. | Patchy rain possible | 27° /23° | 1.2 mm | 6 | |
| 19 Sept. | Overcast | 27° /22° | 1.3 mm | 6 | |
| 20 Sept. | Cloudy | 26° /22° | 15.8 mm | 6 | |
| 21 Sept. | Moderate or heavy rain shower | 25° /21° | 8.6 mm | 6 | |
| 22 Sept. | Light rain shower | 25° /21° | 6.6 mm | 6 | |
| 23 Sept. | Overcast | 24° /19° | 0.6 mm | 5 | |
| 24 Sept. | Sunny | 24° /20° | 0.4 mm | 6 | |
| 25 Sept. | Light rain shower | 25° /21° | 1.3 mm | 6 | |
| 26 Sept. | Patchy rain possible | 25° /21° | 0.1 mm | 6 | |
| 27 Sept. | Patchy rain possible | 25° /20° | 0.2 mm | 6 | |
| 28 Sept. | Patchy rain possible | 24° /21° | 0.5 mm | 5 | |
| 29 Sept. | Patchy rain possible | 26° /20° | 0.9 mm | 7 | |
| 30 Sept. | Moderate or heavy rain shower | 25° /19° | 3.7 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 300.6 mm is expected in Jeju City during September, occurring over more than 21 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 22 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
September rainfall patterns in Jeju City
Explore the daily rainfall trends and prepare for Jeju Citys September weather 💧
UV exposure in Jeju City during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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