Jeju-do (Jeju City)
September
Weather in Jeju-do for September 2026
Your guide to Jeju-do weather in September - trends and predictions
In general, the average temperature in Jeju-do at the beginning of September is 27.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25 °C by the end of September.
Jeju-do experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 300.6 mm.
Temperatures
Rain 🌧️
9
Dry days
21
Rainy days
0
Snow days
26°/22°
Temperatures
22 km/h
Avg max wind
79 %
Avg humidity
Jeju-do Weather September
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What’s the Weather Like in Jeju-do This September?
Discover the average temperatures and weather trends across Jeju-do’s cities this September.
Temperatures trend during September in Jeju-do
See the weather trend as well as the moving average line
September weather in Jeju-do day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 27° /23° | 14 mm | 6 | |
| 2 Sept. |  Moderate or heavy rain shower | 27° /23° | 26.9 mm | 6 | |
| 3 Sept. | Patchy rain possible | 28° /23° | 10.5 mm | 6 | |
| 4 Sept. | Patchy rain possible | 27° /23° | 4.1 mm | 6 | |
| 5 Sept. |  Heavy rain at times | 28° /23° | 23.5 mm | 6 | |
| 6 Sept. | Heavy rain at times | 28° /23° | 8.5 mm | 6 | |
| 7 Sept. | Patchy rain possible | 28° /22° | 1.1 mm | 7 | |
| 8 Sept. |  Cloudy | 28° /22° | 1.5 mm | 7 | |
| 9 Sept. | Patchy rain possible | 26° /22° | 2.3 mm | 6 | |
| 10 Sept. | Light rain shower | 27° /22° | 14.1 mm | 6 | |
| 11 Sept. | Patchy rain possible | 27° /22° | 7.3 mm | 6 | |
| 12 Sept. | Patchy rain possible | 28° /24° | 3.9 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 27° /24° | 24.8 mm | 6 | |
| 14 Sept. | Moderate or heavy rain shower | 27° /23° | 38.8 mm | 6 | |
| 15 Sept. | Moderate rain at times | 29° /24° | 5.8 mm | 6 | |
| 16 Sept. | Moderate rain at times | 29° /24° | 11.4 mm | 6 | |
| 17 Sept. | Light rain shower | 28° /23° | 26.5 mm | 6 | |
| 18 Sept. | Patchy rain possible | 27° /23° | 1.9 mm | 6 | |
| 19 Sept. |  Overcast | 27° /22° | 1.2 mm | 6 | |
| 20 Sept. | Light rain shower | 26° /22° | 13.5 mm | 6 | |
| 21 Sept. | Light rain shower | 25° /21° | 7 mm | 5 | |
| 22 Sept. | Light rain shower | 25° /20° | 5.3 mm | 6 | |
| 23 Sept. | Patchy rain possible | 24° /20° | 0.6 mm | 5 | |
| 24 Sept. |  Sunny | 25° /20° | 1.2 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° | 1 mm | 6 | |
| 28 Sept. | Patchy rain possible | 25° /21° | 3.1 mm | 5 | |
| 29 Sept. | Patchy rain possible | 25° /20° | 0.8 mm | 6 | |
| 30 Sept. | Sunny | 25° /19° | 3 mm | 6 | |
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Important Notice
Our weather forecast for Jeju-do 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-do forecast closer to your planned date for the most up-to-date weather information.
Change Month
Jeju-do in September - FAQ
What are the expected maximum and minimum temperatures in Jeju-do 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-do during September?
Significant rainfall exceeding 300.6 mm is expected in Jeju-do 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-do during September?
The average wind speed in Jeju-do during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Jeju-do
Explore the daily rainfall trends and prepare for Jeju-dos September weather 💧
UV exposure in Jeju-do during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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