Ulsan
September
Weather in Ulsan for September 2025
Your guide to Ulsan weather in September - trends and predictions
In general, the average temperature in Ulsan at the beginning of September is 29.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.4 °C by the end of September.
Ulsan in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 228 mm.
Temperatures
Rain 🌧️
12
Dry days
18
Rainy days
0
Snow days
28°/21°
Temperatures
14 km/h
Avg max wind
82 %
Avg humidity
Ulsan Weather September
Move between months or click on a day
Temperatures trend during September in Ulsan
See the weather trend as well as the moving average line
September weather in Ulsan day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 31° /20° | 0 mm | 8 | |
| 2 Sept. |  Moderate rain at times | 31° /22° | 2.2 mm | 7 | |
| 3 Sept. | Moderate rain at times | 26° /20° | 1.5 mm | 6 | |
| 4 Sept. |  Sunny | 27° /19° | 0 mm | 7 | |
| 5 Sept. | Partly cloudy | 31° /18° | 0 mm | 8 | |
| 6 Sept. | Moderate rain at times | 29° /23° | 3.5 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 29° /22° | 10.6 mm | 6 | |
| 8 Sept. |  Heavy rain at times | 28° /22° | 4 mm | 6 | |
| 9 Sept. |  Patchy rain possible | 28° /23° | 0.3 mm | 6 | |
| 10 Sept. | Partly cloudy | 31° /22° | 0 mm | 8 | |
| 11 Sept. | Moderate or heavy rain shower | 30° /24° | 19.6 mm | 7 | |
| 12 Sept. | Patchy rain possible | 29° /24° | 1.7 mm | 6 | |
| 13 Sept. | Patchy rain possible | 31° /24° | 0.3 mm | 7 | |
| 14 Sept. | Sunny | 31° /24° | 0 mm | 8 | |
| 15 Sept. | Moderate or heavy rain shower | 26° /23° | 16.3 mm | 6 | |
| 16 Sept. | Moderate rain at times | 26° /23° | 4.6 mm | 6 | |
| 17 Sept. | Moderate rain at times | 31° /23° | 2 mm | 7 | |
| 18 Sept. | Moderate rain at times | 30° /24° | 1.5 mm | 7 | |
| 19 Sept. |  Overcast | 31° /24° | 0 mm | 7 | |
| 20 Sept. | Moderate or heavy rain shower | 30° /24° | 13.2 mm | 7 | |
| 21 Sept. | Moderate or heavy rain shower | 24° /19° | 143.3 mm | 5 | |
| 22 Sept. | Patchy rain possible | 22° /19° | 0.9 mm | 5 | |
| 23 Sept. | Overcast | 22° /18° | 0 mm | 5 | |
| 24 Sept. | Overcast | 23° /16° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 25° /18° | 0.2 mm | 6 | |
| 26 Sept. | Sunny | 26° /17° | 0 mm | 7 | |
| 27 Sept. | Patchy rain possible | 25° /19° | 1.2 mm | 6 | |
| 28 Sept. | Patchy rain possible | 24° /19° | 1 mm | 5 | |
| 29 Sept. | Patchy rain possible | 23° /18° | 0.1 mm | 5 | |
| 30 Sept. | Sunny | 25° /17° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Ulsan 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 Ulsan forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ulsan in September - FAQ
What are the expected maximum and minimum temperatures in Ulsan during September?
During September, expect a variety of temperatures with highs around 28° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ulsan during September?
Significant rainfall exceeding 228 mm is expected in Ulsan during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ulsan during September?
The average wind speed in Ulsan during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Ulsan
Explore the daily rainfall trends and prepare for Ulsans September weather 💧
UV exposure in Ulsan during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Ulsan weather pages
You are here
Where is Ulsan?Get accurate weather forecasts for Ulsan, located at latitude 35.537 and longitude 129.317. Stay updated with localized weather information tailored for Ulsan.
Found a mistake?
We appreciate your attention to details. Tell us here.