Cheonan-si (Cheonan)
September
Weather in Cheonan-si for September 2025
Your guide to Cheonan-si weather in September - trends and predictions
Heavy Rain Warning Updated - See hour by hour.
Until now, September 2025 in Cheonan-si is slightly cooler than the historical average by -0.9 °C.
Expect cooler weather in the next days in Cheonan-si with the forecast suggesting a temperature of 24.4 °C, lower than the historical average.
In general, the average temperature in Cheonan-si at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.3 °C by the end of September.
Cheonan-si in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 288.3 mm.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
10
Dry days
20
Rainy days
0
Snow days
28°/20°
Temperatures
11 km/h
Avg max wind
83 %
Avg humidity
Cheonan-si Weather September
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Temperatures trend during September in Cheonan-si
See the weather trend as well as the moving average line
September weather in Cheonan-si day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 28° /21° | 8.8 mm | 6 | |
| 2 Sept. | Light rain shower | 28° /21° | 3.3 mm | 6 | |
| 3 Sept. |  Cloudy | 31° /19° | 1 mm | 7 | |
| 4 Sept. | Light rain shower | 27° /21° | 9.4 mm | 6 | |
| 5 Sept. | Patchy rain possible | 31° /19° | 0.2 mm | 7 | |
| 6 Sept. |  Patchy light rain with thunder | 29° /22° | 5.4 mm | 6 | |
| 7 Sept. |  Moderate or heavy rain shower | 23° /16° | 17.5 mm | 5 | |
| 8 Sept. |  Overcast | 27° /17° | 0 mm | 6 | |
| 9 Sept. | Patchy rain possible | 29° /19° | 1.4 mm | 7 | |
| 10 Sept. | Patchy rain possible | 30° /18° | 0.1 mm | 7 | |
| 11 Sept. | Moderate or heavy rain shower | 31° /20° | 8.2 mm | 7 | |
| 12 Sept. | Moderate or heavy rain shower | 25° /21° | 27.3 mm | 6 | |
| 13 Sept. | Moderate rain at times | 28° /23° | 5.1 mm | 6 | |
| 14 Sept. | Patchy rain possible | 28° /21° | 0.3 mm | 1.2 | |
| 15 Sept. |  Sunny | 29° /20° | 0 mm | 1.3 | |
| 16 Sept. | Patchy rain possible | 28° /20° | 4.7 mm | 1.5 | |
| 17 Sept. |  Moderate rain | 27° /19° | 14.7 mm | 1.3 | |
| 18 Sept. | Patchy rain possible | 24° /18° | 0.9 mm | 5 | |
| 19 Sept. | Patchy rain possible | 18° /16° | 4.7 mm | 4 | |
| 20 Sept. | Moderate rain | 18° /15° | 8.6 mm | 4 | |
| 21 Sept. | Sunny | 25° /15° | 0 mm | 5 | |
| 22 Sept. | Sunny | 25° /14° | 0 mm | 5 | |
| 23 Sept. |  Partly cloudy | 26° /15° | 0 mm | 5 | |
| 24 Sept. | Patchy rain possible | 22° /18° | 2.4 mm | 5 | |
| 25 Sept. | Patchy rain possible | 26° /18° | 3.6 mm | 5 | |
| 26 Sept. | Sunny | 23° /15° | 0 mm | 5 | |
| 27 Sept. | Sunny | 22° /15° | 0 mm | 5 | |
| 28 Sept. | Overcast | 26° /18° | 0 mm | 6 | |
| 29 Sept. | Sunny | 26° /16° | 0 mm | 7 | |
| 30 Sept. | Partly cloudy | 25° /15° | 0 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Cheonan-si 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 Cheonan-si forecast closer to your planned date for the most up-to-date weather information.
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Cheonan-si in September - FAQ
What are the expected maximum and minimum temperatures in Cheonan-si during September?
During September, expect a variety of temperatures with highs around 28° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cheonan-si during September?
Significant rainfall exceeding 288.3 mm is expected in Cheonan-si during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cheonan-si during September?
The average wind speed in Cheonan-si during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cheonan-si
Explore the daily rainfall trends and prepare for Cheonan-sis September weather 💧
UV exposure in Cheonan-si during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Cheonan-si?Get accurate weather forecasts for Cheonan-si, located at latitude 36.807 and longitude 127.152. Stay updated with localized weather information tailored for Cheonan-si.
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