Cheonan
September
Weather in Cheonan for September 2025
Your guide to Cheonan weather in September - trends and predictions
Heavy Rain Warning Updated - See hour by hour.
Until now, September 2025 in Cheonan is slightly cooler than the historical average by -0.9 °C.
Expect cooler weather in the next days in Cheonan with the forecast suggesting a temperature of 24.4 °C, lower than the historical average.
In general, the average temperature in Cheonan 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 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 Weather September
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Temperatures trend during September in Cheonan
See the weather trend as well as the moving average line
September weather in Cheonan 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 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
Cheonan in September - FAQ
What are the expected maximum and minimum temperatures in Cheonan 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 during September?
Significant rainfall exceeding 288.3 mm is expected in Cheonan 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 during September?
The average wind speed in Cheonan during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cheonan
Explore the daily rainfall trends and prepare for Cheonans September weather 💧
UV exposure in Cheonan during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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