Cheonan
September
Weather in Cheonan for September 2026
Your guide to Cheonan weather in September - trends and predictions
Until now, September 2026 in Cheonan is cooler than usual, with temperatures averaging 25.1 °C, this is 2.2 °C below the typical seasonal average.
Expect cooler weather in the next days in Cheonan with the forecast suggesting a temperature of 24.1 °C, lower than the historical average.
In general, the average temperature in Cheonan at the beginning of September is 27.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.9 °C by the end of September.
Cheonan experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 253.6 mm.
Temperatures
Rain 🌧️
9
Dry days
21
Rainy days
0
Snow days
27°/18°
Temperatures
12 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 | 27° /21° | 8.9 mm | 4 | |
| 2 Sept. | Light rain shower | 27° /20° | 8 mm | 4 | |
| 3 Sept. |  Cloudy | 30° /19° | 0.9 mm | 4 | |
| 4 Sept. | Light rain shower | 27° /19° | 4.7 mm | 8 | |
| 5 Sept. | Patchy rain possible | 29° /17° | 0.1 mm | 8 | |
| 6 Sept. |  Patchy light rain with thunder | 28° /18° | 2.7 mm | 7 | |
| 7 Sept. |  Moderate or heavy rain shower | 24° /15° | 8.8 mm | 7 | |
| 8 Sept. |  Overcast | 27° /16° | 0 mm | 8 | |
| 9 Sept. | Cloudy | 27° /18° | 0.9 mm | 7 | |
| 10 Sept. | Patchy rain possible | 27° /16° | 0.1 mm | 6 | |
| 11 Sept. | Moderate or heavy rain shower | 29° /17° | 5.5 mm | 6 | |
| 12 Sept. | Moderate or heavy rain shower | 25° /19° | 18.2 mm | 4 | |
| 13 Sept. | Moderate rain at times | 27° /19° | 14 mm | 5 | |
| 14 Sept. | Moderate or heavy rain shower | 29° /21° | 4 mm | 7 | |
| 15 Sept. |  Sunny | 24° /14° | 0 mm | 6.6 | |
| 16 Sept. | Sunny | 26° /13° | 0 mm | 6.2 | |
| 17 Sept. | Overcast | 24° /15° | 0 mm | 6.6 | |
| 18 Sept. | Overcast | 25° /14° | 0 mm | 6 | |
| 19 Sept. | Sunny | 26° /15° | 0 mm | 7 | |
| 20 Sept. | Sunny | 26° /14° | 0 mm | 7 | |
| 21 Sept. | Sunny | 26° /13° | 0 mm | 7 | |
| 22 Sept. | Sunny | 26° /15° | 0 mm | 7 | |
| 23 Sept. | Patchy rain possible | 24° /16° | 0.5 mm | 5 | |
| 24 Sept. | Sunny | 25° /16° | 0 mm | 6 | |
| 25 Sept. | Overcast | 25° /16° | 0 mm | 5 | |
| 26 Sept. | Overcast | 20° /17° | 2.6 mm | 4 | |
| 27 Sept. | Patchy rain possible | 20° /13° | 33.3 mm | 4 | |
| 28 Sept. | Overcast | 21° /11° | 0 mm | 5 | |
| 29 Sept. | Sunny | 25° /15° | 0 mm | 6 | |
| 30 Sept. |  Partly cloudy | 24° /14° | 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 27° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cheonan during September?
Significant rainfall exceeding 253.6 mm is expected in Cheonan during September, occurring over more than 21 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 12 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 💧
Typically, Cheonan has 21 rainy days in September with a total of 253.6 mm of rainfall.
UV exposure in Cheonan during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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