Chiayi County (Alishan)
September
Weather in Chiayi County for September 2026
Your guide to Chiayi County weather in September - trends and predictions
In general, the average temperature in Chiayi County at the beginning of September is 30.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 30.3 °C by the end of September.
Chiayi County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 217.2 mm.
Temperatures
Rain 🌧️
6
Dry days
24
Rainy days
0
Snow days
30°/22°
Temperatures
10 km/h
Avg max wind
75 %
Avg humidity
Chiayi County Weather September
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Temperatures trend during September in Chiayi County
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September weather in Chiayi County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 31° /21° | 2.9 mm | 7 | |
| 2 Sept. | Light rain shower | 32° /22° | 1.3 mm | 7 | |
| 3 Sept. |  Patchy light drizzle | 32° /21° | 1.7 mm | 7 | |
| 4 Sept. | Light rain shower | 32° /24° | 2.6 mm | 7 | |
| 5 Sept. | Light rain shower | 30° /21° | 3.1 mm | 7 | |
| 6 Sept. |  Moderate or heavy rain shower | 30° /21° | 6.6 mm | 7 | |
| 7 Sept. | Light rain shower | 29° /21° | 16.9 mm | 6 | |
| 8 Sept. | Moderate or heavy rain shower | 30° /20° | 24.9 mm | 7 | |
| 9 Sept. | Moderate or heavy rain shower | 30° /20° | 12.6 mm | 7 | |
| 10 Sept. | Patchy light drizzle | 32° /22° | 4.6 mm | 7 | |
| 11 Sept. | Patchy rain possible | 31° /23° | 4.8 mm | 7 | |
| 12 Sept. | Light rain shower | 30° /23° | 5 mm | 7 | |
| 13 Sept. | Light rain shower | 30° /21° | 6.2 mm | 7 | |
| 14 Sept. | Patchy rain possible | 30° /21° | 10.5 mm | 7 | |
| 15 Sept. | Patchy rain possible | 32° /20° | 3.8 mm | 7 | |
| 16 Sept. | Patchy rain possible | 32° /22° | 0.2 mm | 7 | |
| 17 Sept. | Light rain shower | 32° /23° | 7.2 mm | 7 | |
| 18 Sept. | Patchy rain possible | 32° /22° | 3.1 mm | 7 | |
| 19 Sept. | Light rain shower | 30° /22° | 22.5 mm | 7 | |
| 20 Sept. | Light rain shower | 29° /22° | 17.1 mm | 6 | |
| 21 Sept. | Light rain shower | 31° /21° | 2.2 mm | 7 | |
| 22 Sept. | Moderate or heavy rain shower | 28° /22° | 18.9 mm | 6 | |
| 23 Sept. | Light rain shower | 28° /20° | 56.3 mm | 7 | |
| 24 Sept. | Light rain shower | 28° /20° | 43.2 mm | 7 | |
| 25 Sept. | Patchy light drizzle | 31° /21° | 2.3 mm | 7 | |
| 26 Sept. | Patchy rain possible | 30° /21° | 2.2 mm | 7 | |
| 27 Sept. | Light rain shower | 32° /22° | 4.1 mm | 7 | |
| 28 Sept. | Light rain shower | 30° /22° | 4 mm | 7 | |
| 29 Sept. | Light rain shower | 30° /20° | 3.5 mm | 7 | |
| 30 Sept. | Patchy rain possible | 31° /20° | 2.5 mm | 7 | |
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Important Notice
Our weather forecast for Chiayi County 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 Chiayi County forecast closer to your planned date for the most up-to-date weather information.
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Chiayi County in September - FAQ
What are the expected maximum and minimum temperatures in Chiayi County during September?
During September, expect a variety of temperatures with highs around 30° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Chiayi County during September?
Significant rainfall exceeding 217.2 mm is expected in Chiayi County during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Chiayi County during September?
The average wind speed in Chiayi County during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Chiayi County
Explore the daily rainfall trends and prepare for Chiayi Countys September weather 💧
Typically, Chiayi County has 24 rainy days in September with a total of 217.2 mm of rainfall.
UV exposure in Chiayi County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Chiayi County?Get accurate weather forecasts for Chiayi County, located at latitude 23.515 and longitude 120.81. Stay updated with localized weather information tailored for Chiayi County.
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