Collier County (Naples)
September
Weather in Collier County, Florida for September 2025
Your guide to Collier County weather in September - trends and predictions
Until now, September 2025 in Collier County is slightly cooler than the historical average by -1 °F.
The forecast for the next days in Collier County predicts temperatures to be around 31 °F, close to the historical average.
In general, the average temperature in Collier County at the beginning of September is 30.3 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 30.7 °F by the end of September.
Collier County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 426.2 mm.
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Temperatures
Rain 🌧️
More
7
Dry days
23
Rainy days
0
Snow days
31°/26°
Temperatures
21 km/h
Avg max wind
76 %
Avg humidity
Collier County Weather September
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Temperatures trend during September in Collier County
See the weather trend as well as the moving average line
September weather in Collier County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light drizzle | 30° /26° | 10.1 mm | 7 | |
| Sept. 2 |  Light rain shower | 30° /26° | 22.1 mm | 7 | |
| Sept. 3 | Patchy light rain | 31° /25° | 5.7 mm | 7 | |
| Sept. 4 |  Patchy light rain with thunder | 31° /26° | 21.2 mm | 7 | |
| Sept. 5 | Light rain shower | 30° /26° | 54.8 mm | 7 | |
| Sept. 6 | Light rain shower | 30° /26° | 114.1 mm | 7 | |
| Sept. 7 | Light rain shower | 30° /26° | 20.1 mm | 7 | |
| Sept. 8 | Patchy rain possible | 31° /26° | 2.2 mm | 7 | |
| Sept. 9 | Patchy rain possible | 30° /25° | 17.7 mm | 7 | |
| Sept. 10 | Light rain shower | 31° /26° | 10.8 mm | 7 | |
| Sept. 11 | Patchy rain possible | 31° /25° | 8 mm | 7 | |
| Sept. 12 | Patchy rain possible | 29° /25° | 9.6 mm | 7 | |
| Sept. 13 | Patchy light drizzle | 30° /25° | 25.1 mm | 7 | |
| Sept. 14 |  Sunny | 31° /25° | 0 mm | 8 | |
| Sept. 15 | Patchy rain possible | 33° /24° | 2.5 mm | 2.3 | |
| Sept. 16 | Patchy rain possible | 33° /24° | 4 mm | 1.9 | |
| Sept. 17 |  Moderate rain | 32° /24° | 5.6 mm | 0.5 | |
| Sept. 18 | Patchy rain possible | 33° /23° | 1 mm | 0.3 | |
| Sept. 19 | Moderate rain | 30° /23° | 5 mm | 0 | |
| Sept. 20 | Patchy rain possible | 30° /24° | 0.7 mm | 6 | |
| Sept. 21 |  Partly cloudy | 29° /24° | 0 mm | 7 | |
| Sept. 22 | Patchy rain possible | 30° /27° | 0.1 mm | 6 | |
| Sept. 23 | Patchy rain possible | 30° /27° | 0.2 mm | 6 | |
| Sept. 24 | Patchy rain possible | 31° /27° | 0.9 mm | 6 | |
| Sept. 25 | Patchy rain possible | 31° /26° | 2.4 mm | 6 | |
| Sept. 26 | Patchy rain possible | 29° /27° | 4.4 mm | 6 | |
| Sept. 27 | Patchy rain possible | 30° /27° | 1.9 mm | 6 | |
| Sept. 28 | Sunny | 30° /25° | 0 mm | 7 | |
| Sept. 29 | Partly cloudy | 33° /27° | 0 mm | 8 | |
| Sept. 30 |  Mist | 31° /25° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Collier 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 Collier County forecast closer to your planned date for the most up-to-date weather information.
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Collier County in September - FAQ
What are the expected maximum and minimum temperatures in Collier County during September?
During September, expect a variety of temperatures with highs around 31° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Collier County during September?
Significant rainfall exceeding 426.2 mm is expected in Collier County during September, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Collier County during September?
The average wind speed in Collier County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Collier County
Explore the daily rainfall trends and prepare for Collier Countys September weather 💧
UV exposure in Collier County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Collier County?Get accurate weather forecasts for Collier County, located at latitude 26.142 and longitude -81.796. Stay updated with localized weather information tailored for Collier County.
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