Weather in Indian River County, Florida for September 2026
Small Craft Advisory - See hour by hour.
Until now, September 2026 in Indian River County has been nearly identical to the historical average, with a temperature of 30.5 °F (showing only a slight deviation of 0.4 °F).
The forecast for the next days in Indian River County predicts temperatures to be around 30 °F, close to the historical average.
In general, the average temperature in Indian River County at the beginning of September is 30.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.3 °F by the end of September.
Indian River County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 520.6 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
Indian River County Weather September
Temperatures trend during September in Indian River County
September weather in Indian River County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Mist | 30° /23° | 17.6 mm | 9 | |
| Sept. 2 | Moderate or heavy rain shower | 31° /25° | 27.8 mm | 4 | |
| Sept. 3 | Thundery outbreaks possible | 30° /25° | 2.2 mm | 4 | |
| Sept. 4 | Moderate or heavy rain shower | 32° /25° | 4.5 mm | 9 | |
| Sept. 5 | Moderate or heavy rain shower | 30° /23° | 20.8 mm | 6 | |
| Sept. 6 | Moderate or heavy rain shower | 32° /23° | 33.2 mm | 8 | |
| Sept. 7 | Moderate or heavy rain shower | 30° /23° | 96.4 mm | 6 | |
| Sept. 8 | Light rain shower | 29° /23° | 39.6 mm | 5 | |
| Sept. 9 | Moderate or heavy rain shower | 30° /24° | 17.9 mm | 7 | |
| Sept. 10 | Moderate or heavy rain shower | 32° /24° | 15.8 mm | 7 | |
| Sept. 11 | Light rain shower | 29° /24° | 19.4 mm | 7 | |
| Sept. 12 | Overcast | 30° /25° | 46.1 mm | 5 | |
| Sept. 13 | Light rain shower | 29° /24° | 13.2 mm | 4 | |
| Sept. 14 | Cloudy | 31° /24° | 3.6 mm | 10 | |
| Sept. 15 | Partly cloudy | 31° /25° | 0.9 mm | 8 | |
| Sept. 16 | Partly cloudy | 30° /25° | 4.5 mm | 8 | |
| Sept. 17 | Thundery outbreaks possible | 29° /25° | 10.8 mm | 4 | |
| Sept. 18 | Partly cloudy | 29° /24° | 1.7 mm | 7 | |
| Sept. 19 | Light rain shower | 29° /24° | 5.3 mm | 8 | |
| Sept. 20 | Partly cloudy | 30° /24° | 4.2 mm | 7 | |
| Sept. 21 | Overcast | 29° /24° | 7.8 mm | 5 | |
| Sept. 22 | Patchy light drizzle | 31° /24° | 7.2 mm | 5 | |
| Sept. 23 | Light rain shower | 29° /24° | 13.2 mm | 3 | |
| Sept. 24 | Cloudy | 30° /24° | 1.5 mm | 6 | |
| Sept. 25 | Light rain shower | 29° /26° | 8.1 mm | 6 | |
| Sept. 26 | Sunny | 28° /21° | 0.1 mm | 8.8 | |
| Sept. 27 | Sunny | 28° /20° | 0 mm | 8.9 | |
| Sept. 28 | Overcast | 30° /21° | 0.8 mm | 8.4 | |
| Sept. 29 | Overcast | 30° /22° | 0 mm | 8.6 | |
| Sept. 30 | Sunny | 30° /22° | 4.9 mm | 8 | |
| Next | |||||
Indian River County in September - FAQ
What are the expected maximum and minimum temperatures in Indian River County during September?
How much rainfall should be expected in Indian River County during September?
What are the typical wind conditions in Indian River County during September?
September rainfall patterns in Indian River County
UV exposure in Indian River County during September
Quick links
Get accurate weather forecasts for Indian River County, located at latitude 27.639 and longitude -80.397. Stay updated with localized weather information tailored for Indian River County.