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Weather in Indian River County, Florida for September 2026

Your guide to Indian River County weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Small Craft Advisory - See hour by hour.

  • Temperatures

  • 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.

  • Rain 🌧️

  • Indian River County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 520.6 mm.

  • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/25°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Indian River County Weather September

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Temperatures trend during September in Indian River County

See the weather trend as well as the moving average line

September weather in Indian River County day by day

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Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
30° /23° 17.6 mm 9
Sept. 2 Moderate or heavy rain shower
Moderate or heavy rain shower
31° /25° 27.8 mm 4
Sept. 3 Thundery outbreaks possible
Thundery outbreaks possible
30° /25° 2.2 mm 4
Sept. 4 Moderate or heavy rain shower
Moderate or heavy rain shower
32° /25° 4.5 mm 9
Sept. 5 Moderate or heavy rain shower
Moderate or heavy rain shower
30° /23° 20.8 mm 6
Sept. 6 Moderate or heavy rain shower
Moderate or heavy rain shower
32° /23° 33.2 mm 8
Sept. 7 Moderate or heavy rain shower
Moderate or heavy rain shower
30° /23° 96.4 mm 6
Sept. 8 Light rain shower
Light rain shower
29° /23° 39.6 mm 5
Sept. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
30° /24° 17.9 mm 7
Sept. 10 Moderate or heavy rain shower
Moderate or heavy rain shower
32° /24° 15.8 mm 7
Sept. 11 Light rain shower
Light rain shower
29° /24° 19.4 mm 7
Sept. 12 Overcast
Overcast
30° /25° 46.1 mm 5
Sept. 13 Light rain shower
Light rain shower
29° /24° 13.2 mm 4
Sept. 14 Cloudy
Cloudy
31° /24° 3.6 mm 10
Sept. 15 Partly cloudy
Partly cloudy
31° /25° 0.9 mm 8
Sept. 16 Partly cloudy
Partly cloudy
30° /25° 4.5 mm 8
Sept. 17 Thundery outbreaks possible
Thundery outbreaks possible
29° /25° 10.8 mm 4
Sept. 18 Partly cloudy
Partly cloudy
29° /24° 1.7 mm 7
Sept. 19 Light rain shower
Light rain shower
29° /24° 5.3 mm 8
Sept. 20 Partly cloudy
Partly cloudy
30° /24° 4.2 mm 7
Sept. 21 Overcast
Overcast
29° /24° 7.8 mm 5
Sept. 22 Patchy light drizzle
Patchy light drizzle
31° /24° 7.2 mm 5
Sept. 23 Light rain shower
Light rain shower
29° /24° 13.2 mm 3
Sept. 24 Cloudy
Cloudy
30° /24° 1.5 mm 6
Sept. 25 Light rain shower
Light rain shower
29° /26° 8.1 mm 6
Sept. 26 Sunny
Sunny
28° /21° 0.1 mm 8.8
Sept. 27 Sunny
Sunny
28° /20° 0 mm 8.9
Sept. 28 Overcast
Overcast
30° /21° 0.8 mm 8.4
Sept. 29 Overcast
Overcast
30° /22° 0 mm 8.6
Sept. 30 Sunny
Sunny
30° /22° 4.9 mm 8
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Important Notice
Our weather forecast for Indian River 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 Indian River County forecast closer to your planned date for the most up-to-date weather information.

Indian River County in September - FAQ

What are the expected maximum and minimum temperatures in Indian River County during September?

During September, expect a variety of temperatures with highs around 29° and lows near 25°, suitable for diverse activities and preferences.

How much rainfall should be expected in Indian River County during September?

Significant rainfall exceeding 520.6 mm is expected in Indian River County during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Indian River County during September?

The average wind speed in Indian River County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Indian River County

Explore the daily rainfall trends and prepare for Indian River Countys September weather 💧
Typically, Indian River County has 22 rainy days in September with a total of 520.6 mm of rainfall.

UV exposure in Indian River County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Indian River County?

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.

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