Saint Lucie County (Port Saint Lucie)
September
Weather in Saint Lucie County, Florida for September 2026
Your guide to Saint Lucie County weather in September - trends and predictions
Small Craft Advisory - See hour by hour.
Until now, September 2026 in Saint Lucie County has been nearly identical to the historical average, with a temperature of 30.4 °F (showing only a slight deviation of 0.1 °F).
The forecast for the upcoming days in Saint Lucie County predicts a temperature of 28.9 °F, which is slightly above the historical average.
In general, the average temperature in Saint Lucie County at the beginning of September is 30.9 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.9 °F by the end of September.
Saint Lucie County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 401.3 mm.
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Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
1
Dry days
29
Rainy days
0
Snow days
30°/24°
Temperatures
19 km/h
Avg max wind
78 %
Avg humidity
Saint Lucie County Weather September
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Temperatures trend during September in Saint Lucie County
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September weather in Saint Lucie County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 32° /24° | 235.8 mm | 7 | |
| Sept. 2 |  Overcast | 30° /24° | 26.9 mm | 6 | |
| Sept. 3 | Patchy rain possible | 30° /25° | 8 mm | 6 | |
| Sept. 4 | Light rain shower | 31° /25° | 20.4 mm | 8 | |
| Sept. 5 |  Partly cloudy | 30° /24° | 33.7 mm | 8 | |
| Sept. 6 | Overcast | 32° /23° | 26.4 mm | 8 | |
| Sept. 7 |  Thundery outbreaks possible | 31° /23° | 59.8 mm | 8 | |
| Sept. 8 | Patchy rain possible | 31° /23° | 3.1 mm | 7 | |
| Sept. 9 | Patchy rain possible | 31° /24° | 15.8 mm | 7 | |
| Sept. 10 |  Moderate or heavy rain shower | 31° /24° | 8.4 mm | 6 | |
| Sept. 11 |  Mist | 31° /24° | 16.6 mm | 7 | |
| Sept. 12 | Moderate or heavy rain shower | 30° /25° | 30.5 mm | 6 | |
| Sept. 13 | Moderate or heavy rain shower | 30° /24° | 21.3 mm | 6 | |
| Sept. 14 | Light rain shower | 31° /24° | 4.8 mm | 8 | |
| Sept. 15 | Partly cloudy | 31° /24° | 4.1 mm | 7 | |
| Sept. 16 | Moderate or heavy rain shower | 30° /25° | 10.9 mm | 6 | |
| Sept. 17 | Light rain shower | 31° /24° | 6.1 mm | 6 | |
| Sept. 18 |  Light rain | 31° /24° | 17.2 mm | 6 | |
| Sept. 19 | Light rain shower | 29° /24° | 7.9 mm | 7 | |
| Sept. 20 |  Patchy light rain with thunder | 30° /23° | 11.8 mm | 7 | |
| Sept. 21 | Moderate or heavy rain shower | 30° /23° | 19.5 mm | 6 | |
| Sept. 22 | Patchy rain possible | 30° /23° | 16.6 mm | 6 | |
| Sept. 23 |  Cloudy | 30° /24° | 2.1 mm | 5 | |
| Sept. 24 | Moderate or heavy rain shower | 30° /24° | 4.6 mm | 6 | |
| Sept. 25 | Patchy light rain with thunder | 30° /25° | 7.9 mm | 7 | |
| Sept. 26 |  Sunny | 28° /24° | 0.1 mm | 8.8 | |
| Sept. 27 | Sunny | 28° /23° | 0 mm | 9 | |
| Sept. 28 | Overcast | 28° /24° | 2 mm | 8.3 | |
| Sept. 29 | Overcast | 29° /23° | 0 mm | 8.2 | |
| Sept. 30 | Sunny | 29° /24° | 0.9 mm | 7 | |
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Important Notice
Our weather forecast for Saint Lucie 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 Saint Lucie County forecast closer to your planned date for the most up-to-date weather information.
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Saint Lucie County in September - FAQ
What are the expected maximum and minimum temperatures in Saint Lucie County during September?
During September, expect a variety of temperatures with highs around 30° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint Lucie County during September?
Significant rainfall exceeding 401.3 mm is expected in Saint Lucie County during September, occurring over more than 29 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Saint Lucie County during September?
The average wind speed in Saint Lucie County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint Lucie County
Explore the daily rainfall trends and prepare for Saint Lucie Countys September weather 💧
Typically, Saint Lucie County has 29 rainy days in September with a total of 401.3 mm of rainfall.
UV exposure in Saint Lucie County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Saint Lucie County?Get accurate weather forecasts for Saint Lucie County, located at latitude 27.294 and longitude -80.35. Stay updated with localized weather information tailored for Saint Lucie County.
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