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Saint Lucie County (Port Saint Lucie)
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United States weather

Weather in Saint Lucie County, Florida for September 2025

Your guide to Saint Lucie County weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Rip Current Statement - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Saint Lucie County is slightly cooler than the historical average by -1.2 °F.

  • The forecast for the next days in Saint Lucie County predicts temperatures to be around 31 °F, close to the historical average.

  • In general, the average temperature in Saint Lucie County at the beginning of September is 30.6 °F. As the month progressed, temperatures tended to remain steady, reaching an average of 30.6 °F by the end of September.

    • Rain 🌧️

  • Saint Lucie County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 309.1 mm.

    • More

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

Average dry days
2
Dry days
Average rainy days
28
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/25°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Saint Lucie County Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain shower
32°
2
Overcast
29°
3
Patchy rain possible
30°
4
Light rain shower
31°
5
Partly cloudy
30°
6
Overcast
31°
7
Thundery outbreaks possible
31°
8
Thundery outbreaks possible
31°
9
Patchy rain possible
31°
10
Patchy rain possible
31°
11
Mist
31°
12
Mist
30°
13
Cloudy
30°
14
Light rain shower
31°
15
Weather Alert Partly cloudy
31°
16
Weather Alert Sunny
33°
17
Cloudy
30°
18
Moderate rain
31°
19
Moderate rain
29°
20
Patchy rain possible
29°
21
Moderate rain
30°
22
Patchy rain possible
31°
23
Patchy rain possible
32°
24
Patchy rain possible
31°
25
Moderate rain
30°
26
Patchy rain possible
27°
27
Patchy rain possible
32°
28
Sunny
31°
29
Moderate or heavy rain shower
31°
30
Moderate or heavy rain shower
32°

Temperatures trend during September in Saint Lucie County

See the weather trend as well as the moving average line

September weather in Saint Lucie County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Light rain shower
Light rain shower
 32° /24° 7.2 mm 7
Sept. 2 Overcast
Overcast
 29° /24° 2.3 mm 6
Sept. 3 Patchy rain possible
Patchy rain possible
 30° /25° 9.2 mm 7
Sept. 4 Light rain shower
Light rain shower
 31° /25° 4.3 mm 7
Sept. 5 Partly cloudy
Partly cloudy
 30° /25° 5.4 mm 7
Sept. 6 Overcast
Overcast
 31° /23° 23.7 mm 7
Sept. 7 Thundery outbreaks possible
Thundery outbreaks possible
 31° /23° 61 mm 7
Sept. 8 Thundery outbreaks possible
Thundery outbreaks possible
 31° /23° 4 mm 7
Sept. 9 Patchy rain possible
Patchy rain possible
 31° /24° 17.6 mm 7
Sept. 10 Patchy rain possible
Patchy rain possible
 31° /24° 9.7 mm 7
Sept. 11 Mist
Mist
 31° /24° 4.4 mm 7
Sept. 12 Mist
Mist
 30° /25° 5.4 mm 7
Sept. 13 Cloudy
Cloudy
 30° /24° 24.3 mm 7
Sept. 14 Light rain shower
Light rain shower
 31° /24° 5.9 mm 7
Sept. 15 Partly cloudy
Partly cloudy
 31° /24° 0 mm 2.3
Sept. 16 Sunny
Sunny
 33° /25° 0 mm 2.2
Sept. 17 Cloudy
Cloudy
 30° /25° 0 mm 1.4
Sept. 18 Moderate rain
Moderate rain
 31° /23° 16.4 mm 0.3
Sept. 19 Moderate rain
Moderate rain
 29° /24° 18.9 mm 0
Sept. 20 Patchy rain possible
Patchy rain possible
 29° /25° 2.9 mm 6
Sept. 21 Moderate rain
Moderate rain
 30° /26° 5.7 mm 6
Sept. 22 Patchy rain possible
Patchy rain possible
 31° /25° 0.4 mm 6
Sept. 23 Patchy rain possible
Patchy rain possible
 32° /26° 0.1 mm 6
Sept. 24 Patchy rain possible
Patchy rain possible
 31° /26° 4.1 mm 6
Sept. 25 Moderate rain
Moderate rain
 30° /25° 6.9 mm 6
Sept. 26 Patchy rain possible
Patchy rain possible
 27° /25° 4.1 mm 6
Sept. 27 Patchy rain possible
Patchy rain possible
 32° /25° 0.2 mm 6
Sept. 28 Sunny
Sunny
 31° /21° 0 mm 7
Sept. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /24° 23.1 mm 7
Sept. 30 Moderate or heavy rain shower
Moderate or heavy rain shower
 32° /25° 6 mm 7
Next
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 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint Lucie County during September?
Significant rainfall exceeding 309.1 mm is expected in Saint Lucie County during September, occurring over more than 28 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 💧

UV exposure in Saint Lucie County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Saint Lucie County
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Port Saint Lucie
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Location coordinates 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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