Saint Johns County (Saint Augustine)
September
Weather in Saint Johns County, Florida for September 2025
Your guide to Saint Johns County weather in September - trends and predictions
Coastal Flood Advisory - See hour by hour.
Until now, September 2025 in Saint Johns County is slightly cooler than the historical average by -0.6 °F.
The forecast for the upcoming days in Saint Johns County predicts a temperature of 29.4 °F, which is slightly above the historical average.
In general, the average temperature in Saint Johns County at the beginning of September is 28.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 30.1 °F by the end of September.
Saint Johns County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 291.3 mm.
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Temperatures
Rain 🌧️
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7
Dry days
23
Rainy days
0
Snow days
29°/24°
Temperatures
18 km/h
Avg max wind
79 %
Avg humidity
Saint Johns County Weather September
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Temperatures trend during September in Saint Johns County
See the weather trend as well as the moving average line
September weather in Saint Johns County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 28° /25° | 31.7 mm | 6 | |
| Sept. 2 |  Moderate or heavy rain shower | 29° /25° | 29 mm | 7 | |
| Sept. 3 | Patchy rain possible | 29° /25° | 12.4 mm | 6 | |
| Sept. 4 | Moderate or heavy rain shower | 30° /25° | 4.7 mm | 7 | |
| Sept. 5 | Moderate or heavy rain shower | 29° /25° | 11.5 mm | 7 | |
| Sept. 6 | Moderate or heavy rain shower | 29° /24° | 9 mm | 7 | |
| Sept. 7 | Patchy rain possible | 28° /24° | 0.8 mm | 6 | |
| Sept. 8 | Moderate or heavy rain shower | 27° /23° | 31.7 mm | 6 | |
| Sept. 9 | Moderate or heavy rain shower | 27° /24° | 29.8 mm | 6 | |
| Sept. 10 | Patchy rain possible | 26° /24° | 70.6 mm | 6 | |
| Sept. 11 | Moderate or heavy rain shower | 27° /24° | 16.2 mm | 7 | |
| Sept. 12 | Moderate or heavy rain shower | 28° /24° | 9.6 mm | 6 | |
| Sept. 13 |  Heavy rain at times | 28° /24° | 33.8 mm | 6 | |
| Sept. 14 | Moderate or heavy rain shower | 28° /24° | 3 mm | 6 | |
| Sept. 15 | Patchy rain possible | 28° /25° | 6.1 mm | 6 | |
| Sept. 16 |  Partly cloudy | 27° /23° | 0 mm | 2 | |
| Sept. 17 |  Sunny | 31° /24° | 0 mm | 1.9 | |
| Sept. 18 | Partly cloudy | 29° /24° | 0 mm | 1.7 | |
| Sept. 19 | Sunny | 30° /23° | 0 mm | 2 | |
| Sept. 20 |  Moderate rain | 28° /25° | 11.8 mm | 0 | |
| Sept. 21 | Moderate rain | 27° /25° | 16.1 mm | 6 | |
| Sept. 22 | Patchy rain possible | 28° /25° | 1.3 mm | 6 | |
| Sept. 23 | Patchy rain possible | 30° /25° | 0.1 mm | 6 | |
| Sept. 24 | Sunny | 31° /24° | 0 mm | 7 | |
| Sept. 25 | Sunny | 30° /24° | 0 mm | 7 | |
| Sept. 26 | Patchy rain possible | 31° /24° | 0.1 mm | 6 | |
| Sept. 27 | Sunny | 33° /24° | 0 mm | 7 | |
| Sept. 28 | Patchy rain possible | 25° /24° | 1.9 mm | 5 | |
| Sept. 29 | Patchy rain possible | 32° /24° | 0.3 mm | 6 | |
| Sept. 30 | Light rain shower | 29° /26° | 28 mm | 6 | |
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Important Notice
Our weather forecast for Saint Johns 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 Johns County forecast closer to your planned date for the most up-to-date weather information.
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Saint Johns County in September - FAQ
What are the expected maximum and minimum temperatures in Saint Johns County during September?
During September, expect a variety of temperatures with highs around 29° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint Johns County during September?
Significant rainfall exceeding 291.3 mm is expected in Saint Johns 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 Saint Johns County during September?
The average wind speed in Saint Johns County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint Johns County
Explore the daily rainfall trends and prepare for Saint Johns Countys September weather 💧
UV exposure in Saint Johns County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Saint Johns County?Get accurate weather forecasts for Saint Johns County, located at latitude 29.895 and longitude -81.315. Stay updated with localized weather information tailored for Saint Johns County.
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