Saint Johns County (Saint Augustine)
September
Weather in Saint Johns County, Florida for September 2026
Your guide to Saint Johns County weather in September - trends and predictions
Until now, September 2026 in Saint Johns County has been nearly identical to the historical average, with a temperature of 29.1 °F (showing only a slight deviation of 0.5 °F).
The forecast for the next days in Saint Johns County predicts temperatures to be around 28 °F, close to the historical average.
In general, the average temperature in Saint Johns County at the beginning of September is 29.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.9 °F by the end of September.
Saint Johns County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 430.6 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
28°/24°
Temperatures
19 km/h
Avg max wind
79 %
Avg humidity
Saint Johns County Weather September
Move between months or click on a day
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
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 29° /25° | 21.2 mm | 7 | |
| Sept. 2 |  Moderate or heavy rain shower | 28° /24° | 132.9 mm | 5 | |
| Sept. 3 | Patchy rain possible | 29° /25° | 100.5 mm | 5 | |
| Sept. 4 | Moderate or heavy rain shower | 30° /25° | 6.3 mm | 6 | |
| Sept. 5 | Moderate or heavy rain shower | 30° /24° | 8 mm | 6 | |
| Sept. 6 | Moderate or heavy rain shower | 31° /24° | 10.7 mm | 8 | |
| Sept. 7 | Patchy rain possible | 28° /23° | 2.4 mm | 5 | |
| Sept. 8 | Moderate or heavy rain shower | 28° /24° | 67.9 mm | 6 | |
| Sept. 9 | Moderate or heavy rain shower | 28° /24° | 20.4 mm | 6 | |
| Sept. 10 | Patchy rain possible | 28° /24° | 48.3 mm | 7 | |
| Sept. 11 | Moderate or heavy rain shower | 28° /24° | 11.3 mm | 7 | |
| Sept. 12 | Moderate or heavy rain shower | 29° /23° | 7.3 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 28° /24° | 23.6 mm | 6 | |
| Sept. 14 | Moderate or heavy rain shower | 28° /24° | 2.4 mm | 5 | |
| Sept. 15 | Patchy rain possible | 28° /25° | 5.9 mm | 5 | |
| Sept. 16 | Patchy rain possible | 28° /24° | 1.2 mm | 5 | |
| Sept. 17 | Patchy rain possible | 28° /24° | 0.5 mm | 5 | |
| Sept. 18 | Moderate or heavy rain shower | 29° /24° | 10.1 mm | 6 | |
| Sept. 19 | Patchy rain possible | 29° /24° | 6.6 mm | 7 | |
| Sept. 20 | Patchy rain possible | 28° /24° | 1.9 mm | 5 | |
| Sept. 21 | Patchy rain possible | 28° /24° | 0.7 mm | 6 | |
| Sept. 22 | Patchy rain possible | 29° /24° | 1.5 mm | 6 | |
| Sept. 23 |  Partly cloudy | 29° /24° | 2.7 mm | 6 | |
| Sept. 24 | Patchy rain possible | 29° /23° | 5.6 mm | 5 | |
| Sept. 25 | Patchy rain possible | 29° /25° | 0.4 mm | 6 | |
| Sept. 26 |  Sunny | 25° /22° | 0 mm | 8 | |
| Sept. 27 |  Overcast | 27° /20° | 0 mm | 7.7 | |
| Sept. 28 | Sunny | 29° /22° | 0.5 mm | 7.8 | |
| Sept. 29 | Sunny | 28° /23° | 2.4 mm | 7.8 | |
| Sept. 30 | Sunny | 28° /25° | 1.8 mm | 7 | |
| Next | |||||
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.
Change Month
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 28° 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 430.6 mm is expected in Saint Johns County during September, occurring over more than 21 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 19 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 💧
Typically, Saint Johns County has 21 rainy days in September with a total of 430.6 mm of rainfall.
UV exposure in Saint Johns County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Saint Johns County
Select a location for an accurate weather forecast
More Locations Quick links
More Saint Johns County weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.