Harrison County (Biloxi)
September
Weather in Harrison County, Mississippi for September 2025
Your guide to Harrison County weather in September - trends and predictions
So far, September 2025 in Harrison County is slightly warmer than the historical average by 1.5 °F.
The forecast for the upcoming days in Harrison County predicts a temperature of 32 °F, which is slightly above the historical average.
In general, the average temperature in Harrison County at the beginning of September is 29.3 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 31.4 °F by the end of September.
Harrison County in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 299 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
13
Dry days
17
Rainy days
0
Snow days
28°/23°
Temperatures
17 km/h
Avg max wind
82 %
Avg humidity
Harrison County Weather September
Move between months or click on a day
Temperatures trend during September in Harrison County
See the weather trend as well as the moving average line
September weather in Harrison County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 29° /24° | 0.8 mm | 7 | |
| Sept. 2 |  Partly cloudy | 31° /24° | 0 mm | 8 | |
| Sept. 3 |  Overcast | 31° /24° | 0 mm | 8 | |
| Sept. 4 |  Moderate or heavy rain shower | 30° /25° | 13.6 mm | 7 | |
| Sept. 5 | Moderate or heavy rain shower | 27° /25° | 20.6 mm | 7 | |
| Sept. 6 | Moderate or heavy rain shower | 29° /24° | 23.8 mm | 7 | |
| Sept. 7 | Moderate or heavy rain shower | 28° /22° | 11.1 mm | 6 | |
| Sept. 8 | Overcast | 30° /20° | 0 mm | 7 | |
| Sept. 9 | Moderate or heavy rain shower | 28° /22° | 8.8 mm | 6 | |
| Sept. 10 | Moderate or heavy rain shower | 27° /23° | 14.8 mm | 7 | |
| Sept. 11 | Moderate or heavy rain shower | 29° /23° | 28.5 mm | 7 | |
| Sept. 12 | Overcast | 29° /23° | 10 mm | 7 | |
| Sept. 13 |  Heavy rain at times | 29° /21° | 2 mm | 7 | |
| Sept. 14 | Patchy rain possible | 30° /22° | 0.6 mm | 7 | |
| Sept. 15 |  Sunny | 34° /22° | 0 mm | 1.5 | |
| Sept. 16 | Partly cloudy | 32° /25° | 0 mm | 1.9 | |
| Sept. 17 | Sunny | 32° /24° | 0 mm | 1.8 | |
| Sept. 18 | Partly cloudy | 32° /25° | 0 mm | 2 | |
| Sept. 19 | Patchy rain possible | 31° /22° | 1.2 mm | 0 | |
| Sept. 20 | Sunny | 33° /22° | 0 mm | 7 | |
| Sept. 21 | Sunny | 32° /23° | 0 mm | 7 | |
| Sept. 22 | Partly cloudy | 31° /22° | 0.1 mm | 7 | |
| Sept. 23 | Patchy rain possible | 30° /23° | 0.3 mm | 6 | |
| Sept. 24 | Sunny | 32° /23° | 0 mm | 7 | |
| Sept. 25 | Patchy rain possible | 31° /23° | 0.1 mm | 6 | |
| Sept. 26 | Sunny | 32° /19° | 0 mm | 7 | |
| Sept. 27 | Sunny | 33° /21° | 0 mm | 7 | |
| Sept. 28 | Sunny | 33° /23° | 0 mm | 7 | |
| Sept. 29 | Sunny | 30° /22° | 0 mm | 8 | |
| Sept. 30 |  Cloudy | 29° /24° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Harrison 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 Harrison County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Harrison County in September - FAQ
What are the expected maximum and minimum temperatures in Harrison County during September?
During September, expect a variety of temperatures with highs around 28° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Harrison County during September?
Significant rainfall exceeding 299 mm is expected in Harrison County during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Harrison County during September?
The average wind speed in Harrison County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Harrison County
Explore the daily rainfall trends and prepare for Harrison Countys September weather 💧
UV exposure in Harrison County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Harrison County
Select a location for an accurate weather forecast
More Locations Quick links
More Harrison County weather pages
You are here
Where is Harrison County?Get accurate weather forecasts for Harrison County, located at latitude 30.396 and longitude -88.885. Stay updated with localized weather information tailored for Harrison County.
Found a mistake?
We appreciate your attention to details. Tell us here.