Grayson County (Sherman)
September
Weather in Grayson County, Texas for September 2025
Your guide to Grayson County weather in September - trends and predictions
In general, the average temperature in Grayson County at the beginning of September is 28.7 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.7 °F by the end of September.
Grayson County experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 57.3 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
31°/19°
Temperatures
18 km/h
Avg max wind
57 %
Avg humidity
Grayson County Weather September
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Temperatures trend during September in Grayson County
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September weather in Grayson County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Heavy rain at times | 30° /23° | 2.2 mm | 7 | |
| Sept. 2 |  Overcast | 32° /24° | 0 mm | 7 | |
| Sept. 3 | Heavy rain at times | 23° /20° | 5.9 mm | 5 | |
| Sept. 4 |  Moderate or heavy rain shower | 24° /19° | 7.8 mm | 5 | |
| Sept. 5 |  Patchy rain possible | 30° /19° | 0.7 mm | 7 | |
| Sept. 6 |  Partly cloudy | 33° /21° | 0 mm | 8 | |
| Sept. 7 |  Sunny | 29° /20° | 0 mm | 7 | |
| Sept. 8 | Sunny | 28° /16° | 0 mm | 7 | |
| Sept. 9 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 10 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 11 | Patchy rain possible | 31° /20° | 0.2 mm | 7 | |
| Sept. 12 | Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 13 | Sunny | 34° /19° | 0 mm | 8 | |
| Sept. 14 | Patchy rain possible | 36° /19° | 0.1 mm | 8 | |
| Sept. 15 |  Cloudy | 33° /20° | 1.2 mm | 7 | |
| Sept. 16 | Partly cloudy | 32° /19° | 0 mm | 8 | |
| Sept. 17 | Overcast | 33° /19° | 0 mm | 7 | |
| Sept. 18 | Patchy rain possible | 35° /23° | 0.3 mm | 8 | |
| Sept. 19 | Cloudy | 36° /23° | 0 mm | 8 | |
| Sept. 20 | Partly cloudy | 37° /23° | 0 mm | 9 | |
| Sept. 21 | Sunny | 36° /23° | 0 mm | 9 | |
| Sept. 22 | Partly cloudy | 33° /23° | 0.1 mm | 8 | |
| Sept. 23 | Moderate or heavy rain shower | 25° /20° | 24.9 mm | 6 | |
| Sept. 24 | Overcast | 30° /16° | 0 mm | 7 | |
| Sept. 25 | Moderate or heavy rain shower | 28° /18° | 13.9 mm | 6 | |
| Sept. 26 | Sunny | 29° /16° | 0 mm | 7 | |
| Sept. 27 | Sunny | 29° /16° | 0 mm | 7 | |
| Sept. 28 | Sunny | 30° /17° | 0 mm | 8 | |
| Sept. 29 | Cloudy | 30° /18° | 0 mm | 7 | |
| Sept. 30 | Sunny | 32° /17° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Grayson 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 Grayson County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Grayson County in September - FAQ
What are the expected maximum and minimum temperatures in Grayson County during September?
Expect warm days with temperatures around 31°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Grayson County during September?
Moderate rainfall is anticipated in Grayson County during September, with a total of 57.3 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Grayson County during September?
The average wind speed in Grayson County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Grayson County
Explore the daily rainfall trends and prepare for Grayson Countys September weather 💧
UV exposure in Grayson County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Grayson County?Get accurate weather forecasts for Grayson County, located at latitude 33.636 and longitude -96.609. Stay updated with localized weather information tailored for Grayson County.
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