Weather in Harris County, Texas for September 2026
Until now, September 2026 in Harris County has been nearly identical to the historical average, with a temperature of 32.8 °F (showing only a slight deviation of 0.5 °F).
The forecast for the upcoming days in Harris County predicts a temperature of 34.8 °F, which is slightly above the historical average.
In general, the average temperature in Harris County at the beginning of September is 32.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 33.9 °F by the end of September.
Harris County experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 73.8 mm.
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Harris County Weather September
Temperatures trend during September in Harris County
September weather in Harris County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate or heavy rain shower | 32° /25° | 9.4 mm | 6 | |
| Sept. 2 | Moderate or heavy rain shower | 34° /25° | 22.7 mm | 6 | |
| Sept. 3 |  Patchy rain possible | 33° /24° | 30 mm | 6 | |
| Sept. 4 | Light rain shower | 32° /24° | 2.8 mm | 7 | |
| Sept. 5 | Patchy rain possible | 32° /24° | 32.9 mm | 7 | |
| Sept. 6 | Patchy rain possible | 33° /25° | 26.1 mm | 7 | |
| Sept. 7 |  Partly cloudy | 34° /24° | 0.5 mm | 8 | |
| Sept. 8 |  Sunny | 35° /23° | 47.9 mm | 8 | |
| Sept. 9 | Sunny | 34° /23° | 1.2 mm | 8 | |
| Sept. 10 | Sunny | 34° /23° | 12.5 mm | 8 | |
| Sept. 11 | Partly cloudy | 33° /23° | 4.1 mm | 7 | |
| Sept. 12 |  Overcast | 33° /24° | 0.2 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 34° /24° | 5.7 mm | 8 | |
| Sept. 14 | Moderate or heavy rain shower | 32° /24° | 8.7 mm | 8 | |
| Sept. 15 | Sunny | 36° /27° | 0 mm | 9.4 | |
| Sept. 16 | Overcast | 34° /27° | 0.9 mm | 8.7 | |
| Sept. 17 | Sunny | 34° /27° | 1 mm | 8 | |
| Sept. 18 | Sunny | 34° /26° | 0 mm | 8 | |
| Sept. 19 | Sunny | 35° /26° | 0 mm | 8 | |
| Sept. 20 | Sunny | 35° /26° | 0 mm | 9 | |
| Sept. 21 | Sunny | 36° /26° | 0 mm | 9 | |
| Sept. 22 | Sunny | 36° /27° | 0 mm | 9 | |
| Sept. 23 | Patchy rain possible | 36° /28° | 2.9 mm | 8 | |
| Sept. 24 | Sunny | 35° /25° | 0.3 mm | 8 | |
| Sept. 25 | Sunny | 33° /23° | 0 mm | 8 | |
| Sept. 26 | Sunny | 34° /22° | 0 mm | 8 | |
| Sept. 27 | Sunny | 35° /24° | 0 mm | 8 | |
| Sept. 28 | Sunny | 34° /22° | 5.2 mm | 8 | |
| Sept. 29 | Sunny | 33° /22° | 5.6 mm | 8 | |
| Sept. 30 | Sunny | 33° /22° | 2.3 mm | 8 | |
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Harris County in September - FAQ
What are the expected maximum and minimum temperatures in Harris County during September?
How much rainfall should be expected in Harris County during September?
What are the typical wind conditions in Harris County during September?
September rainfall patterns in Harris County
UV exposure in Harris County during September
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Where is Harris County?Get accurate weather forecasts for Harris County, located at latitude 29.763 and longitude -95.363. Stay updated with localized weather information tailored for Harris County.