Harris County (Houston)
September
Weather in Harris County for September 2025
Your guide to Harris County weather in September - trends and predictions
In general, the average temperature in Harris County at the beginning of September is 32.6 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 33 °F by the end of September.
Harris County in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 77.7 mm.
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Temperatures
Rain 🌧️
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14
Dry days
16
Rainy days
0
Snow days
33°/24°
Temperatures
16 km/h
Avg max wind
63 %
Avg humidity
Harris County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  33° | 2 33° | 3 33° | 4  31° | 5 31° | 6 33° | 7  34° |
| 8  35° | 9  34° | 10 34° | 11 33° | 12  32° | 13 33° | 14 31° |
| 15 32° | 16 32° | 17 34° | 18 34° | 19 34° | 20 34° | 21 35° |
| 22 34° | 23 34° | 24 33° | 25 33° | 26 33° | 27 33° | 28 34° |
| 29 32° | 30 33° |
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Temperatures trend during September in Harris County
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September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Moderate rain at times | 33° /24° | 4.7 mm | 8 | |
| Sept. 2 | Moderate or heavy rain shower | 33° /24° | 4.5 mm | 7 | |
| Sept. 3 | Moderate rain at times | 33° /25° | 7 mm | 7 | |
| Sept. 4 | Light rain shower | 31° /24° | 2 mm | 7 | |
| Sept. 5 | Patchy rain possible | 31° /24° | 0.7 mm | 7 | |
| Sept. 6 | Patchy rain possible | 33° /25° | 0.8 mm | 7 | |
| Sept. 7 | Partly cloudy | 34° /23° | 0.7 mm | 8 | |
| Sept. 8 | Cloudy | 35° /23° | 0 mm | 8 | |
| Sept. 9 | Sunny | 34° /23° | 0.2 mm | 8 | |
| Sept. 10 | Sunny | 34° /23° | 1.3 mm | 8 | |
| Sept. 11 | Partly cloudy | 33° /22° | 2.5 mm | 8 | |
| Sept. 12 | Overcast | 32° /23° | 0 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 33° /23° | 7.7 mm | 8 | |
| Sept. 14 | Moderate rain at times | 31° /23° | 12.2 mm | 7 | |
| Sept. 15 | Patchy rain possible | 32° /23° | 1 mm | 8 | |
| Sept. 16 | Patchy rain possible | 32° /24° | 2 mm | 7 | |
| Sept. 17 | Patchy rain possible | 34° /24° | 0.6 mm | 8 | |
| Sept. 18 | Patchy rain possible | 34° /24° | 0.4 mm | 8 | |
| Sept. 19 | Cloudy | 34° /24° | 0.1 mm | 8 | |
| Sept. 20 | Moderate rain at times | 34° /24° | 0.3 mm | 8 | |
| Sept. 21 | Partly cloudy | 35° /24° | 0.1 mm | 8 | |
| Sept. 22 | Partly cloudy | 34° /23° | 0.1 mm | 8 | |
| Sept. 23 | Sunny | 34° /22° | 2.8 mm | 8 | |
| Sept. 24 | Sunny | 33° /22° | 3.6 mm | 8 | |
| Sept. 25 | Sunny | 33° /23° | 0 mm | 8 | |
| Sept. 26 | Partly cloudy | 33° /22° | 5.9 mm | 8 | |
| Sept. 27 | Patchy rain possible | 33° /22° | 0.2 mm | 8 | |
| Sept. 28 | Sunny | 34° /22° | 6.5 mm | 8 | |
| Sept. 29 | Sunny | 32° /22° | 7 mm | 8 | |
| Sept. 30 | Sunny | 33° /22° | 2.9 mm | 8 | |
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Important Notice
Our weather forecast for Harris 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 Harris County forecast closer to your planned date for the most up-to-date weather information.
Harris County in September - FAQ
What are the expected maximum and minimum temperatures in Harris County during September?
During September, expect a variety of temperatures with highs around 33° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Harris County during September?
Moderate rainfall is anticipated in Harris County during September, with a total of 77.7 mm spread over approximately 16 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Harris County during September?
The average wind speed in Harris County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Harris County
Explore the daily rainfall trends and prepare for Harris Countys September weather 💧
UV exposure in Harris County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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