Houston
September
Weather in Houston for September 2025
Your guide to Houston weather in September - trends and predictions
In general, the average temperature in Houston at the beginning of September is 34.1 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 34.4 °F by the end of September.
Houston sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
36°/26°
Temperatures
18 km/h
Avg max wind
60 %
Avg humidity
Houston in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2  35° | 3  35° | 4 32° | 5 32° | 6  35° | 7  36° |
| 8 37° | 9 35° | 10 35° | 11 33° | 12  33° | 13 35° | 14  34° |
| 15 35° | 16 34° | 17  36° | 18 36° | 19 35° | 20 34° | 21 35° |
| 22 35° | 23 35° | 24 34° | 25 34° | 26 33° | 27 34° | 28 36° |
| 29 34° | 30 36° |
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Temperatures trend during September in Houston
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 34° /25° | 4.3 mm | 8 | |
| Sept. 2 | Patchy rain possible | 35° /24° | 1.8 mm | 8 | |
| Sept. 3 | Thundery outbreaks possible | 35° /25° | 0.2 mm | 8 | |
| Sept. 4 | Light rain shower | 32° /26° | 3.5 mm | 7 | |
| Sept. 5 | Patchy rain possible | 32° /25° | 1.3 mm | 7 | |
| Sept. 6 | Cloudy | 35° /25° | 0.1 mm | 8 | |
| Sept. 7 | Partly cloudy | 36° /24° | 0 mm | 9 | |
| Sept. 8 | Cloudy | 37° /24° | 0 mm | 9 | |
| Sept. 9 | Thundery outbreaks possible | 35° /24° | 0.1 mm | 8 | |
| Sept. 10 | Partly cloudy | 35° /25° | 2.5 mm | 8 | |
| Sept. 11 | Partly cloudy | 33° /23° | 5 mm | 8 | |
| Sept. 12 | Overcast | 33° /24° | 0.1 mm | 8 | |
| Sept. 13 | Cloudy | 35° /24° | 0 mm | 8 | |
| Sept. 14 | Moderate or heavy rain shower | 34° /25° | 7.4 mm | 8 | |
| Sept. 15 | Light rain shower | 35° /25° | 1.6 mm | 9 | |
| Sept. 16 | Patchy rain possible | 34° /25° | 0.4 mm | 8 | |
| Sept. 17 | Light drizzle | 36° /25° | 0.5 mm | 8 | |
| Sept. 18 | Patchy rain possible | 36° /25° | 0.1 mm | 8 | |
| Sept. 19 | Partly cloudy | 35° /24° | 0 mm | 8 | |
| Sept. 20 | Patchy rain possible | 34° /24° | 0.1 mm | 8 | |
| Sept. 21 | Thundery outbreaks possible | 35° /25° | 0.2 mm | 8 | |
| Sept. 22 | Patchy light drizzle | 35° /25° | 0.2 mm | 8 | |
| Sept. 23 | Overcast | 35° /25° | 5.7 mm | 8 | |
| Sept. 24 | Overcast | 34° /24° | 7.3 mm | 8 | |
| Sept. 25 | Overcast | 34° /25° | 0 mm | 8 | |
| Sept. 26 | Patchy rain possible | 33° /23° | 11.7 mm | 8 | |
| Sept. 27 | Patchy rain possible | 34° /23° | 0.2 mm | 8 | |
| Sept. 28 | Cloudy | 36° /23° | 0 mm | 9 | |
| Sept. 29 | Thundery outbreaks possible | 34° /23° | 0 mm | 8 | |
| Sept. 30 | Patchy rain possible | 36° /24° | 0.1 mm | 9 | |
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Important Notice
Our weather forecast for Houston 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 Houston forecast closer to your planned date for the most up-to-date weather information.
Houston in September - FAQ
What are the expected maximum and minimum temperatures in Houston during September?
With daytime temperatures soaring above 36° and not dropping much below 26° at night, September in Houston is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Houston during September?
In September, Houston can expect light to moderate rainfall, totaling 38.5 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Houston during September?
The average wind speed in Houston during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Houston
Explore the daily rainfall trends and prepare for Houstons September weather 💧
UV exposure in Houston during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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