Houston Weather in September
Thinking of visiting Houston in September? Expect very high temperatures reaching 32°C (90°F) during the day, dropping to 23°C (73°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Houston in September
Based on our climate data of the past 30 years, about 13 days of rain are anticipated, with 157 mm (6.2 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Houston in September
September in Houston brings typical temperatures with highs around 32°C (90°F) and lows of 23°C (73°F). Mornings and evenings are often more comfortable than the peak afternoon hours. With lows of 23°C (73°F), the nights are warm and generally comfortable.
Sunshine in Houston in September
The month enjoys around 235 hours of sunshine, creating mostly sunny days with good weather conditions.
Wind Speed in Houston in September
Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.If you prefer enjoying temperate temperatures and rain-free days, March typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Houston's climate page.
Houston Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
32°C (90°F)
Chance of Rain
42%
Precipitation
157 mm (6.2 in)
Rainy days
13 days
Humidity
77%
Windspeed
3 m/s (6 knots)
Sunshine
235 hours
Percentage Sunshine
64%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Houston typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows typically ranging from 19°C (66°F) to 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Houston in September
Browse day-by-day weather records for Houston spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Houston historical weather extremes in September
Our historical data for Houston spans 1976 to 2025, revealing these weather extremes.
- Houston recorded its highest September temperature of 43°C (109°F) on September 4, 2000.
- The lowest daytime temperature in September was 19°C (66°F), recorded on September 30, 1985.
- Houston registered its coldest September night on September 26, 2000, with temperatures dropping to 9°C (48°F).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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What to Wear in Houston in September
Warm but pleasant conditions in Houston in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Houston in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Houston's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Houston climate overview or explore weather in the United States of America.
