Houston Weather in September: Climate, Temperature & Travel Tips
Avg 26.3°C · 190mm rain — September is autumn in Houston.
- Avg high
- 30.7 °C
- Avg low
- 22.7 °C
- Avg
- 26.3 °C
- Precipitation
- 190 mm
Source: Open-Meteo Archive 2014–2023 · 10-year climate normals
Climate Overview
September in Houston, United States brings autumn conditions: average temperature 26.3°C, average high 30.7°C, average low 22.7°C. Monthly rainfall averages 190mm, making it a wet time of year.
Plan outdoor activities around midday heat with shade and frequent hydration.
What to Pack
- Lightweight breathable clothing; sun hat
- Sunscreen and ample hydration
- Compact umbrella and waterproof jacket
Best Things to Do
- Visit outdoor sights in early morning or late afternoon
- Air-conditioned museums and galleries
- Pool or waterfront activities
Pros and Cons of Visiting in September
Pros:
- Shoulder season often means smaller crowds and lower prices
Cons:
- Hot weather may limit midday outdoor activities
- Frequent rain — pack waterproof gear
Climate source: Open-Meteo Archive (2014–2023).
Colour = avg temperature · blue = cool · orange = warm
- 1 August 28.5°C
- 2 July 28.4°C
- 3 June 27.2°C
- 1 January 11.9°C
- 2 February 13.9°C
- 3 December 14.3°C
FAQ
01 What is the average temperature in Houston in September? +
The average is 26.3°C, with a high of 31°C and a low of 23°C.
02 What is Houston like to visit in September? +
It is autumn in Houston, which is hot — plan around midday heat.
03 Does it rain often in Houston during September? +
Average rainfall is 190mm, which is high — expect frequent rain.
04 What should I pack for Houston in September? +
Lightweight breathable clothing; sun hat; Sunscreen and ample hydration.
05 Is September a peak travel season for Houston? +
It is closer to off-season, with more reasonable prices and fewer crowds.
06 Where does this climate data come from? +
Monthly averages computed from Open-Meteo Archive 2014–2023 daily observations.
- Sources
- Open-Meteo Archive 2014-2023
- Updated
- 2026-04-17