San Antonio Weather in August: Climate, Temperature & Travel Tips
Avg 29.8°C · 78mm rain — August is summer in San Antonio.
- Avg high
- 35.4 °C
- Avg low
- 24.9 °C
- Avg
- 29.8 °C
- Precipitation
- 78 mm
Source: Open-Meteo Archive 2014–2023 · 10-year climate normals
Climate Overview
August in San Antonio, United States brings summer conditions: average temperature 29.8°C, average high 35.4°C, average low 24.9°C. Monthly rainfall averages 78mm, making it a moderate-rainfall 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
- A light rain jacket as backup
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 August
Pros:
- A unique seasonal character that locals enjoy
Cons:
- Hot weather may limit midday outdoor activities
- Peak season — expect higher prices and more crowds
Climate source: Open-Meteo Archive (2014–2023).
Colour = avg temperature · blue = cool · orange = warm
- 1 August 29.8°C
- 2 July 29.7°C
- 3 June 28.0°C
- 1 January 11.6°C
- 2 February 13.3°C
- 3 December 13.4°C
FAQ
01 What is the average temperature in San Antonio in August? +
The average is 29.8°C, with a high of 35°C and a low of 25°C.
02 What is San Antonio like to visit in August? +
It is summer in San Antonio, which is hot — plan around midday heat.
03 Does it rain often in San Antonio during August? +
Average rainfall is 78mm, which is moderate.
04 What should I pack for San Antonio in August? +
Lightweight breathable clothing; sun hat; Sunscreen and ample hydration.
05 Is August a peak travel season for San Antonio? +
Generally yes — book accommodations and flights well in advance.
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