San Antonio Weather in August 2026: what to expect (4.7/10)

The month in detail

What to expect in August

In the height of summer, San Antonio sees high temperatures (36.0°F). Heat is a factor for outdoor activities. Expect rain on 26.0% of days — a light raincoat in the bag is recommended.

August ranks 11 out of 12 months in San Antonio. Compared to July: −0.5h of sun per day.

This month's conditions

What it's like in August

UV index

8 · very high

protection essential

Feels like

muggy at times

21°

Daylight

13.1h of daylight

Air quality

good

AQI 36

Compare

Is August the right month?

The best month in San Antonio is October (8.4/10), 3.7 pts higher than August.

See October →See all 12 months →

Context

Our verdict

San Antonio, in Texas: 1.5 million inhabitants (7th largest city in the USA), founded by the Spanish in 1718, the most historic "Hispanic" city in the USA after Saint Augustine.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

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Stay

Hotels & rentals · San Antonio

Expedia →

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Activities

Tours, tickets, experiences

See ↓

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Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · San Antonio

GetYourGuide selection · free cancellation

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Affiliate link · GetYourGuide

Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a city break.

Country · United States

🗣️LanguageEnglish

💶CurrencyUS Dollar ($)

🚗DrivingRight-hand

🛡️Safety ⓘVery safe · 1/5

💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeTemperate

📈Climate trend ⓘ+2.42°F/decade

🔥Hottest monthJuly · 97°F

❄️Coolest monthJanuary · 64°F

🌧️Rainiest month ⓘMay · 47%

🏛️ City break

📅Tourist peak seasonJune → August

☔Indoor sights ⓘYear-round

🚇Public transportGood

Explore

Other destinations in August

If August doesn't convince you for this destination, compare with others.

Similar climate

AustinUnited States

MateraItaly

HonoluluUnited States

MonacoMonaco

BolognaItaly

Nearby

New OrleansUSA815 km

San Miguel de AllendeMexico973 km

GuanajuatoMexico975 km

Santa FeUnited States986 km

Other top picks

Cape VerdeCape Verde5.3

Marsa AlamEgypt5.3

Sharm el-SheikhEgypt5.3

HurghadaEgypt5.4

La PalmaSpain6.2

← July September →

🗺️ See all 754 destinations on the map

Location

Where is San Antonio ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

United States

Temperate climate with a 8.4 → 4.7 gap between best and worst month. 10 years of ERA5 data to choose by project.

29.42°N · 98.49°W

Questions

Frequently asked questions

What is the best time to visit San Antonio?

October is the best month with 84°F highs, 66°F lows, 7.0h of sunshine and 25.0% rainy days. The months of October & April offer comparable conditions.

How many hours of sunshine does San Antonio get in October?

San Antonio averages 7.0 sunshine hours per day in October. It is the sunniest month with a climate score of 7.9/10.

What is the rainiest month in San Antonio?

July is the most unfavourable month with July has the lowest climate score of the year and the lowest climate score of the year.

What are the temperatures at night in San Antonio in October?

In October, overnight lows reach 66°F, while afternoon highs average 84°F.

Is San Antonio good in winter?

In winter (December-February), San Antonio scores 7.1/10 on average — Acceptable conditions for cultural visits.. The best month overall remains October with a score of 7.9/10.

When should you avoid San Antonio?

July is the most difficult month to visit San Antonio, with July has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.

Do you need sun protection in San Antonio in August?

The average UV index reaches 8 in August in San Antonio (very high), with about 13.1h of daylight. Protection essential.