30YearWeather
San Antonio in August
San Antonio weather in August - United States
☀️Hot & Sunny

San Antonio Weather in August

Plan your August trip to San Antonio, United States. Based on 30 years of NASA data, expect temperatures of 35°C (high) to 25°C (low), with 14% rain probability and 8 hours of daily sunshine. Great conditions with only 0 rainy days expected.

Avg High
35°C

Hottest around day 11

Avg Low
25°C

Coolest around day 30

Rainy Days
0days

14% avg rain chance

Sunshine
8hrs/day

Summer season

San Antonio August Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

As of Dec 2021, San Antonio has 5G from ...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for San Antonio

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate
46/ 100
Traffic Index

Balanced traffic

Peak Daily Arrivals

0

slots per day

Peak

Jun

Low

Feb

Monthly Traffic Distribution

111
Jan
109
Feb
130
Mar
158
Apr
158
May
163
Jun
119
Jul
135
Aug
135
Sep
135
Oct
135
Nov
135
Dec
Traffic Level
Low Season

Key Connections

Dallas-Fort Worth (DFW)
Denver (DEN)
Phoenix Sky Harbor (PHX)
Dallas Love Field (DAL)
Houston George Bush (IAH)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is August a Good Time to Visit San Antonio?

👌A reasonable choice for your trip
Short Answer

Expect challenging weather in San Antonio during August - 36°C combined with 61% humidity creates a heat index of 47°C. Air conditioning and strategic planning are essential.

Decision Factors

Extreme heat danger

35.5°C highs, potentially dangerous for outdoor activities

Feels significantly hotter than 35.5°C

Heat index: 47°C due to 61% humidity

Excellent dry conditions

Only 14% rain probability - ideal for outdoor activities

Plenty of sunshine

11.4h of sunshine daily

Shoulder season - balanced conditions

83% of peak - good value with moderate crowds

Exceptional dining scene

15 Michelin-listed restaurants

Good For

  • 📸
    Photographers

    11.4h sunshine, 57% clear skies for golden hour shots

  • 💑
    Honeymoon couples

    Wedding score 88/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👨‍👩‍👧‍👦
    Families with children

    47°C heat index dangerous for children

  • 👴
    Elderly travelers

    Heat index of 47°C poses health risks

  • 🥾
    Outdoor enthusiasts

    Extreme conditions limit outdoor activity options

  • 🌡️
    Heat-sensitive visitors

    47°C feels-like temperature creates discomfort

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Antonio in August averages 35°C with 14% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: San Antonio in August

What are the temperatures in San Antonio in August?

Daytime highs average 35°C, nights drop to 25°C. Temperatures remain fairly consistent.

How many rainy days in San Antonio in August?

Expect around 0 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in San Antonio in August?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is August peak season in San Antonio?

This is shoulder season—moderate prices and manageable crowds.