UV index is 8 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.

High humidity (78%) combined with the heat means it will feel more uncomfortable than the air temperature alone suggests — stay hydrated if you're active outside.

Nearby Regional Outlook

San Antonio Weather Radar

Live precipitation · Cloud cover · Wind

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Frequently Asked Questions

What is the hottest month in San Antonio?

The hottest month in San Antonio is typically August, with daytime highs averaging around 35.6°C (96°F), based on 10 years of historical weather data. Overnight lows during this period average near 25.1°C (77°F). Take extra precautions during this time stay hydrated and avoid strenuous outdoor activity in peak afternoon heat.

What is the coldest month in San Antonio?

The coldest month in San Antonio is typically January, with overnight lows averaging around 6.7°C (44°F) and daytime highs near 17.3°C (63°F), based on 10 years of historical weather data.

Does San Antonio have a rainy season?

San Antonio doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. May is the wettest month on average (about 165 mm), while January is the driest (about 52 mm).

What's the best time of year to visit San Antonio?

The best time to visit San Antonio is typically November, when daytime highs average a comfortable 22.4°C (72°F). Rainfall during this window averages around 62 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is San Antonio's air quality safe right now?

As of the latest reading, San Antonio's air quality index (AQI) is 2, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.

Atmospheric Details

Wind

8 km/h

SSE · Light Breeze · Max 22 km/h

Humidity

78 %

High · feels muggy

UV Index

Very High

Visibility

10 km

Excellent

Pressure

990 hPa

Low · change likely

Dew Point

23°C

Very humid

Today vs Normal

38°C+5° above normal

The long-term average high for today is 33°C.

27 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

Red = above normal, blue = at or below · last 12 days

Air Quality

Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Health & Activity Advice

⚠ Take Precautions

UV index is 8 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.

High humidity (78%) combined with the heat means it will feel more uncomfortable than the air temperature alone suggests — stay hydrated if you're active outside.