San Antonio UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index10.1
- Avg Clouds13%
- Max Temp37.2 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in San Antonio, United States 
will reach a high of 10.1 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!
Last checked: 2025-08-04
Hourly Forecast Chart
Today's Safety Tips
The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.
San Antonio's UV Index
San Antonio’s UV index ranges from low in winter to very high in summer, often reaching 8 to 10 on hot days. This means the sun’s rays are strongest in summer months.
Weather Seasons
San Antonio experiences hot, humid summers with temperatures often above 90°F (32°C), and mild winters with temperatures around 50-60°F (10-15°C). Rainfall peaks in spring and early fall, with drier winters.
San Antonio's Climate
Compared to nearby cities in Texas, San Antonio is warmer than Dallas in winter but cooler than Houston in summer. It is drier than Houston and eastern states but wetter than western Texas and New Mexico.
Hourly UV Index Trend
See the UV index hour by hour for San Antonio. When the level is high, it's smart to find some shade.
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