UV Index Today in San Antonio, Texas (TX)

Saturday, August 8, 2026 -12:00 PM CDT (GMT-5)

The UV Index in San Antonio, Texas (TX) right now is 9.1. This reading was last updated at 12:00 PM CDT, about less than a minute ago. The UV Index at1:00 PM CDT, in about 59 minutes from now, is expected to be 10.8.

The maximum UV Index today in San Antonio is expected to be 10.9 at 2:00 PM CDT,1 hour and 59 minutes from now. The maximum UV Index tomorrow is expected to be 11 at 2:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

August 8
10.9
2:00 PM CDT
Extreme

Tomorrow

August 9
11
2:00 PM CDT
Extreme

UV Index Today Hourly

August 8

UV levels in San Antonio, Texas (TX) are projected to top out at 10.9 today, hitting Extreme risk near 2:00 PM CDT.

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)Now: 12:00 PM00.41.53.76.59.110.810.99.46.841.80.30
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

August 9

Sun intensity in San Antonio, Texas (TX) is at its highest tomorrow at 2:00 PM CDT, registering UV Index 11 (Extreme risk).

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)00.41.63.86.69.210.9119.56.94.11.70.30
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

August 7, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.4
Low
9:00 AM1.6
Low
10:00 AM3.8
Moderate
11:00 AM6.6
High
12:00 PM9.4
Very High
1:00 PM11.1
Extreme
2:00 PM11.2
Extreme
3:00 PM9.7
Very High
4:00 PM7
High
5:00 PM1.9
Low
6:00 PM0.6
Low
7:00 PM0.3
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 8, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.4
Low
9:00 AM1.5
Low
10:00 AM3.7
Moderate
11:00 AM6.5
High
12:00 PM9.1
Very High
1:00 PM10.8
Extreme
2:00 PM10.9
Extreme
3:00 PM9.4
Very High
4:00 PM6.8
High
5:00 PM4
Moderate
6:00 PM1.8
Low
7:00 PM0.3
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 9, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.4
Low
9:00 AM1.6
Low
10:00 AM3.8
Moderate
11:00 AM6.6
High
12:00 PM9.2
Very High
1:00 PM10.9
Extreme
2:00 PM11
Extreme
3:00 PM9.5
Very High
4:00 PM6.9
High
5:00 PM4.1
Moderate
6:00 PM1.7
Low
7:00 PM0.3
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 10, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.4
Low
9:00 AM1.6
Low
10:00 AM3.8
Moderate
11:00 AM6.7
High
12:00 PM9.4
Very High
1:00 PM11.2
Extreme
2:00 PM11.4
Extreme
3:00 PM9.7
Very High
4:00 PM7.1
High
5:00 PM3.4
Moderate
6:00 PM1.1
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 11, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.4
Low
9:00 AM1.6
Low
10:00 AM3.8
Moderate
11:00 AM6.6
High
12:00 PM9.3
Very High
1:00 PM11
Extreme
2:00 PM11.1
Extreme
3:00 PM9.6
Very High
4:00 PM7
High
5:00 PM4.1
Moderate
6:00 PM1.8
Low
7:00 PM0.5
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low
Data Source: National Oceanic and Atmospheric Administration (NOAA)

Nearby Places

Maximum UV Index Today
Data Source: National Oceanic and Atmospheric Administration (NOAA)