UV Index for San Marcos, TX

Current San Marcos UV Index

0 (Low)

Last Updated 8 minutes ago

Hourly San Marcos UV Index

The hourly San Marcos, TX UV Index forecast for Saturday, July 12th, 2025.

5 Day Hourly San Marcos UV Index Forecast

Last Updated 13 hours ago

The UV index forecast for the next five days in San Marcos, TX has 2 days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in San Marcos over the next five days will be 11.9 on Sunday, July 13th at 2:00 pm.

The UV index forecast for Saturday, July 12th in San Marcos, TX is below.

Time UV Index Risk
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.6
Low
9am 2
Low
10am 4.4
Moderate
11am 7.3
High
12pm 8.4
Very High
1pm 3.7
Moderate
2pm 1.9
Low
3pm 2.7
Low
4pm 1.4
Low
5pm 2
Low
6pm 2.1
Low
7pm 0.7
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, July 13th in San Marcos, TX is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.6
Low
9am 2
Low
10am 4.4
Moderate
11am 7.4
High
12pm 10.1
Very High
1pm 11.8
Extreme
2pm 11.9
Extreme
3pm 10.3
Very High
4pm 7.4
High
5pm 4.2
Moderate
6pm 2.2
Low
7pm 0.7
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, July 14th in San Marcos, TX is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.6
Low
9am 2
Low
10am 4.4
Moderate
11am 7.4
High
12pm 10
Very High
1pm 11.6
Extreme
2pm 11.6
Extreme
3pm 10.1
Very High
4pm 7.4
High
5pm 4.5
Moderate
6pm 2.1
Low
7pm 0.7
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, July 15th in San Marcos, TX is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low