UV Index for San Marcos, TX

Current San Marcos UV Index

0 (Low)

Last Updated 55 minutes ago

Hourly San Marcos UV Index

The hourly San Marcos, TX UV Index forecast for Saturday, July 5th, 2025.

5 Day Hourly San Marcos UV Index Forecast

Last Updated 9 hours ago

The UV index forecast for the next five days in San Marcos, TX has 2 days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in San Marcos over the next five days will be 11.9 on Monday, July 7th at 1:00 pm.

The UV index forecast for Saturday, July 5th in San Marcos, TX is below.

Time UV Index Risk
11pm 0
Low

The UV index forecast for Sunday, July 6th 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 3.7
Moderate
11am 5
Moderate
12pm 6
High
1pm 7.1
High
2pm 7
High
3pm 7.8
High
4pm 7.4
High
5pm 4.4
Moderate
6pm 2.2
Low
7pm 0.4
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, July 7th 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 2.1
Low
10am 4.6
Moderate
11am 7.5
High
12pm 10.2
Very High
1pm 11.9
Extreme
2pm 11.9
Extreme
3pm 7.4
High
4pm 1.5
Low
5pm 1.4
Low
6pm 1.8
Low
7pm 0.7
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, July 8th 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 7.2
High
12pm 9.8
Very High
1pm 11.4
Extreme
2pm 11.3
Extreme
3pm 7.2
High
4pm 4.8
Moderate
5pm 4.4
Moderate
6pm 2
Low
7pm 0.5
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, July 9th 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