UV Index for San Marcos, CA

Current San Marcos UV Index

0 (Low)

Last Updated 2 minutes ago

Hourly San Marcos UV Index

The hourly San Marcos, CA UV Index forecast for Friday, April 18th, 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, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in San Marcos over the next five days will be 8.4 on Saturday, April 19th at 1:00 pm.

The UV index forecast for Friday, April 18th in San Marcos, CA is below.

Time UV Index Risk
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0.2
Low
8am 0.8
Low
9am 2
Low
10am 3.8
Moderate
11am 5.6
Moderate
12pm 7
High
1pm 7.4
High
2pm 6.7
High
3pm 5.1
Moderate
4pm 3.2
Moderate
5pm 1.6
Low
6pm 0.5
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, April 19th in San Marcos, CA 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 0.2
Low
8am 0.8
Low
9am 2.2
Low
10am 4.2
Moderate
11am 6.4
High
12pm 7.9
High
1pm 8.4
Very High
2pm 7.6
High
3pm 5.8
Moderate
4pm 3.6
Moderate
5pm 1.7
Low
6pm 0.6
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, April 20th in San Marcos, CA 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 0.2
Low
8am 0.8
Low
9am 2.3
Low
10am 4.3
Moderate
11am 6.4
High
12pm 8
Very High
1pm 8.4
Very High
2pm 7.6
High
3pm 5.8
Moderate
4pm 3.6
Moderate
5pm 1.7
Low
6pm 0.6
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, April 21st in San Marcos, CA is below.

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