UV Index for Santa Ana, CA

Current Santa Ana UV Index

0 (Low)

Last Updated 52 minutes ago

Hourly Santa Ana UV Index

The hourly Santa Ana, CA UV Index forecast for Tuesday, October 28th, 2025.

5 Day Hourly Santa Ana UV Index Forecast

Last Updated 10 hours ago

The UV index forecast for the next five days in Santa Ana, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Santa Ana over the next five days will be 5.3 on Tuesday, October 28th at 1:00 pm.

The UV index forecast for Tuesday, October 28th in Santa Ana, CA is below.

Time UV Index Risk
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, October 29th in Santa Ana, 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
Low
8am 0.1
Low
9am 0.8
Low
10am 2
Low
11am 3.6
Moderate
12pm 4.8
Moderate
1pm 5.2
Moderate
2pm 4.5
Moderate
3pm 3.1
Moderate
4pm 1.6
Low
5pm 0.5
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, October 30th in Santa Ana, 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
Low
8am 0.1
Low
9am 0.8
Low
10am 2
Low
11am 3.5
Moderate
12pm 4.8
Moderate
1pm 5.2
Moderate
2pm 4.6
Moderate
3pm 3.2
Moderate
4pm 1.6
Low
5pm 0.5
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, October 31st in Santa Ana, 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
Low
8am 0.1
Low
9am 0.7
Low
10am 1.8
Low
11am 3.4
Moderate
12pm 4.6
Moderate
1pm 4.9
Moderate
2pm 4.1
Moderate
3pm 2.8
Low
4pm 1.5
Low
5pm 0.4
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, November 1st in Santa Ana, 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