UV Index for Rialto, CA

Current Rialto UV Index

0 (Low)

Last Updated 58 minutes ago

Hourly Rialto UV Index

The hourly Rialto, CA UV Index forecast for Thursday, May 1st, 2025.

5 Day Hourly Rialto UV Index Forecast

Last Updated 11 hours ago

The UV index forecast for the next five days in Rialto, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Rialto over the next five days will be 8.8 on Friday, May 2nd at 1:00 pm.

The UV index forecast for Thursday, May 1st in Rialto, CA is below.

Time UV Index Risk
11pm 0
Low

The UV index forecast for Friday, May 2nd in Rialto, 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 1
Low
9am 2.5
Low
10am 4.6
Moderate
11am 6.8
High
12pm 8.3
Very High
1pm 8.8
Very High
2pm 8
Very High
3pm 6.2
High
4pm 4
Moderate
5pm 2
Low
6pm 0.7
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, May 3rd in Rialto, 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 1
Low
9am 2.4
Low
10am 4.4
Moderate
11am 6.4
High
12pm 8.2
Very High
1pm 8.5
Very High
2pm 7.5
High
3pm 5.7
Moderate
4pm 3.6
Moderate
5pm 1.8
Low
6pm 0.7
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, May 4th in Rialto, 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 0.3
Low
9am 0.7
Low
10am 1.6
Low
11am 3.9
Moderate
12pm 4.8
Moderate
1pm 4.2
Moderate
2pm 3.8
Moderate
3pm 4.4
Moderate
4pm 3.2
Moderate
5pm 1.5
Low
6pm 0.4
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, May 5th in Rialto, 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