UV Index for Rialto, CA

Current Rialto UV Index

0 (Low)

Last Updated 16 minutes ago

Hourly Rialto UV Index

The hourly Rialto, CA UV Index forecast for Sunday, February 8th, 2026.

5 Day Hourly Rialto UV Index Forecast

Last Updated 10 hours ago

The UV index forecast for the next five days in Rialto, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Rialto over the next five days will be 4.2 on Sunday, February 8th at 12:00 pm.

The UV index forecast for Sunday, February 8th in Rialto, CA is below.

Time UV Index Risk
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, February 9th 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 0.1
Low
8am 0.7
Low
9am 1.7
Low
10am 2.9
Low
11am 4
Moderate
12pm 4.2
Moderate
1pm 3.7
Moderate
2pm 2.3
Low
3pm 1.2
Low
4pm 0.4
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, February 10th 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 0.1
Low
8am 0.6
Low
9am 1.6
Low
10am 2.9
Low
11am 4.1
Moderate
12pm 3.8
Moderate
1pm 3.4
Moderate
2pm 2.4
Low
3pm 1
Low
4pm 0.3
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, February 11th 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 0.1
Low
8am 0.5
Low
9am 1.2
Low
10am 2
Low
11am 2.5
Low
12pm 2.5
Low
1pm 2.5
Low
2pm 1.5
Low
3pm 1
Low
4pm 0.3
Low
5pm 0
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, February 12th in Rialto, CA is below.

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