UV Index for Fontana, CA

Current Fontana UV Index

0 (Low)

Last Updated 33 minutes ago

Hourly Fontana UV Index

The hourly Fontana, CA UV Index forecast for Sunday, December 21st, 2025.

5 Day Hourly Fontana UV Index Forecast

Last Updated 11 hours ago

The UV index forecast for the next five days in Fontana, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Fontana over the next five days will be 3 on Sunday, December 21st at 12:00 pm.

The UV index forecast for Sunday, December 21st in Fontana, CA is below.

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

The UV index forecast for Monday, December 22nd in Fontana, 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 1
Low
10am 1.9
Low
11am 2.6
Low
12pm 2.8
Low
1pm 2.4
Low
2pm 1.5
Low
3pm 0.7
Low
4pm 0.2
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, December 23rd in Fontana, 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
Low
11am 1.2
Low
12pm 1.2
Low
1pm 1.4
Low
2pm 1
Low
3pm 0.6
Low
4pm 0.2
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, December 24th in Fontana, 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
Low
9am 0
Low
10am 0.1
Low
11am 0.8
Low
12pm 0.2
Low
1pm 0.2
Low
2pm 0.3
Low
3pm 0.4
Low
4pm 0.2
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, December 25th in Fontana, CA is below.

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