UV Index for Fullerton, CA

Current Fullerton UV Index

2.1 (Low)

Last Updated 2 minutes ago

Hourly Fullerton UV Index

The hourly Fullerton, CA UV Index forecast for Wednesday, November 19th, 2025.

5 Day Hourly Fullerton UV Index Forecast

Last Updated 4 hours ago

The UV index forecast for the next five days in Fullerton, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Fullerton over the next five days will be 3.4 on Wednesday, November 19th at 12:00 pm.

The UV index forecast for Wednesday, November 19th in Fullerton, CA is below.

Time UV Index Risk
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, November 20th in Fullerton, 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 0.4
Low
9am 1.2
Low
10am 2.2
Low
11am 2
Low
12pm 3
Moderate
1pm 2.7
Low
2pm 1.2
Low
3pm 0.2
Low
4pm 0
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 Friday, November 21st in Fullerton, 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 0.2
Low
9am 0.2
Low
10am 0.3
Low
11am 1.1
Low
12pm 1.6
Low
1pm 2.1
Low
2pm 1.2
Low
3pm 0.7
Low
4pm 0.1
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 Saturday, November 22nd in Fullerton, 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 0.4
Low
9am 1.2
Low
10am 2.2
Low
11am 3.1
Moderate
12pm 3.4
Moderate
1pm 3
Moderate
2pm 2
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 Sunday, November 23rd in Fullerton, CA is below.

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