UV Index for Fountain Valley, CA

Current Fountain Valley UV Index

0 (Low)

Last Updated 8 minutes ago

Hourly Fountain Valley UV Index

The hourly Fountain Valley, CA UV Index forecast for Tuesday, September 16th, 2025.

5 Day Hourly Fountain Valley UV Index Forecast

Last Updated 15 hours ago

The UV index forecast for the next five days in Fountain Valley, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Fountain Valley over the next five days will be 8.4 on Tuesday, September 16th at 1:00 pm.

The UV index forecast for Tuesday, September 16th in Fountain Valley, CA is below.

Time UV Index Risk
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.5
Low
9am 1.8
Low
10am 3.8
Moderate
11am 6.1
High
12pm 7.8
High
1pm 8.4
Very High
2pm 7.5
High
3pm 5.6
Moderate
4pm 3.2
Moderate
5pm 1.4
Low
6pm 0.4
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, September 17th in Fountain Valley, 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 0.5
Low
9am 1.6
Low
10am 3.5
Moderate
11am 5.6
Moderate
12pm 6
High
1pm 5.8
Moderate
2pm 5.6
Moderate
3pm 4.1
Moderate
4pm 2.4
Low
5pm 0.5
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, September 18th in Fountain Valley, 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 0.5
Low
9am 1.7
Low
10am 3.7
Moderate
11am 6
High
12pm 7.8
High
1pm 8.4
Very High
2pm 7.7
High
3pm 5.6
Moderate
4pm 3.2
Moderate
5pm 1.1
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, September 19th in Fountain Valley, 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