UV Index for Vallejo, CA

Current Vallejo UV Index

3.1 (Moderate)

Last Updated 39 minutes ago

Hourly Vallejo UV Index

The hourly Vallejo, CA UV Index forecast for Wednesday, September 17th, 2025.

5 Day Hourly Vallejo UV Index Forecast

Last Updated 5 hours ago

The UV index forecast for the next five days in Vallejo, CA has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in Vallejo over the next five days will be 7.1 on Wednesday, September 17th at 1:00 pm.

The UV index forecast for Wednesday, September 17th in Vallejo, CA is below.

Time UV Index Risk
5pm 1.2
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 Thursday, September 18th in Vallejo, 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 2.2
Low
11am 4.3
Moderate
12pm 6
High
1pm 6.6
High
2pm 6.4
High
3pm 4.9
Moderate
4pm 2.9
Low
5pm 1.3
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 Friday, September 19th in Vallejo, 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 0.9
Low
10am 2.2
Low
11am 4.2
Moderate
12pm 5.7
Moderate
1pm 6.4
High
2pm 6.4
High
3pm 5.1
Moderate
4pm 3.2
Moderate
5pm 1.5
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 Saturday, September 20th in Vallejo, 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 1
Low
10am 2.5
Low
11am 4.2
Moderate
12pm 5.8
Moderate
1pm 6.6
High
2pm 6.2
High
3pm 4.9
Moderate
4pm 3.1
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 Sunday, September 21st in Vallejo, 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