UV Index for Vacaville, CA

Current Vacaville UV Index

0 (Low)

Last Updated 23 minutes ago

Hourly Vacaville UV Index

The hourly Vacaville, CA UV Index forecast for Friday, September 5th, 2025.

5 Day Hourly Vacaville UV Index Forecast

Last Updated 19 hours ago

The UV index forecast for the next five days in Vacaville, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Vacaville over the next five days will be 7.8 on Sunday, September 7th at 1:00 pm.

The UV index forecast for Friday, September 5th in Vacaville, CA is below.

Time UV Index Risk
7am 0
Low
8am 0.4
Low
9am 1.4
Low
10am 3.1
Moderate
11am 5.1
Moderate
12pm 6.6
High
1pm 7.4
High
2pm 6.9
High
3pm 5.6
Moderate
4pm 3.7
Moderate
5pm 1.8
Low
6pm 0.6
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, September 6th in Vacaville, 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 1.4
Low
10am 3.2
Moderate
11am 5.2
Moderate
12pm 6.9
High
1pm 7.7
High
2pm 7.3
High
3pm 5.8
Moderate
4pm 3.8
Moderate
5pm 1.8
Low
6pm 0.6
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, September 7th in Vacaville, 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 1.3
Low
10am 3
Moderate
11am 5.3
Moderate
12pm 7
High
1pm 7.8
High
2pm 7.4
High
3pm 5.8
Moderate
4pm 3.8
Moderate
5pm 1.9
Low
6pm 0.6
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 8th in Vacaville, 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