UV Index for Napa, CA

Current Napa UV Index

0 (Low)

Last Updated 34 minutes ago

Hourly Napa UV Index

The hourly Napa, CA UV Index forecast for Sunday, July 6th, 2025.

5 Day Hourly Napa UV Index Forecast

Last Updated 17 hours ago

The UV index forecast for the next five days in Napa, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Napa over the next five days will be 9.9 on Tuesday, July 8th at 1:00 pm.

The UV index forecast for Sunday, July 6th in Napa, CA is below.

Time UV Index Risk
5am 0
Low
6am 0
Low
7am 0.3
Low
8am 1.1
Low
9am 2.4
Low
10am 4.4
Moderate
11am 6.6
High
12pm 7.7
High
1pm 8.4
Very High
2pm 8
Very High
3pm 6.4
High
4pm 4.5
Moderate
5pm 2.6
Low
6pm 1.4
Low
7pm 0.4
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, July 7th in Napa, 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 0.2
Low
8am 0.9
Low
9am 2.2
Low
10am 4
Moderate
11am 6
High
12pm 8
Very High
1pm 8.8
Very High
2pm 8.3
Very High
3pm 7.5
High
4pm 5.4
Moderate
5pm 3.2
Moderate
6pm 1.5
Low
7pm 0.5
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, July 8th in Napa, 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 0.3
Low
8am 1.1
Low
9am 2.7
Low
10am 4.8
Moderate
11am 7.2
High
12pm 9
Very High
1pm 9.9
Very High
2pm 9.5
Very High
3pm 8
Very High
4pm 5.8
Moderate
5pm 3.4
Moderate
6pm 1.6
Low
7pm 0.5
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, July 9th in Napa, 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