UV Index for Napa, CA

Current Napa UV Index

10.3 (Very High)

Last Updated 10 seconds ago

Hourly Napa UV Index

The hourly Napa, CA UV Index forecast for Monday, July 14th, 2025.

5 Day Hourly Napa UV Index Forecast

Last Updated 1 day 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 10.8 on Monday, July 14th at 1:00 pm.

The UV index forecast for Monday, July 14th in Napa, CA is below.

Time UV Index Risk
3pm 8.6
Very High
4pm 6.1
High
5pm 3.6
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 Tuesday, July 15th 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 5
Moderate
11am 7.6
High
12pm 9.5
Very High
1pm 10.5
Very High
2pm 10
Very High
3pm 8.1
Very High
4pm 5.8
Moderate
5pm 3.4
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 Wednesday, July 16th 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
Low
9am 2.6
Low
10am 5
Moderate
11am 7.7
High
12pm 9.8
Very High
1pm 10.8
Very High
2pm 10.3
Very High
3pm 8.6
Very High
4pm 6.1
High
5pm 3.6
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 Thursday, July 17th 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