UV Index for Yountville, CA

Current Yountville UV Index

4.4 (Moderate)

Last Updated 42 minutes ago

Hourly Yountville UV Index

The hourly Yountville, CA UV Index forecast for Saturday, June 21st, 2025.

5 Day Hourly Yountville UV Index Forecast

Last Updated 23 hours ago

The UV index forecast for the next five days in Yountville, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Yountville over the next five days will be 8.8 on Monday, June 23rd at 1:00 pm.

The UV index forecast for Saturday, June 21st in Yountville, CA is below.

Time UV Index Risk
11am 6.4
High
12pm 8.1
Very High
1pm 8.7
Very High
2pm 8.3
Very High
3pm 7
High
4pm 5.1
Moderate
5pm 3
Moderate
6pm 1.4
Low
7pm 0.5
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, June 22nd in Yountville, 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 2.4
Low
10am 4.3
Moderate
11am 6.3
High
12pm 8
Very High
1pm 8.7
Very High
2pm 8.3
Very High
3pm 7
High
4pm 5
Moderate
5pm 3
Moderate
6pm 1.4
Low
7pm 0.5
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, June 23rd in Yountville, 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 2.4
Low
10am 4.3
Moderate
11am 6.4
High
12pm 8
Very High
1pm 8.8
Very High
2pm 8.4
Very High
3pm 7
High
4pm 5
Moderate
5pm 3
Moderate
6pm 1.4
Low
7pm 0.5
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, June 24th in Yountville, 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