UV Index for Guerneville, CA

Current Guerneville UV Index

0 (Low)

Last Updated 18 minutes ago

Hourly Guerneville UV Index

The hourly Guerneville, CA UV Index forecast for Sunday, February 22nd, 2026.

5 Day Hourly Guerneville UV Index Forecast

Last Updated 21 hours ago

The UV index forecast for the next five days in Guerneville, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Guerneville over the next five days will be 3.2 on Monday, February 23rd at 1:00 pm.

The UV index forecast for Sunday, February 22nd in Guerneville, CA is below.

Time UV Index Risk
8am 0
Low
9am 0.3
Low
10am 0.5
Low
11am 1.2
Low
12pm 1.4
Low
1pm 1.6
Low
2pm 1
Low
3pm 0.6
Low
4pm 0.3
Low
5pm 0.1
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, February 23rd in Guerneville, 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 0.8
Low
10am 2.2
Low
11am 2.6
Low
12pm 1.4
Low
1pm 3.2
Moderate
2pm 2.3
Low
3pm 0.9
Low
4pm 0.2
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, February 24th in Guerneville, 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
Low
9am 0.1
Low
10am 0.1
Low
11am 0.2
Low
12pm 0.2
Low
1pm 0.2
Low
2pm 0.2
Low
3pm 0.1
Low
4pm 0.1
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, February 25th in Guerneville, CA is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low