UV Index for Guerneville, CA

Current Guerneville UV Index

0 (Low)

Last Updated 22 minutes ago

Hourly Guerneville UV Index

The hourly Guerneville, CA UV Index forecast for Thursday, January 8th, 2026.

5 Day Hourly Guerneville UV Index Forecast

Last Updated 2 days 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 2 on Friday, January 9th at 12:00 pm.

The UV index forecast for Thursday, January 8th in Guerneville, CA is below.

Time UV Index Risk
6am 0
Low
7am 0
Low
8am 0.1
Low
9am 0.5
Low
10am 1
Low
11am 1.6
Low
12pm 1.9
Low
1pm 1.8
Low
2pm 1.3
Low
3pm 0.7
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 Friday, January 9th 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 0.1
Low
9am 0.4
Low
10am 1
Low
11am 1.6
Low
12pm 2
Low
1pm 1.9
Low
2pm 1.4
Low
3pm 0.8
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 Saturday, January 10th in Guerneville, CA is below.

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