UV Index for Arcata, CA

Current Arcata UV Index

0 (Low)

Last Updated 5 minutes ago

Hourly Arcata UV Index

The hourly Arcata, CA UV Index forecast for Wednesday, October 15th, 2025.

5 Day Hourly Arcata UV Index Forecast

Last Updated 14 hours ago

The UV index forecast for the next five days in Arcata, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Arcata over the next five days will be 4.2 on Thursday, October 16th at 1:00 pm.

The UV index forecast for Wednesday, October 15th in Arcata, CA is below.

Time UV Index Risk
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0
Low
9am 0.4
Low
10am 1.2
Low
11am 2.3
Low
12pm 3.3
Moderate
1pm 3.6
Moderate
2pm 3.6
Moderate
3pm 2.9
Low
4pm 1.9
Low
5pm 0.8
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, October 16th in Arcata, 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 0.4
Low
10am 1
Low
11am 2.3
Low
12pm 3.5
Moderate
1pm 4.2
Moderate
2pm 4
Moderate
3pm 3.2
Moderate
4pm 1.9
Low
5pm 0.8
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, October 17th in Arcata, 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 0.4
Low
10am 1.1
Low
11am 2.2
Low
12pm 3.3
Moderate
1pm 4
Moderate
2pm 4
Moderate
3pm 3.3
Moderate
4pm 2
Low
5pm 0.8
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, October 18th in Arcata, 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