UV Index for Cupertino, CA

Current Cupertino UV Index

0 (Low)

Last Updated 54 seconds ago

Hourly Cupertino UV Index

The hourly Cupertino, CA UV Index forecast for Tuesday, October 21st, 2025.

5 Day Hourly Cupertino UV Index Forecast

Last Updated 15 hours ago

The UV index forecast for the next five days in Cupertino, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Cupertino over the next five days will be 4.6 on Thursday, October 23rd at 1:00 pm.

The UV index forecast for Tuesday, October 21st in Cupertino, CA is below.

Time UV Index Risk
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0
Low
9am 0.4
Low
10am 1.4
Low
11am 2.6
Low
12pm 3.8
Moderate
1pm 4.4
Moderate
2pm 4.1
Moderate
3pm 3.1
Moderate
4pm 1.8
Low
5pm 0.7
Low
6pm 0.1
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, October 22nd in Cupertino, 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 1.3
Low
12pm 2.4
Low
1pm 2.7
Low
2pm 3.9
Moderate
3pm 3
Moderate
4pm 1.6
Low
5pm 0.6
Low
6pm 0.1
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, October 23rd in Cupertino, 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 1.4
Low
11am 2.8
Low
12pm 4
Moderate
1pm 4.6
Moderate
2pm 4.3
Moderate
3pm 3.2
Moderate
4pm 1.8
Low
5pm 0.7
Low
6pm 0.1
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, October 24th in Cupertino, 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