UV Index for Hillsborough, CA

Current Hillsborough UV Index

0 (Low)

Last Updated 26 minutes ago

Hourly Hillsborough UV Index

The hourly Hillsborough, CA UV Index forecast for Monday, December 29th, 2025.

5 Day Hourly Hillsborough UV Index Forecast

Last Updated 11 hours ago

The UV index forecast for the next five days in Hillsborough, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Hillsborough over the next five days will be 2.1 on Monday, December 29th at 12:00 pm.

The UV index forecast for Monday, December 29th in Hillsborough, CA is below.

Time UV Index Risk
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, December 30th in Hillsborough, 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 0.5
Low
10am 1
Low
11am 1.5
Low
12pm 1.8
Low
1pm 1.9
Low
2pm 1.1
Low
3pm 0.6
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 Wednesday, December 31st in Hillsborough, 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 0.3
Low
11am 0.2
Low
12pm 0.2
Low
1pm 0.2
Low
2pm 0.2
Low
3pm 0.1
Low
4pm 0
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 Thursday, January 1st in Hillsborough, 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 0.5
Low
10am 1.2
Low
11am 1.8
Low
12pm 1.9
Low
1pm 1.2
Low
2pm 0.6
Low
3pm 0.3
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 Friday, January 2nd in Hillsborough, CA is below.

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