UV Index for Union City, CA

Current Union City UV Index

0 (Low)

Last Updated 14 minutes ago

Hourly Union City UV Index

The hourly Union City, CA UV Index forecast for Saturday, October 25th, 2025.

5 Day Hourly Union City UV Index Forecast

Last Updated 11 hours ago

The UV index forecast for the next five days in Union City, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Union City over the next five days will be 4.5 on Monday, October 27th at 1:00 pm.

The UV index forecast for Saturday, October 25th in Union City, CA is below.

Time UV Index Risk
11pm 0
Low

The UV index forecast for Sunday, October 26th in Union City, 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 2.1
Low
12pm 3.6
Moderate
1pm 1.4
Low
2pm 2.6
Low
3pm 1.7
Low
4pm 1.1
Low
5pm 0.2
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, October 27th in Union City, 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 1.3
Low
11am 2.6
Low
12pm 3.9
Moderate
1pm 4.5
Moderate
2pm 4.2
Moderate
3pm 3.1
Moderate
4pm 1.8
Low
5pm 0.6
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, October 28th in Union City, 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 1.3
Low
11am 2.6
Low
12pm 3.8
Moderate
1pm 4.4
Moderate
2pm 4
Moderate
3pm 3
Moderate
4pm 1.7
Low
5pm 0.6
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, October 29th in Union City, 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