UV Index for San Mateo, CA

Current San Mateo UV Index

0 (Low)

Last Updated 31 minutes ago

Hourly San Mateo UV Index

The hourly San Mateo, CA UV Index forecast for Wednesday, April 16th, 2025.

5 Day Hourly San Mateo UV Index Forecast

Last Updated 15 hours ago

The UV index forecast for the next five days in San Mateo, CA has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in San Mateo over the next five days will be 7 on Friday, April 18th at 1:00 pm.

The UV index forecast for Wednesday, April 16th in San Mateo, CA is below.

Time UV Index Risk
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.5
Low
9am 1.4
Low
10am 2.8
Low
11am 4.4
Moderate
12pm 5.6
Moderate
1pm 6.5
High
2pm 6.1
High
3pm 4.8
Moderate
4pm 3.4
Moderate
5pm 1.8
Low
6pm 0.7
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, April 17th in San Mateo, 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 0.2
Low
9am 0.8
Low
10am 1.6
Low
11am 2.6
Low
12pm 3.6
Moderate
1pm 4.4
Moderate
2pm 4.5
Moderate
3pm 3.9
Moderate
4pm 2.5
Low
5pm 1.4
Low
6pm 0.5
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, April 18th in San Mateo, 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 0.5
Low
9am 1.5
Low
10am 3.1
Moderate
11am 4.9
Moderate
12pm 6.3
High
1pm 7
High
2pm 6.7
High
3pm 5.5
Moderate
4pm 3.7
Moderate
5pm 2
Low
6pm 0.8
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, April 19th in San Mateo, 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