6 (High)
Last Updated 37 minutes ago
The hourly Altadena, CA UV Index forecast for Monday, July 14th, 2025.
Last Updated 23 hours ago
The UV index forecast for the next five days in Altadena, CA has 1 day reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Altadena over the next five days will be 11.1 on Wednesday, July 16th at 1:00 pm.
The UV index forecast for Monday, July 14th in Altadena, CA is below.
Time | UV Index | Risk |
---|---|---|
11am | 8.7 |
Very High |
12pm | 10.5 |
Very High |
1pm | 10.6 |
Very High |
2pm | 9.8 |
Very High |
3pm | 7.7 |
High |
4pm | 5.1 |
Moderate |
5pm | 2.8 |
Low |
6pm | 1.1 |
Low |
7pm | 0.3 |
Low |
8pm | 0 |
Low |
9pm | 0 |
Low |
10pm | 0 |
Low |
11pm | 0 |
Low |
The UV index forecast for Tuesday, July 15th in Altadena, 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 | 0.4 |
Low |
8am | 1.4 |
Low |
9am | 3.4 |
Moderate |
10am | 6.1 |
High |
11am | 8.8 |
Very High |
12pm | 10.6 |
Very High |
1pm | 10.8 |
Very High |
2pm | 10 |
Very High |
3pm | 8 |
Very High |
4pm | 5.2 |
Moderate |
5pm | 2.8 |
Low |
6pm | 1.1 |
Low |
7pm | 0.2 |
Low |
8pm | 0 |
Low |
9pm | 0 |
Low |
10pm | 0 |
Low |
11pm | 0 |
Low |
The UV index forecast for Wednesday, July 16th in Altadena, 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 | 0.4 |
Low |
8am | 1.4 |
Low |
9am | 3.4 |
Moderate |
10am | 6 |
High |
11am | 8.8 |
Very High |
12pm | 10.8 |
Very High |
1pm | 11.1 |
Extreme |
2pm | 9.9 |
Very High |
3pm | 7.9 |
High |
4pm | 5.4 |
Moderate |
5pm | 2.8 |
Low |
6pm | 1.2 |
Low |
7pm | 0.3 |
Low |
8pm | 0 |
Low |
9pm | 0 |
Low |
10pm | 0 |
Low |
11pm | 0 |
Low |
The UV index forecast for Thursday, July 17th in Altadena, 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 |