On this page, you can find the current UV Index and hourly 5 day UV Index forecast for San Bruno, San Mateo County, California (CA). The Ultraviolet Index forecast, which measures the radiation from the sun that reaches the Earth's surface is updated daily.
(Updated 15 minutes ago.)
As of 2:15 PM PDT, the UV Index in San Bruno, CA is 9.5 (Very High).
The UV Index is expected to fall
to 8.3 (still Very High) between 3:00 PM - 4:00 PM PDT today.
UV Index Data sourced from the NOAA.
As of 2:15 PM PDT today in San Bruno, CA, the UV Index is currently at its highest level for the day, 9.5, which is classified as very high risk. As the day progresses, the UV index is expected to fall as the sun sets.
It will return to high levels at 4:00 PM and then drop to low levels again from 6:00 PM onwards. As the day transitions into the night, the UV Index will drop back down to 0 at 8:00 PM.
| Time Range | UV Index | Risk |
|---|---|---|
| 6:00 AM - 10:00 AM (PDT) | 0 - 2.3 | Low |
| 10:00 AM - 11:00 AM | 4.3 | Moderate |
| 11:00 AM - 12:00 PM | 6.3 | High |
| 12:00 PM - 4:00 PM | 8.1 - 9.5 | Very High |
| 4:00 PM - 5:00 PM | 5.8 | High |
| 5:00 PM - 6:00 PM | 3.4 | Moderate |
| 6:00 PM - 12:00 AM | 0 - 1.6 | Low |
| Time Range | UV Index | Risk |
|---|---|---|
| 12:00 AM - 9:00 AM (PDT) | 0 - 1.2 | Low |
| 9:00 AM - 11:00 AM | 2.8 - 4.9 | Moderate |
| 11:00 AM - 12:00 PM | 6.9 | High |
| 12:00 PM - 4:00 PM | 7.7 - 9.2 | Very High |
| 4:00 PM - 5:00 PM | 5.5 | High |
| 5:00 PM - 6:00 PM | 3.3 | Moderate |
| 6:00 PM - 12:00 AM | 0 - 1.5 | Low |
| Time | UV Index | Risk |
|---|---|---|
| 2:00 PM - 3:00 PM (Now, PDT) | 9.5 | Very High |
| 3:00 PM - 4:00 PM | 8.3 | Very High |
| 4:00 PM - 5:00 PM | 5.8 | High |
| 5:00 PM - 6:00 PM | 3.4 | Moderate |
| 6:00 PM - 7:00 PM | 1.6 | Low |
| 7:00 PM - 8:00 PM | 0.5 | Low |
| 8:00 PM - 9:00 PM | 0 | Low |
| 9:00 PM - 10:00 PM | 0 | Low |
| 10:00 PM - 11:00 PM | 0 | Low |
| 11:00 PM - 12:00 AM | 0 | Low |