As of 11:59 AM AKDT on July 31, 2026, out of 3 cities in Petersburg Borough, AK in our database, 2 cities (67%) have a UV Index reading of Low, while 1 city (33%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Kupreanof, AK with a reading of 3.1.
Over the next 24 hours, the highest UV Index reading in Petersburg Borough, AK is expected to be 4.7 in Petersburg between 1:00 PM - 2:00 PM AKDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |