Last updated: June 2, 2025
In Anchorage, United States, understanding the UV Index is crucial for protecting your skin from harmful sun exposure. With varying UV levels throughout the day, being aware of these fluctuations can help prevent sunburn and maintain overall skin health. Anchorage's Dfc climate brings unique sunlight patterns, particularly in the summer months, and while the UV Index may not always reach extreme levels, afternoon spikes—such as a midday maximum of 6—can pose real risks. Staying informed about the UV Index empowers residents and visitors to enjoy the sun safely while minimizing potential harm from ultraviolet radiation.
As the day begins, the UV Index starts at a very low level of 1 at 07:00 and 08:00, urging early risers to enjoy the gentle sunlight safely. By 09:00, it climbs to 2, indicating a slight increase in UV exposure. As the hours progress, the sun's intensity peaks at 12:00 and 13:00, reaching a maximum of 5—perfect for those looking to soak up some rays but remember to apply sunscreen! The afternoon marks the highest UV risks, peaking at 14:00 with a UV index of 6, before gradually declining to 4 by 17:00. As evening approaches, the index decrements back down to 2 by 19:00, offering a safer environment for those who may be out and about. Stay sun-smart and enjoy the daylight hours wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
The UV Index experiences significant seasonal changes, with high-risk months identified from June to July, where the index peaks at 6 and 7, categorized as high exposure. During these months, the burn time decreases to just 25 minutes, emphasizing the need for protective measures. As spring approaches, particularly in March, the index rises from low to moderate levels (3 to 5), which means visitors should start to be vigilant about UV exposure. Conversely, from November to February, the UV Index remains low (1), allowing for more extended outdoor activities with minimal risk of sunburn—up to 45 minutes. Residents and visitors are advised to take appropriate sun protection measures such as wearing sunscreen, hats, and sunglasses, particularly during the high-risk summer months, while maintaining awareness of the UV levels year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Anchorage | 1 | 1 | 3 | 4 | 5 | 6 | 7 | 5 | 4 | 2 | 1 | 1 |
| Chicago UVI | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
| Brooklyn UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| New York City UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| Los Angeles UVI | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |