Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Corvallis, United States, where exposure to UV radiation can vary significantly throughout the day. With peak UV levels reaching as high as 10, especially during the summer months, being aware of these numbers can help you prevent sunburn and protect your skin health. Corvallis, situated in a Dfb climate zone, is known for its distinct seasons, which can influence UV exposure risks. By staying informed about the UV Index, you can enjoy outdoor activities while minimizing the potential long-term effects of harmful UV rays.
As the sun rises, the UV Index starts off low, hitting just 1 by 07:00 and maintaining that level through 08:00. However, as the morning progresses, anticipation builds with a steady climb to 3 by 09:00 and peaking at a noteworthy 5 by 10:00. The intensity escalates sharply, reaching a maximum of 10 between 13:00 and 14:00, indicating a significant risk for unprotected skin. Gradually, the UV Index begins to decline, dropping back to 9 at 15:00 and easing down to 5, 3, and finally 2 as the day winds down through 17:00 to 19:00. A day to remember for sun seekers, but remember to apply that sunscreen during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
As the seasons change, the UV Index presents notable fluctuations that can significantly impact skin health. January and February exhibit a moderate UV Index of 3 and 4, respectively, allowing for a burn time of 30 minutes. However, as spring approaches, March sees a jump to a high UV Index of 6 with a reduced burn time of 25 minutes. The high-risk months for UV exposure arise in late spring and summer, particularly from April to August, when the UV Index peaks at 10 in May through July, necessitating a short burn time of just 15 minutes due to the very high exposure category. Even in August and September, the levels remain concerning at 9 and 8; thus, it is essential for both visitors and residents to take precautions, such as using sunscreen, wearing protective clothing, and seeking shade during peak hours. As the year progresses towards fall and winter, UV levels drop significantly, with October refreshing a moderate Index of 5 and December a low Index of 2, allowing for longer burn times of 30 and 45 minutes, respectively. Always stay vigilant about UV levels to protect your skin year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Corvallis | 3 | 4 | 6 | 8 | 10 | 10 | 10 | 9 | 8 | 5 | 3 | 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 |