Last updated: July 2, 2025
In Clarkson, United States, staying informed about the UV Index is crucial for protecting your skin and overall health. The intensity of ultraviolet radiation can lead to sunburn, premature aging, and an increased risk of skin cancer, making it essential to understand daily UV levels. With a Cfa climate, Clarkson experiences varied UV exposure throughout the day, with the index peaking at 10 during midday—indicating a high risk of harm from unprotected sun exposure. By keeping an eye on the UV Index, you can take proactive measures to enjoy the outdoors safely while safeguarding your skin health.
The UV Index throughout the day presents a clear escalation and decline in sun exposure risk. Starting at a mild level 1 at 7:00 AM, it gradually climbs to a notable level 10 by noon, indicating peak midday sunlight intensity. The zenith occurs between 12:00 PM and 1:00 PM, where the index remains at 10, necessitating protective measures against harmful UV rays. As the afternoon progresses, the UV Index begins to taper off, dipping to level 7 by 3:00 PM and eventually returning to level 1 by 7:00 PM. To ensure skin health and safety, sun protection is essential during those high-risk hours around midday!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV index levels display significant seasonal variation, with notable peaks during the spring and summer months. From January (UV Index 3) to March (UV Index 7), exposure remains moderate to high, but by April and May (UV Index 10), it escalates to a very high category, necessitating increased sun protection. The most critical periods, with an extreme UV index of 11, occur in June, reminding visitors and residents to exercise extreme caution and limit sun exposure to just 10 minutes. This trend continues into July and August with very high levels, tapering off slightly in September (UV Index 9), before returning to high levels in October (UV Index 7). Residents and visitors should prioritize sun safety during the high-risk months of April to September, using sunscreen, wearing protective clothing, and seeking shade to minimize UV exposure. In contrast, November and December see a welcome decrease with a moderate UV index, allowing for more comfortable outdoor activities.
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 |
| Clarkson | 3 | 6 | 7 | 10 | 10 | 11 | 10 | 10 | 9 | 7 | 5 | 3 |
| 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 |