Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Friendship, United States, as it provides vital information about sun exposure throughout the day. With the region's Cfa climate, characterized by warm summers, knowing the UV levels can help you prevent sunburns and protect your skin health. From the mid-morning peak at 11:00 AM with a UV Index reaching an extreme 11, to the gradual decrease in the afternoon, staying informed allows you to enjoy outdoor activities safely while minimizing the risks associated with harmful ultraviolet rays.
The UV Index throughout the day follows a dynamic trajectory, peaking during midday hours. Early in the morning, at 7:00 AM, the index is a mere 1, indicating minimal risk. However, as the sun rises, the intensity escalates sharply, reaching 11 by 12:00 PM and 1:00 PM, signaling a high risk period for unprotected skin. By 3:00 PM, there's a noticeable decline to 8, and it continues to fall gently, arriving back at 1 by 7:00 PM. It’s crucial to stay protected during those peak hours, especially between 10:00 AM and 3:00 PM, when the sun's rays are the strongest.
| 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 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index varies significantly, with high-risk months occurring primarily from April to August, where the index reaches extreme levels of 10-11. During these months, the recommended burn time drastically decreases, dropping to as low as 10 minutes of unprotected sun exposure. Visitors and residents are advised to take extra precautions during these high UV Index periods by wearing protective clothing, applying sunscreen with a high SPF, and seeking shade during peak hours (10 AM to 4 PM). As the UV Index returns to moderate levels in January, November, and December, the risk of skin damage decreases, but sun safety remains essential 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 |
| Friendship | 3 | 6 | 7 | 10 | 11 | 11 | 11 | 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 |