Last updated: July 2, 2025
Understanding the UV Index in Manchester-by-the-Sea is critical for protecting your skin and enhancing overall health. With peak UV levels reaching up to 9 during midday hours, being aware of these fluctuations can help you prevent sunburn and minimize long-term skin damage. Nestled in a Dfb climate zone, Manchester-by-the-Sea experiences a range of weather conditions that can influence UV exposure. By staying informed about the UV Index, residents and visitors alike can enjoy the sun safely, making the most of the beautiful coastal environment while safeguarding their skin's health.
The UV Index reveals a dynamic pattern throughout the day, starting at a mild 1 at 07:00 and steadily rising as the sun reaches its peak. By 10:00, it escalates to a moderate 6, reaching 8 at 11:00 and peaking at an intense 9 from 12:00 to 13:00. This period signifies the greatest caution for sun exposure, making it essential to seek shade and wear protective clothing. As the afternoon unfolds, the index begins to dip, dropping to 8 at 14:00, then declining further to 7 by 15:00, and tapering down to 1 by 19:00. Overall, it’s a day that encourages sun safety awareness, particularly during the midday hours when UV radiation is at its 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 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | 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 fluctuate significantly, indicating varying risks for sun exposure. January and December maintain a low UV Index of 2, allowing for safer outdoor activities with longer burn times of 45 minutes. As we transition into February and March, the index rises to 4 and 5, respectively, marking a moderate exposure risk with burn times dropping to 30 minutes. The high-risk months commence in April with a UV Index of 8 and peak in May and June at 9 and 10—all categorized as very high—where the burn time significantly decreases to just 15 minutes. This elevated risk persists into July and August before tapering to 7 and 6 in September and October, labeled as high, with burn times extending to 25 minutes. As November returns to moderate levels with an index of 4, residents and visitors are urged to apply sunscreen, wear protective clothing, and seek shade, especially during the peak months from April to August, to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manchester-by-the-Sea | 2 | 4 | 5 | 8 | 9 | 10 | 9 | 9 | 7 | 6 | 4 | 2 |
| 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 |