Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Grand Haven, Michigan, as it directly impacts your health and skin protection strategies. High levels of ultraviolet radiation can lead to sunburn and increase the risk of long-term skin damage, making it essential to know the day's UV levels. With a climate zone classified as Dfb, Grand Haven experiences varied UV exposure throughout the year; particularly during the summer months, when UV levels can peak at intense levels of 9 to 10 around midday. Staying informed about the UV Index can help you enjoy the beautiful beaches and outdoor activities Grand Haven offers while protecting your skin from harmful effects.
As the sun rises, the UV Index begins at a gentle 1 at 07:00 and 08:00, indicating minimal risk for sun exposure. However, by 09:00, intensity picks up to 3, and a notable climb ensues as the morning progresses. At 10:00, it reaches 4, and by 11:00, the UV Index skyrockets to 7, signaling the need for sun protection. Midday brings the peak hours—by 12:00 and 13:00, it hits a sizzling 9 and a maximum of 10, posing a significant risk of harm from unprotected sun exposure. As the day winds down, the UV Index begins to gracefully decline: 9 at 15:00, followed by 7 at 16:00, 5 at 17:00, and finally settling at 3 by 18:00. The sun's fading rays continue to cast a softer light until it drops to 2 by 19:00, wrapping up a day where awareness of UV exposure was key to safe enjoyment of the outdoors.
| 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 | 4 | 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, so do UV levels, highlighting periods of higher risk for sun exposure. From January to March, the UV Index remains low to moderate, with February seeing an increase. April to August marks the peak high-risk months, featuring very high UV levels, particularly in June and July, where the burn time drops to a remarkable 15 minutes. September transitions into a high UV category, while October to December see a gradual decline, returning to low risk by year's end. To protect yourself, especially during the high UV months of April through August, it is crucial to wear sunscreen, protective clothing, and seek shade to minimize exposure. Be particularly vigilant during the summer months when burn time is significantly reduced.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grand Haven | 2 | 4 | 5 | 8 | 9 | 10 | 10 | 9 | 7 | 5 | 3 | 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 |