United States
UV Index in Michigan — Current UV Levels
Check the current UV index for 3 cities in Michigan. Select a city below for real-time UV data, hourly forecasts, and sun protection advice.
UV Index by City in Michigan
Sun Safety in Michigan
UV levels in Michigan vary by season, altitude, and proximity to water. The WHO recommends sun protection whenever UV reaches 3 or higher. Apply SPF 30+ before outdoor activities and reapply every 2 hours.
UV Index in Michigan: What to Know
Michigan has moderate UV that peaks in midsummer, with the Great Lakes adding reflected exposure on bright days.
Across Michigan, the UV index peaks in the four hours around solar noon (roughly noon to 3 PM local time). The World Health Organization recommends sun protection whenever the UV index reaches 3 or higher: apply broad-spectrum SPF 30 at UV 3–5, SPF 50 at UV 6–7, and SPF 50+ with reapplication every two hours at UV 8 and above. Check the live, hour-by-hour UV index for Ann Arbor, Detroit and Grand Rapids on the city pages above before heading outdoors.
Common Questions About UV in Michigan
When is the UV index highest in Michigan?
UV in Michigan is strongest between noon and 3 PM local time, and highest in the summer months when the sun sits highest in the sky. Check the hourly chart for Ann Arbor above to see today's exact peak.
Do I need sunscreen in Michigan?
Yes — whenever the UV index reaches 3 or higher, which in Michigan covers most of the daytime hours from spring through fall. Even on cloudy days, up to 80% of UV can reach the ground.
How accurate is this UV data for Michigan?
Our UV index for Michigan comes from Open-Meteo, which aggregates national weather-service models, and updates every 15 minutes. Levels follow the official WHO global solar UV index scale.