UV Index
UV Index
Today's UV index in Louisville, United States 
will be up to 8.7, indicating a very high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-11
With a UV index of 8.7 in Louisville, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
Louisville's UV index varies throughout the year, typically ranging from low to moderate in winter and spring, increasing to high levels in summer months, and then decreasing again in autumn. The UV index peaks in June and July when the sun is strongest.
Louisville experiences four distinct seasons: cold winters with occasional snow, warm and humid summers, mild springs with blooming plants, and cool autumns with colorful leaves. Rainfall is spread fairly evenly, with spring and summer often seeing thunderstorms.
Compared to the wider Midwest region, Louisville has milder winters and more humidity. Neighboring states like Indiana and Kentucky share similar weather patterns, but Louisville tends to have slightly warmer temperatures and more rain than areas farther north or west.
See the UV index hour by hour for Louisville, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.