Louisville UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index5.9
- Avg Clouds83%
- Max Temp30.9 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Louisville, United States 
will reach a high of 5.9 today. This means a moderate level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-16
Hourly Forecast Chart
Today's Safety Tips
The sun is a bit strong. Find some shade during midday. Wear a hat, sunglasses, and use SPF 30+ sunscreen if you'll be outside for a while.
Louisville's UV Index
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.
Weather Seasons
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.
Louisville's Climate
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.
Hourly UV Index Trend
See the UV index hour by hour for Louisville. When the level is high, it's smart to find some shade.
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