UV Index
UV Index
Today's UV index in Las Vegas, United States 
will be up to 11.6, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-20
UV index at 11.6 in Las Vegas means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Las Vegas is very high, especially during summer months, often reaching extreme levels above 10. This means strong ultraviolet rays from the sun can cause skin damage quickly.
Las Vegas has hot summers with temperatures often above 100°F (38°C) and mild winters. Rainfall is very low year-round, making it a dry desert climate with most rain falling in winter and brief summer storms.
Compared to other parts of the southwestern United States, Las Vegas is hotter and drier than cities like Phoenix and Los Angeles. Neighboring states like California and Arizona have more varied weather, while Las Vegas remains consistently sunny and arid.
See the UV index hour by hour for Las Vegas, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.