UV Index
UV Index
Today's UV index in Boise, United States 
will be up to 8.5, 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: 2025-05-09
With a UV index of 8.5 in Boise, 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.
Boise's UV index varies from low in winter to moderate and sometimes high in summer, peaking around midday in July. Seasonal patterns include cold, snowy winters and hot, dry summers with occasional thunderstorms. Compared to the nearby Pacific Northwest, Boise is drier and sunnier, with warmer summers than cities like Seattle but less humid than places further east, like Denver.
See the UV index hour by hour for Boise, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.