UV Index
UV Index
Today's UV index in Toronto, Canada 
will be up to 7.4, indicating a 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: 2025-06-01
With Toronto's UV index reaching 7.4, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.
Toronto's UV index varies seasonally, reaching its highest levels in late spring and summer, typically between 6 and 8, indicating moderate to high ultraviolet radiation. Winter months have low UV levels around 1 or 2. Toronto experiences four distinct seasons: cold, snowy winters; warm, humid summers; mild springs with increasing sunshine; and cool, crisp autumns with colorful foliage. Snow is common from December to March, while summer temperatures often reach the mid-20s Celsius (70s Fahrenheit). Compared to other Canadian cities, Toronto has milder winters than cities further north like Ottawa but colder winters than some coastal areas. Its summers are warmer and more humid than Vancouver's, and it generally experiences less extreme weather than central US cities at similar latitudes.
See the UV index hour by hour for Toronto, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.