UV Index
UV Index
Today's UV index in Sudbury, Canada 
will be up to 6.6, 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: 2025-05-09
With Sudbury's UV index reaching 6.6, 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.
Sudbury's UV index varies seasonally, with low values in winter and higher values in summer, typically ranging from 0 to 7. The UV index peaks around June and July.
Sudbury has cold, snowy winters and warm, humid summers. Spring and fall are short and can be unpredictable, with temperatures gradually changing. Snow usually covers the ground from November to March.
Compared to southern parts of Canada and the U.S., Sudbury is colder in winter with more snow. Its summers are milder than those farther south. Neighboring Ontario areas have similar weather but may be a bit warmer or cooler depending on location.
See the UV index hour by hour for Sudbury, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.