UV Index
UV Index
Today's UV index in Montréal, Canada 
will be up to 5.9, indicating a moderate level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-10
With a UV index reaching up to 5.9 in Montréal, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
Montréal's UV index varies from low in winter to moderate or high in summer, peaking around 7 to 8 in June and July. The highest UV days occur in late spring and early summer.
Montréal has four distinct seasons: cold, snowy winters from December to February; mild springs in March to May; warm, humid summers in June to August; and cool, colorful autumns in September to November with temperatures gradually dropping.
Compared to other parts of Canada, Montréal's climate is milder than northern regions but colder than the U.S. northeast. It is more humid and experiences more snow than cities like Toronto, but less than Quebec City or the Atlantic provinces.
See the UV index hour by hour for Montréal, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.