UV Index
UV Index
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Today's UV index in Toronto, Canada 
will be up to 4.4, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4.4 in Toronto, 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.
The UV index in Toronto can reach high levels during the summer months, with a maximum index of 9 or higher on extremely sunny days. In the winter, the UV index is much lower, often dropping below 2.
Toronto experiences four distinct seasons throughout the year. Spring arrives in April, bringing mild temperatures and blooming flowers. Summers are warm with high temperatures typically in the 20s (°C), and occasional heatwaves can push temperatures into the 30s. Autumn showcases beautiful foliage and falling temperatures, and winter brings cold weather, snow, and temperatures that can drop below freezing.
Compared to its region and neighboring countries, Toronto's weather is relatively moderate. The city has a more temperate climate than many areas of Canada, thanks to its southern location and proximity to water. Meanwhile, cities in the northern United States, such as Minneapolis, often experience harsher winter conditions than Toronto does.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Toronto. It's designed to provide you with a better understanding of the yearly weather and sun exposure.