UV Index
UV Index
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Today's UV index in Markham, Canada 
will be up to 5, 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 5 in Markham, 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 Markham, Canada can reach high levels during the summer months, with a maximum index of 9. It is important to protect your skin during these times.
Markham experiences four distinct seasons throughout the year. Winters are cold and snowy, with temperatures often dropping below freezing. Spring brings milder temperatures and blooming flowers. Summers are warm and sunny, with occasional heatwaves. Autumn sees the changing of leaves and cooler temperatures.
Compared to its region, Markham has milder winters than other parts of Canada due to its southern location. However, it still experiences colder temperatures than neighboring countries such as the United States. Summers in Markham are also typically cooler than those in the southern United States, but can still reach high temperatures.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Markham. It's designed to provide you with a better understanding of the yearly weather and sun exposure.