UV Index
UV Index
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Today's UV index in Markham, Canada 
will be up to 1.4, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.
Today, the UV index suggests low sun danger (0-2) in Markham, reaching up to 1.4. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
Read more here about the climate and sun exposure in and around Markham.
The UV index in Markham, Canada typically ranges from low to high. During the summer months, from June to August, the UV index is usually high, ranging from 6 to 9. It is important to wear sunscreen, protective clothing, and sunglasses to reduce the risk of sunburn and skin damage. In the other seasons, the UV index is generally lower, ranging from 1 to 6, but it is still essential to protect yourself when spending time outdoors.
Markham experiences four distinct seasons: spring, summer, fall, and winter. In spring (March to May), temperatures gradually rise, ranging from 5 °C to 20 °C (41 °F to 68 °F), with occasional rain showers. Summer (June to August) brings warm and humid weather, with temperatures averaging between 20 °C and 30 °C (68 °F to 86 °F). Fall (September to November) is mild and pleasant, with temperatures ranging from 10 °C to 20 °C (50 °F to 68 °F) and vibrant foliage. Winter (December to February) is cold, with temperatures ranging from -10 °C to -5 °C (14 °F to 23 °F), and occasional snowfall.
Markham, located within the Ontario region of Canada, has similar weather patterns to its surroundings. Being in close proximity to Lake Ontario, it experiences a relatively milder climate compared to inland areas. However, it still receives ample sunshine throughout the year, making it necessary to protect yourself from harmful UV rays. It is advisable to monitor the UV index regularly and take appropriate measures to stay safe under the sun, regardless of the season.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Markham. It's designed to provide you with a better understanding of the yearly weather and sun exposure.