UV Index
Markham UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index6.8
- Avg Clouds80%
- Max Temp21.4 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Markham, Canada 
will reach a high of 6.8 today. This means a high level of sun exposure. See our tips below to stay safe!
Last checked: 2025-08-19
Hourly Forecast Chart
Today's Safety Tips
Be careful! The sun's rays are strong. Try to stay in the shade between 10 a.m. and 4 p.m. Wear a hat, sunglasses, and reapply SPF 30+ sunscreen every 2 hours.
Markham's UV Index
The UV index in Markham, Canada, varies throughout the year, typically reaching moderate levels in spring and fall and higher levels during summer months. In winter, the UV index is low due to less sunlight. The city experiences four distinct seasons: cold, snowy winters; warm, humid summers; and mild, often rainy spring and autumn. Snowfall is common in winter, while summer can bring thunderstorms. Daylight hours change significantly, with longer days in summer and shorter in winter. Markham's weather is influenced by its location in southern Ontario, near Lake Ontario. Compared to other parts of Canada, Markham has milder winters than northern regions but colder than coastal areas. It experiences more humidity and precipitation than western provinces. Neighboring cities like Toronto have very similar weather patterns due to their proximity.
Hourly UV Index Trend
See the UV index hour by hour for Markham. When the level is high, it's smart to find some shade.
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