Markham sits in the Great Lakes basin in Ontario, where a humid continental climate brings precipitation fairly evenly through the year, with the biggest flood risks coming from spring snowmelt and intense summer thunderstorms.
North of Toronto, the city’s rapid suburban growth has increased stormwater runoff during intense summer storms. Lake-effect weather patterns and the basin’s many rivers mean local flooding can develop quickly during a strong spring melt or a slow-moving summer storm, and Environment Canada’s radar network is a key tool for tracking both. Learn more: Flash Flood Warning Signs on Radar · Open the full Rain Map
Frequently Asked Questions
Is it raining in Markham right now?
The live radar map above shows precipitation over Markham, Ontario in real time. Blue shades indicate light rain, while yellow, orange, and red mark heavier downpours. If no colored echoes appear over Markham, no significant rain is currently being detected.
How often does the Markham rain radar update?
The radar refreshes continuously, typically every few minutes, so the map reflects current conditions rather than an hours-old forecast. Press play to animate the most recent frames.
Can I see if a storm is heading toward Markham?
Yes. Press play on the radar to animate the last few hours of rainfall and watch which way rain cells over Ontario are moving – the clearest way to judge whether a shower will reach Markham or pass by.
Is this Markham rain radar free to use?
Yes, completely free – no account, app download, or sign-up required. It works in any browser on desktop and mobile.