Toronto averages about 830 mm (roughly 33 inches) of precipitation a year, spread fairly evenly across the seasons between rain and, in winter, a mix of rain and snow off Lake Ontario. Summer brings the highest risk of sudden, intense thunderstorms, some capable of producing damaging wind and hail as warm, humid air moves up from the Great Lakes and collides with cooler fronts. Because the city’s storm sewer system dates back many decades in older neighborhoods, short bursts of heavy rain can overwhelm drainage faster than the total rainfall would suggest, leading to localized flooding on major roads and underpasses. Lake-effect weather also means conditions can shift quickly near the shoreline compared with areas further inland. Environment Canada’s weather radar network covers the Greater Toronto Area, giving residents a practical way to see an approaching squall line or lake-effect band before it reaches downtown.
Learn more: How Does Rain Radar Work? · Open the full Rain Map
Frequently Asked Questions
Is it raining in Toronto right now?
The live radar map above shows precipitation over Toronto, Ontario in real time. Blue shades indicate light rain, while yellow, orange, and red mark heavier downpours. If no colored echoes appear over Toronto, no significant rain is currently being detected.
How often does the Toronto 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 Toronto?
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 Toronto or pass by.
Is this Toronto 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.