Daytime highs, nighttime lows and the warmest cities across Canada this September.
Canada, experiences maximum daytime temperatures in September ranging from -5°C (23°F) in Alert to 24°C (75°F) in Osoyoos. Nighttime temperatures generally drop to 9°C (48°F) in Osoyoos and -11°C (12°F) in Alert. September is a summer month.
Explore the map below to discover average September temperatures at the top destinations in Canada. For a deeper dive, simply click on any destination dot.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Canada.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Drill down to September weather for any region in Canada.
Pick a city to see its September weather averages.
Average daytime highs in Canada during September reach about 22°C (72°F) in Toronto.
Nighttime temperatures in Toronto typically drop to around 15°C (59°F) in September.
Osoyoos tops the warmest city list in our database with average maximum daytime temperatures around 24°C (75°F) and a minimum nighttime temperature of around 9°C (48°F).
When looking through our records, we find that Alert stands out as the coolest city in Canada for the month of September. Daytime highs average -5°C (23°F) and it cools down to about -11°C (12°F) at night.
Toronto enjoys close to 195 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.
The water temperature averages approximately 20°C (68°F) in Montréal this month, so still a bit cool to swim, though some enjoy a chilly dive.
We have much more information about the climate in Canada.
Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.
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