Toronto Weather in September
Canada · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Toronto sees average temperatures ranging from a low of 14.0°C (57.2°F) to a high of 21.9°C (71.4°F), with a mean of 17.9°C (64.2°F). Compared to the annual average of 9.6°C (49.3°F), this month is 8.3°C warmer than the yearly norm. Precipitation averages 67.1mm, making it approximately 8.0mm drier than the monthly average of 75.0mm. The city receives an average of 10.0 hours of sunshine per day during September, with relative humidity averaging 73.5%. Wind speeds reach an average maximum of 19.0 km/h. For travelers, this month offers a temperature experience in Toronto, with drier-than-average conditions compared to the rest of the year.
There's something about Toronto in early October that feels borrowed — the city knows winter is coming and grips autumn tightly. I walked the Distillery District one Thanksgiving weekend: 14°C, maple leaves crackling underfoot, cafés serving pumpkin everything. Winter (December-March) is when Toronto leans into its indoor culture: underground PATH system, hockey arenas, the AGO. Summer (June-August) brings the city outdoors — 25°C, patio culture, festivals on the islands. I find May the most underrated: 15°C, cherry blossoms in High Park, and locals who survived winter emerging with gratitude. Each season has its own Toronto.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 21.6°C (70.9°F) | 17.9°C (64.2°F) | 11.8°C (53.2°F) |
| Rainfall | 71.4mm | 67.1mm | 75.6mm |
| Sunshine | 11.5 hrs | 10.0 hrs | 7.2 hrs |
| Humidity | 72.8% | 73.5% | 74.4% |
| Wind | 18.8 km/h | 19.0 km/h | 21.2 km/h |
| Rainy Days | 15.6 | 13.4 | 16.4 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Toronto in September, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Toronto in September?
The average temperature in Toronto during September ranges from 14.0°C (57.2°F) to 21.9°C (71.4°F), with a mean of 17.9°C (64.2°F).
How much does it rain in Toronto in September?
Toronto receives an average of 67.1mm of precipitation in September, spread across approximately 13.4 rainy days.
What should I pack for Toronto in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is September a good time to visit Toronto?
September is a good time to visit Toronto, with comfortable temperatures and manageable rainfall.
Other Months for Toronto
Cities with Similar September Climate (Humid Continental)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 43.65°, -79.38°. Timezone: America/Toronto. Last updated: 2026-07-30.