Monthly climate guide
Toronto weather in September
September in Toronto is typically warm, with average daytime highs around 22°C (71°F) and night-time lows near 16°C (61°F). The month usually brings about 62 mm of rain (some rain) and is often cloudy. Daytime highs are 3°C cooler than August and 7°C warmer than October.
What stands out in September
- Toronto is usually about 2°C cooler than Hamilton, 60 km away, in September.
- September brings early autumn to Toronto.
- September is Toronto's third warmest month.
- Temperatures are falling — expect highs around 7°C lower by October.
Avg high
22°C
71°F
Avg low
16°C
61°F
Rainfall
62 mm
some rain
Humidity
73%
relative
Sky
62%
cloud · often cloudy
Toronto weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 0°C / 32°F | -5°C / 23°F | 57 mm | 84% | 81% |
| February | 0°C / 32°F | -5°C / 22°F | 48 mm | 84% | 80% |
| March | 4°C / 38°F | -2°C / 28°F | 49 mm | 80% | 74% |
| April | 8°C / 47°F | 2°C / 36°F | 74 mm | 79% | 77% |
| May | 16°C / 60°F | 8°C / 47°F | 67 mm | 79% | 75% |
| June | 21°C / 70°F | 14°C / 58°F | 76 mm | 75% | 67% |
| July | 26°C / 78°F | 20°C / 67°F | 64 mm | 71% | 63% |
| August | 25°C / 77°F | 19°C / 67°F | 59 mm | 72% | 62% |
| September | 22°C / 71°F | 16°C / 61°F | 62 mm | 73% | 62% |
| October | 15°C / 59°F | 10°C / 50°F | 78 mm | 77% | 74% |
| November | 8°C / 46°F | 3°C / 38°F | 58 mm | 79% | 74% |
| December | 3°C / 38°F | -1°C / 31°F | 56 mm | 83% | 81% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A small travel umbrella, just in case
Is September a good time to visit Toronto?
Our Toronto guide recommends: May to September for warm weather, or September to October for autumn colour.
Toronto winters are genuinely cold — if visiting between December and March, plan for well below freezing and use the city's indoor PATH walkway system downtown.
Best time to visit Toronto →Other Canada cities in September
Cite or embed this data
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Toronto weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/canada/toronto/september
<a href="https://weathercompare.eu/weather/canada/toronto/september">Toronto weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/canada/toronto" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Toronto weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/canada/toronto/september">Toronto weather in September</a> – WeatherCompare</p>
Toronto in September: quick answers
Is September a good time to visit Toronto?
Yes. September is one of the best months for Toronto, with highs around 22°C and about 62 mm of rain.
How warm is Toronto in September?
Average highs are about 22°C (71°F) and average lows about 16°C (61°F), based on 10 years of daily data.
Does it rain a lot in Toronto in September?
Toronto typically gets around 62 mm of rain in September — some rain.
When is the best time to visit Toronto?
May to September for warm weather, or September to October for autumn colour.
Figures are long-term averages for the area around Toronto (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.