Toronto, Ontario weather in January

Averages from 2021–2025 (155 days of record).

Average high

31°F

Average low

20°F

Rainy days

~9 per month

Total precipitation

2.5 in

Warmest recorded

44°F

Coldest recorded

-9°F

Expect January days in Toronto, Ontario to top out around 31°F and cool to about 20°F overnight, with roughly 9 days of measurable rain across the month. In recent years January has ranged from -9°F to 44°F.