Toronto Weather in December

In December, Toronto averages a high of 2°C (36°F) and a low of -3°C (26°F), from 54 years of daily records (1971–2025).

2°C

Average high

36°F

-3°C

Average low

26°F

18°C

Record high

64°F · December 5, 2001

-23°C

Record low

-10°F · December 20, 2004

What December Is Like in Toronto

December in Toronto has become 1.9°C (3.4°F) warmer on average: the 2010–2024 average against 1970–1989.
5 of the 10 warmest Decembers on record in Toronto have come since 2010.
Snow falls on about 9.2 days in a typical December.
On average, 20 nights in December drop below freezing.

At least 1 mm of rain falls on 33% of December days, and the month averages 69 mm in total.

Average daytime high in Toronto, every December since 1971

Warmest: 2015 (7.6°C)Latest: 2024 (3.3°C)10-year averageLong-run average (2.2°C)

See the weather in Toronto on any December date, year by year.

Source: NOAA GHCN-Daily, Toronto (1971–2003); Toronto City (2002–2025). Averages cover 1971–2025. How we compute this