Toronto weather in December
In December, Toronto has an average high of 2 °C36 °F and an average low of −2 °C28 °F, with about 63 mm2.5 in of precipitation. It is the 10th warmest month of the year and ranks 8th for precipitation.
How December compares with other months
Compared with November, December is 4.9 °C8.8 °F cooler on average. Compared with January, December is 3.2 °C5.7 °F warmer on average and wetter by 9 mm0.3 in. Daylight lasts about 8.9 hours around the middle of the month. Average relative humidity is 84% and the average cloud amount 81%.
Is December a good time to visit Toronto?
December is not among the most comfortable months by our comfort score: it is cool (average high 2 °C36 °F), nights are cold (average low −2 °C28 °F) and it is fairly wet (63 mm2.5 in). The most comfortable months in Toronto are June–September.
What to wear in December
For Toronto in December, pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
December in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Toronto | 236 | −228 | 632.5 |
| Markham | 133 | −522 | 602.4 |
| Brampton | 134 | −622 | 552.2 |
| Ajax | 134 | −524 | 622.4 |
| Oshawa | 134 | −523 | 622.4 |
| St. Catharines | 337 | −229 | 702.8 |
| Guelph | 032 | −620 | 552.2 |
| Barrie | 032 | −522 | 512.0 |
| Brantford | 236 | −425 | 562.2 |
Nearby places that are more than 1 °C1.8 °F cooler: Markham, Brampton, Ajax and Oshawa.
Other months in Toronto
- January−1 °C31 °F / −5 °C22 °F
- February−1 °C31 °F / −6 °C22 °F
- March3 °C38 °F / −3 °C27 °F
- April8 °C47 °F / 2 °C35 °F
- May14 °C58 °F / 7 °C45 °F
- June21 °C69 °F / 14 °C57 °F
- July25 °C76 °F / 18 °C64 °F
- August24 °C76 °F / 18 °C65 °F
- September21 °C69 °F / 15 °C59 °F
- October14 °C57 °F / 9 °C47 °F
- November7 °C45 °F / 3 °C37 °F
- December2 °C36 °F / −2 °C28 °F
Frequently asked questions
How warm is Toronto in December?
In December the average high in Toronto is 2 °C (36 °F) and the average low is -2 °C (28 °F).
Does it rain a lot in Toronto in December?
On average about 63 mm (2.5 in) of precipitation falls in December; it ranks 8th of the 12 months.
Is December the warmest month in Toronto?
No. The warmest month in Toronto is July, with an average high of 25 °C (76 °F). The coldest month is February, with an average low of -6 °C (22 °F).
How long is the day in Toronto in December?
In the middle of December the day in Toronto lasts about 8.9 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Toronto in December?
The average relative humidity in December is about 84%. This is a long-term average for the whole day.
How cloudy is Toronto in December?
On average about 81% of the sky is covered by cloud in December. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 99 m, while Toronto lies at about 161 m. Temperatures on this page were therefore adjusted by −0.4 °C0.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.