Montréal weather in December
In December, Montréal has an average high of −4 °C26 °F and an average low of −12 °C10 °F, with about 98 mm3.9 in of precipitation. It is the 10th warmest month of the year and ranks 3rd for precipitation.
How December compares with other months
Compared with November, December is 8.1 °C14.5 °F cooler on average and wetter by 18 mm0.7 in. Compared with January, December is 4.6 °C8.3 °F warmer on average and wetter by 26 mm1.0 in. Daylight lasts about 8.7 hours around the middle of the month. Average relative humidity is 91% and the average cloud amount 76%.
Is December a good time to visit Montréal?
December is not among the most comfortable months by our comfort score: it is cool (average high −4 °C26 °F), nights are cold (average low −12 °C10 °F) and it is fairly wet (98 mm3.9 in). The most comfortable months in Montréal are June–September.
What to wear in December
For Montréal in December, pack a winter coat, hat, gloves and warm, non-slip boots and an umbrella or light rain jacket.
December in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Montréal | −426 | −1210 | 983.9 |
| Trois-Rivières | −425 | −1210 | 933.7 |
| Sherbrooke | −228 | −1014 | 923.6 |
| Ottawa | −228 | −1113 | 803.2 |
| Québec | −326 | −1211 | 953.7 |
| Kingston | 236 | −327 | 863.4 |
| Albany | 337 | −524 | 1034.0 |
| Manchester | 337 | −523 | 1114.4 |
| Syracuse | 235 | −424 | 933.7 |
Nearby places that are more than 1 °C1.8 °F warmer in December: Sherbrooke, Ottawa, Kingston and Albany.
Other months in Montréal
- January−7 °C19 °F / −18 °C0 °F
- February−5 °C23 °F / −16 °C3 °F
- March0 °C33 °F / −9 °C15 °F
- April9 °C49 °F / −1 °C31 °F
- May17 °C63 °F / 7 °C44 °F
- June22 °C72 °F / 13 °C55 °F
- July25 °C78 °F / 16 °C60 °F
- August25 °C77 °F / 15 °C59 °F
- September21 °C70 °F / 10 °C50 °F
- October12 °C54 °F / 3 °C38 °F
- November4 °C39 °F / −4 °C26 °F
- December−4 °C26 °F / −12 °C10 °F
Frequently asked questions
How warm is Montréal in December?
In December the average high in Montréal is -4 °C (26 °F) and the average low is -12 °C (10 °F).
Does it rain a lot in Montréal in December?
On average about 98 mm (3.9 in) of precipitation falls in December; it ranks 3rd of the 12 months.
Is December the warmest month in Montréal?
No. The warmest month in Montréal is July, with an average high of 25 °C (78 °F). The coldest month is January, with an average low of -18 °C (0 °F).
How long is the day in Montréal in December?
In the middle of December the day in Montréal lasts about 8.7 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Montréal in December?
The average relative humidity in December is about 91%. This is a long-term average for the whole day.
How cloudy is Montréal in December?
On average about 76% 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 38 m, while Montréal lies at about 216 m. Temperatures on this page were therefore adjusted by −1.2 °C2.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.