December Weather in Montreal, Canada

Last updated: April 22, 2025

Montreal in December presents a captivating winter landscape, with temperatures ranging from a brisk -26°C (-15°F) to a mild 14°C (57°F), landing an average of -5°C (24°F). Visitors can expect an average precipitation of 88 mm (3.5 in), spread across approximately 12 days, contributing to the city's enchanting snowy scenery. Paired with a high humidity level of 89%, December in Montreal envelops residents and tourists alike in a chilly yet vibrant atmosphere, perfect for enjoying festive activities and the charm of the holiday season.

December Temperature in Montreal

In December, Montreal embraces the heart of winter, showcasing a dramatic drop in temperatures. With minimums reaching a biting -26°C (-15°F) and an average hovering around -5°C (24°F), residents and visitors alike must bundle up against the chill. Despite the frigid conditions, daytime highs can still surprise, peaking at a milder 14°C (57°F), reminding us of the city's unique climate fluctuations. As the month progresses, the stark contrast between the icy lows and slightly warmer afternoons paints a quintessential wintry scene, inviting outdoor enthusiasts to enjoy the vibrant holiday atmosphere wrapped in a blanket of snow.

December Weather in Montreal: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Montreal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec171929435766727062503524
Data source: Temperature data for Montreal generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Montreal

In December, Montreal experiences consistent precipitation, totaling about 88 mm (3.5 in) across approximately 12 days of the month. This marks a slight decline from the wetter conditions of the preceding months, such as October and November, which brought 139 mm and 118 mm respectively. Despite the decrease, December's precipitation remains relatively stable compared to the earlier winter months of January and February, which receive 84 mm and 82 mm respectively. This trend reflects the onset of winter, as the city transitions to colder temperatures and the likelihood of snowfall increases, creating a picturesque yet sometimes challenging environment for residents.

December Precipitation Trends in Montreal

The chart displays monthly precipitation patterns in Montreal, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec848284121971041031097313911888
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Montreal

In Montreal, December ushers in a notable increase in humidity, settling at 89% as the year draws to a close. This marks a slight rise from the previous month’s 88%, reinforcing a trend of heightened moisture during the winter months. What’s particularly interesting is the contrast with the mid-year figures, where humidity dips to its lowest in June at 74%. As the seasons shift, Montreal experiences a gradual escalation in humidity, starting at 80% in May and peaking again toward the year's end, suggesting that residents can expect a damp, chilly finish to the year. This consistent resilience of humidity amidst winter's chill adds a unique layer to the city's vibrant climate, weaving a rich tapestry of atmospheric conditions.

December Average Humidity in Montreal

This chart illustrates the average monthly humidity levels in Montreal, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Montreal

In December, Montreal experiences a significant dip in UV exposure, with the UV Index dropping to a gentle 2, categorized as low. This means residents can enjoy outdoor activities with minimal risk of sunburn, as the burn time extends to about 45 minutes. This month serves as a stark contrast to the summer months, where indices soared to 9, indicating a very high level of UV radiation and necessitating protective measures. As the year wraps up, Montrealers can take solace in the decreased UV intensity, allowing for a more carefree winter season under the sun. For more detailed information, visit Montreal UV Index.

Maximum UV Index Levels in Montreal for December

The chart shows the monthly maximum UV Index (UVI) for Montreal in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Montreal December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Montreal

In Montreal, December marks a gentle transition as the city bids farewell to the vibrant autumn hues, welcoming the chill of winter with approximately 143 hours of sunshine. While this figure may seem modest compared to the sun-drenched days of July and June, which boast over 320 hours, it offers a notable contrast to the dimness of January and November. As the year draws to a close, residents and visitors alike can appreciate these fleeting rays of light, punctuating the long shadows and embracing the beauty of a snowy landscape. Interestingly, December's sunshine sets the stage for the gradual increase in daylight hours that follow, paving the way for brighter days ahead as the seasons change.

Monthly Sunshine Duration in Montreal: December Highlighted

The December sunshine duration represents the total number of hours Montreal experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec118h155h236h226h285h321h342h326h281h196h146h143h
Data source: Montreal December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Montreal During December

December in Montreal sees the likelihood of sunny weather plummet to just 29%, making it one of the least sunny months of the year. This trend follows a notable downward trajectory from the more hopeful September and November, both boasting a 41% to 45% chance of sun. As winter sets in, the sun shines less frequently, echoing the brand of chill that blankets the city. Interestingly, December's sun probability holds the same low rate as October, signaling a seasonal shift that leaves many longing for those warmer, sunlit days.

Percentage of Sunny Days in December in Montreal

The chart illustrates the percentage of sunny days in Montreal throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Montreal experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec37%39%43%36%41%36%33%46%41%29%45%29%
Data source: Montreal December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Montreal in December

In December, Montreal experiences the shortest daylight duration of the year, with just 8 hours of daylight. This is a noticeable dip as the days grow darker following the autumn months, where daylight lingers for about 9 hours in November. The trend is part of a larger cycle where daylight steadily increases from the depths of winter through the spring, culminating in the long, sunlit days of summer, peaking at 15 hours in June and July. As the year progresses, daylight gradually lengthens, bringing a welcome return of brightness after the chilly December days. This rhythmic pattern not only highlights the beauty of the changing seasons but also emphasizes the anticipation of longer, sunny days ahead.

Average Daylight Hours in Montreal for December

The chart illustrates the variation in daylight duration in Montreal throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 8m10h 23m11h 57m13h 33m14h 55m15h 36m15h 14m14h12h 28m10h 52m9h 28m8h 45m
Data source: Montreal daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Montreal

As December rolls in, Montreal experiences a notable shift in its wind patterns, with an average wind speed of 4.0 m/s (9 mph). This increase marks a transition to a brisker season, contrasting with the milder breezes of the summer months, when wind speeds hovered around 3.0 m/s (7 mph). Interestingly, the month's wind velocity is higher than both November and the preceding months, suggesting that winter's crisp air is beginning to assert itself. While the wind in the spring months peaks at around 4.5 m/s (10 mph) in March, December's gusts signal a cold, invigorating warmth as the city prepares for a snowy embrace. Overall, the trend shows a seasonal escalation in wind speed as temperatures drop, compelling Montrealers to bundle up and enjoy the spirited winter air.

Average December Wind Speed in Montreal

The chart displays monthly wind speed patterns in Montreal, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.23.64.53.53.43.73.03.03.43.23.44.0 m/s
Data source: Montreal December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Montreal Compares to Other Months

The weather in Montreal changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Montreal and find detailed weather information for every month.

December and January present a notable contrast in weather conditions. In December, temperatures range from a chilly minimum of -26°C (-15°F) to an average of -5°C (24°F), with a maximum reaching up to 14°C (57°F). The month sees around 88 mm (3.5 in) of precipitation over 12 days, accompanied by a relatively high humidity of 89%. In contrast, January experiences even colder temperatures, with a minimum plunging to -32°C (-25°F) and an average of -8°C (17°F), while the maximum climbs to only 9°C (49°F). Precipitation slightly decreases to 84 mm (3.3 in) over 11 days, and the humidity rises to 93%. For a more detailed look at weather patterns during the month, you can check out Montreal weather in January.

December and February present quite similar winter conditions, but with some notable differences. In December, temperatures can drop as low as -26°C (-15°F), with an average of -5°C (24°F) and a maximum of 14°C (57°F). The month sees approximately 88 mm (3.5 in) of precipitation over about 12 days, while humidity levels hover around 89%. In contrast, February experiences slightly milder temperatures, with a minimum of -25°C (-13°F), an average of -7°C (20°F), and a maximum of 13°C (56°F). Precipitation is similar, at 82 mm (3.2 in) over the same number of days, but humidity is a bit higher at 92%. For a detailed look at February conditions, you can check out Montreal weather in February.

In December, temperatures can dip as low as -26°C (-15°F), with an average of -5°C (24°F) and a maximum of 14°C (57°F), while March sees slightly milder conditions with a minimum of -23°C (-9°F) and an average of -2°C (29°F), reaching highs of up to 20°C (69°F). Both months receive similar amounts of precipitation, with December totaling 88 mm (3.5 in) over 12 days, and March totaling 84 mm (3.3 in) over 11 days, showcasing a consistent weather pattern. Humidity levels are also comparable, at 89% in December compared to 86% in March. For more specific insights into March weather, you can refer to Montreal weather in March.

In December, the weather is considerably colder, with temperatures ranging from a minimum of -26°C (-15°F) to a maximum of 14°C (57°F) and an average of -5°C (24°F). The high humidity of 89% contributes to the chill, and the month sees about 88 mm (3.5 in) of precipitation over 12 days. Conversely, in April, the climate begins to warm up, with minimum temperatures around -10°C (14°F) and maximums reaching 25°C (78°F), giving an average of 6°C (43°F). Although April sees a slightly higher total precipitation of 121 mm (4.7 in), the humidity remains manageable at 85%. For more details on the weather in April, you can check Montreal weather in April.

December and May present stark contrasts in weather. In December, temperatures can plunge as low as -26°C (-15°F), with an average around -5°C (24°F) and occasional highs reaching 14°C (57°F). The month is characterized by significant humidity at 89% and approximately 88 mm (3.5 in) of precipitation over about 12 days. In contrast, May experiences milder conditions, with temperatures ranging from a minimum of -1°C (30°F) to a sweltering maximum of 36°C (97°F) and an average of 14°C (57°F). While May sees slightly more precipitation at 97 mm (3.8 in) over 11 days, it boasts lower humidity at 80%. For more details on the weather specifics in May, you can visit Montreal weather in May.

December and June present starkly contrasting weather conditions. In December, temperatures can plummet to a minimum of -26°C (-15°F), with an average of -5°C (24°F) and a maximum reaching 14°C (57°F). The month is characterized by high humidity at 89% and a total precipitation of 88 mm over 12 days. In contrast, June offers a much milder climate, with a minimum temperature of 3°C (38°F) and an average of 19°C (67°F), peaking at 34°C (94°F). Although June has slightly higher precipitation at 103 mm, it occurs over the same number of days, but with a significantly lower humidity level of 74%. For more details on June weather, visit Montreal weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures plummet, with lows reaching -26°C (-15°F) and average readings around -5°C (24°F), while highs can only manage a mild 14°C (57°F). The month experiences significant precipitation, totaling 88 mm (3.5 in) over about 12 days, accompanied by a high humidity level of 89%. In contrast, July boasts a much warmer climate, with temperatures ranging from a minimum of 10°C (50°F) to a scorching maximum of 35°C (95°F), and an average temperature of 22°C (72°F). While July does see a bit more precipitation—with a total of 103 mm (4.1 in) over 14 days—its humidity is significantly lower at 76%. This makes July a much more pleasant and vibrant month compared to the frigid depths of winter in December. For more details about the weather in July, visit Montreal weather in July.

December and August in Montreal present starkly contrasting weather conditions. In December, temperatures can plummet as low as -26°C (-15°F), with an average of -5°C (24°F) and occasional highs reaching 14°C (57°F). This month experiences 12 days of precipitation, contributing to a high humidity level of 89%. In contrast, August boasts much milder weather, with minimum temperatures around 8°C (47°F) and averages rising to 21°C (70°F), peaking at 33°C (92°F). While August has a slightly higher precipitation level of 109 mm (4.3 in) over 13 days, its humidity is lower at 75%. Overall, the two months exemplify the seasonal extremes typical of Montreal, highlighting the significant shift from the cold grip of winter to the warmth of summer. For more detailed information, check Montreal weather in August.

December weather contrasts sharply with September, showcasing a significant drop in temperatures and an increase in humidity. While September averages a mild 16°C (62°F), December's average temperature plummets to -5°C (24°F), with lows reaching as frigid as -26°C (-15°F). Precipitation is also notable, with December receiving 88 mm (3.5 in) over 12 days, compared to September's 73 mm (2.9 in) over 9 days. Additionally, December's humidity levels rise to 89%, while September remains lower at 78%. For more details on September weather, check out Montreal weather in September.

When comparing the weather in December to October, a stark contrast becomes apparent. December experiences much colder temperatures, with a minimum of -26°C (-15°F) and an average of -5°C (24°F), while October offers milder conditions, ranging from a minimum of -4°C (25°F) to an average of 10°C (50°F). Precipitation is more frequent in October, totaling 139 mm (5.5 in) over 13 days, compared to December’s 88 mm (3.5 in) across 12 days. Additionally, December's humidity remains high at 89%, slightly edging past October's 86%. Overall, October is characterized by more pleasant temperatures and higher rainfall, as detailed in Montreal weather in October.

In December, the weather takes a notable turn compared to November. While November experiences milder temperatures with an average of 2°C (35°F) and a maximum of 23°C (73°F), December's average dips significantly to -5°C (24°F), with highs reaching only up to 14°C (57°F). Precipitation levels are slightly lower in December at 88 mm (3.5 in) over 12 days, compared to November's 118 mm (4.6 in) across 13 days. Despite this decrease, December maintains a high humidity level of 89%, similar to November's 88%. For a more detailed comparison, you can check Montreal weather in November.

Compare Montreal's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Montreal

As December settles over Montreal, the city experiences a striking contrast to the milder months earlier in the year. With temperatures plummeting to average lows around -5°C and occasional frosty spells dipping as low as -26°C, the winter chill becomes a defining feature of the month. This shift is complemented by higher humidity levels reaching 89%, culminating in an ambiance that feels particularly brisk. December also marks a noticeable uptick in precipitation, with about 12 days of snowfall or rain adding to the picturesque winter scene. For a deeper understanding of how the December climate shapes Montreal's distinctive character, explore more at Montreal Climate.