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January Weather in Montreal, United States

Last updated: June 24, 2025

In January, the average temperature in Montreal, United States hovers around -9°C (16°F), with possible extremes ranging from a chilling -28°C (-19°F) to a more mild 7°C (45°F). During this month, expect about 39 mm (1.5 in) of precipitation spread across 11 days, contributing to an average humidity of a damp 93%. Prepare for a truly wintry experience!

January Temperature in Montreal

In January in Montreal, the average temperature is -9°C (16°F), with maximums reaching 7°C (45°F) and minimums dropping to -28°C (-19°F). It's advisable to pack warm clothing and prepare for possibly severe cold weather if you're planning to travel during this time.

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

The chart illustrates January 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. In Montreal, January typically has an average temperature of -9°C (16°F), with highs reaching up to 7°C (45°F) and lows dropping to around -28°C (-19°F).
JanFebMarAprMayJunJulAugSepOctNovDec161528385465706660463122
Data source: Temperature data for Montreal generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Montreal

In Montreal in January, the precipitation amount is 39 mm (1.5 in) over the course of 11 days.

January Precipitation Trends in Montreal

The chart displays monthly precipitation patterns in Montreal, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Montreal, January typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec395252878711187110941126174
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Montreal

In Montreal in January, humidity is 93%. With an average temperature of -9°C (16°F), this humidity feels like a biting chill that seeps through your layers, making travel outside an exercise in endurance as the cold dampness wraps around you, leaving you longing for warmth and a cozy respite.

January Average Humidity in Montreal

This chart illustrates the average monthly humidity levels in Montreal, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Montreal is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Montreal

In Montreal in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Montreal, you can visit Hourly UV Index in Montreal.

Maximum UV Index Levels in Montreal for January

The chart shows the monthly maximum UV Index (UVI) for Montreal in January, 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. In January, the maximum UV index in Montreal typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458810987532
Data source: Montreal January 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.

How January Weather in Montreal Compares to Other Months

Weather in Montreal varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Montreal, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Montreal, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)39 mm (1.5 inches)93%low
February Weather-9°C (16°F)52 mm (2.1 inches)93%moderate
March Weather-2°C (28°F)52 mm (2.0 inches)89%moderate
April Weather3°C (38°F)87 mm (3.4 inches)85%very high
May Weather12°C (54°F)87 mm (3.4 inches)76%very high
June Weather18°C (65°F)111 mm (4.4 inches)71%very high
July Weather21°C (70°F)87 mm (3.4 inches)70%very high
August Weather19°C (67°F)110 mm (4.3 inches)71%very high
September Weather15°C (60°F)94 mm (3.7 inches)73%high
October Weather8°C (46°F)112 mm (4.4 inches)81%moderate
November Weather-1°C (31°F)61 mm (2.4 inches)87%moderate
December Weather-6°C (22°F)74 mm (2.9 inches)91%low

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