January Weather in Longueuil, Canada

Last updated: June 18, 2025

In January, the average temperature in Longueuil, Canada hovers around -8°C (17°F). However, temperatures can plunge to a chilling -32°C (-25°F) or rise to a mild 9°C (49°F). Rain is not uncommon, with a total precipitation of 84 mm (3.3 in) spread over 11 days. Additionally, brace yourself for the high average humidity of 93%, making it a truly wintry experience!

January Temperature in Longueuil

In January in Longueuil, the average temperature is -8°C (17°F). Maximum temperatures can reach 9°C (49°F), while minimums can drop as low as -32°C (-25°F). Travelers should be prepared for extremely cold conditions and dress warmly to enjoy outdoor activities.

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

The chart illustrates January temperature patterns in Longueuil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longueuil, January typically has an average temperature of -8°C (17°F), with highs reaching up to 9°C (49°F) and lows dropping to around -32°C (-25°F).

Data source: Temperature data for Longueuil generated using information from the Copernicus Climate Change Service.

January Precipitation in Longueuil

In Longueuil, in January, the precipitation amount is 84 mm (3.3 in) during a period of 11 days.

January Precipitation Trends in Longueuil

The chart displays monthly precipitation patterns in Longueuil, 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 Longueuil, January typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Longueuil

In Longueuil in January humidity is 93%. With an average temperature of -8°C (17°F), this humidity feels like a biting chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel quite challenging.

January Average Humidity in Longueuil

This chart illustrates the average monthly humidity levels in Longueuil, 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 Longueuil is approximately 93%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Longueuil

In Longueuil 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 Longueuil, you can visit Hourly UV Index in Longueuil.

Maximum UV Index Levels in Longueuil for January

The chart shows the monthly maximum UV Index (UVI) for Longueuil 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 Longueuil typically reaches 2, which falls under the low exposure category.

Data source: Longueuil 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 Longueuil Compares to Other Months

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

This table compares monthly weather conditions in Longueuil, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	84 mm (3.3 inches)	93%	low
February Weather	-7°C (20°F)	82 mm (3.2 inches)	92%	moderate
March Weather	-2°C (29°F)	84 mm (3.3 inches)	86%	moderate
April Weather	6°C (43°F)	121 mm (4.7 inches)	85%	high
May Weather	14°C (57°F)	97 mm (3.8 inches)	80%	very high
June Weather	19°C (67°F)	103 mm (4.1 inches)	74%	very high
July Weather	22°C (72°F)	103 mm (4.1 inches)	76%	very high
August Weather	21°C (70°F)	109 mm (4.3 inches)	75%	very high
September Weather	16°C (62°F)	73 mm (2.9 inches)	78%	high
October Weather	10°C (50°F)	139 mm (5.5 inches)	86%	moderate
November Weather	2°C (35°F)	118 mm (4.6 inches)	88%	moderate
December Weather	-5°C (24°F)	88 mm (3.5 inches)	89%	low