January Weather in Alliston, Canada

Last updated: June 18, 2025

In January, the average temperature in Alliston, Canada hovers around -6°C (21°F), with extremes ranging from a chilling -30°C (-22°F) to a relatively mild 12°C (53°F). Expect 59 mm (2.3 in) of precipitation over 9 days, contributing to the region's average humidity of 93%. Be prepared for a brisk and damp atmosphere during this time!

January Temperature in Alliston

In January in Alliston, the average temperature is -6°C (21°F). The maximum can reach 12°C (53°F), and the minimum can be as low as -30°C (-22°F). Travelers should prepare for a wide range of temperatures and dress accordingly for chilly conditions.

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

The chart illustrates January temperature patterns in Alliston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alliston, January typically has an average temperature of -6°C (21°F), with highs reaching up to 12°C (53°F) and lows dropping to around -30°C (-22°F).

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

January Precipitation in Alliston

In Alliston in January, the precipitation amount is 59 mm (2.3 in) over the course of 9 days.

January Precipitation Trends in Alliston

The chart displays monthly precipitation patterns in Alliston, 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 Alliston, January typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Alliston

In Alliston in January, humidity is 93%. With an average temperature of -6°C (21°F), this humidity feels like an icy mist that clings to your skin, making every breath feel crisp and challenging for outdoor exploration.

January Average Humidity in Alliston

This chart illustrates the average monthly humidity levels in Alliston, 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 Alliston 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 Alliston

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

Maximum UV Index Levels in Alliston for January

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

Data source: Alliston 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 Alliston Compares to Other Months

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

This table compares monthly weather conditions in Alliston, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	59 mm (2.3 inches)	93%	low
February Weather	-5°C (23°F)	62 mm (2.5 inches)	94%	moderate
March Weather	-1°C (31°F)	58 mm (2.3 inches)	87%	moderate
April Weather	5°C (42°F)	102 mm (4.0 inches)	82%	very high
May Weather	13°C (55°F)	99 mm (3.9 inches)	74%	very high
June Weather	18°C (65°F)	94 mm (3.7 inches)	68%	very high
July Weather	21°C (71°F)	90 mm (3.5 inches)	67%	very high
August Weather	20°C (69°F)	96 mm (3.8 inches)	67%	very high
September Weather	16°C (61°F)	68 mm (2.7 inches)	74%	high
October Weather	10°C (50°F)	98 mm (3.9 inches)	83%	moderate
November Weather	2°C (36°F)	76 mm (3.0 inches)	89%	moderate
December Weather	-3°C (28°F)	69 mm (2.7 inches)	91%	low