January Weather in Markham, Canada

Last updated: June 18, 2025

In January, the average temperature in Markham, Canada hovers around -3°C (27°F), but it can dip as low as -22°C (-7°F) and rise to a maximum of 9°C (49°F). With 80 mm (3.2 in) of precipitation spread over 10 days, and an average humidity level of 91%, expect a chilly and damp atmosphere.

January Temperature in Markham

In January in Markham, the average temperature is -3°C (27°F), with maximums reaching 9°C (49°F) and minimums dropping as low as -22°C (-7°F). Be sure to pack warm clothing to stay comfortable during your visit.

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

The chart illustrates January temperature patterns in Markham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Markham, January typically has an average temperature of -3°C (27°F), with highs reaching up to 9°C (49°F) and lows dropping to around -22°C (-7°F).

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

January Precipitation in Markham

In Markham in January, the precipitation amount is 80 mm (3.2 in) over a span of 10 days.

January Precipitation Trends in Markham

The chart displays monthly precipitation patterns in Markham, 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 Markham, January typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 10 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 Markham

In Markham in January humidity is 91%. With an average temperature of -3°C (27°F), this humidity feels like a thick, icy blanket wrapping around you, making travel quite uncomfortable as every breath is a mix of frigid air and moisture, and the cold dampness clings to your skin, turning even short outings into a test of endurance.

January Average Humidity in Markham

This chart illustrates the average monthly humidity levels in Markham, 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 Markham is approximately 91%, 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 Markham

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

Maximum UV Index Levels in Markham for January

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

Data source: Markham 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 Markham Compares to Other Months

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

This table compares monthly weather conditions in Markham, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	80 mm (3.2 inches)	91%	low
February Weather	-3°C (28°F)	83 mm (3.3 inches)	91%	moderate
March Weather	0°C (33°F)	75 mm (2.9 inches)	88%	moderate
April Weather	5°C (41°F)	118 mm (4.6 inches)	88%	very high
May Weather	10°C (50°F)	103 mm (4.1 inches)	82%	very high
June Weather	16°C (62°F)	80 mm (3.1 inches)	79%	very high
July Weather	21°C (71°F)	73 mm (2.9 inches)	77%	very high
August Weather	21°C (71°F)	76 mm (3.0 inches)	72%	very high
September Weather	18°C (65°F)	69 mm (2.7 inches)	76%	high
October Weather	12°C (54°F)	115 mm (4.5 inches)	83%	moderate
November Weather	4°C (40°F)	96 mm (3.8 inches)	88%	moderate
December Weather	0°C (33°F)	91 mm (3.6 inches)	87%	low