January Weather in Harriston, Canada

Last updated: June 18, 2025

In January, the average temperature in Harriston, Canada hovers around -6°C (21°F). However, residents can experience a chillier minimum of -25°C (-12°F), while the mercury can rise to a maximum of 11°C (52°F). Precipitation is moderate, with 76 mm (3.0 in) expected over 13 days, contributing to an average humidity level of 90%.

January Temperature in Harriston

In January in Harriston, the average temperature is -6°C (21°F), with maximums reaching 11°C (52°F) and minimums plunging as low as -25°C (-12°F). Travelers should be prepared for a chilly climate and pack accordingly to enjoy their stay comfortably.

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

The chart illustrates January temperature patterns in Harriston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harriston, January typically has an average temperature of -6°C (21°F), with highs reaching up to 11°C (52°F) and lows dropping to around -25°C (-12°F).

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

January Precipitation in Harriston

In Harriston in January, the total precipitation amount is 76 mm (3.0 in), which occurs over the course of 13 days.

January Precipitation Trends in Harriston

The chart displays monthly precipitation patterns in Harriston, 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 Harriston, January typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 13 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 Harriston

In Harriston in January humidity is 90%. With an average temperature of -6°C (21°F), this humidity feels like a heavy, icy mist that clings to your skin, making every breath feel sharp and cold, which can be quite challenging for traveling.

January Average Humidity in Harriston

This chart illustrates the average monthly humidity levels in Harriston, 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 Harriston is approximately 90%, 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 Harriston

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

Maximum UV Index Levels in Harriston for January

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

Data source: Harriston 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 Harriston Compares to Other Months

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

This table compares monthly weather conditions in Harriston, 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)	76 mm (3.0 inches)	90%	low
February Weather	-6°C (22°F)	83 mm (3.3 inches)	90%	moderate
March Weather	-1°C (30°F)	70 mm (2.8 inches)	87%	moderate
April Weather	5°C (41°F)	107 mm (4.2 inches)	87%	very high
May Weather	12°C (54°F)	103 mm (4.1 inches)	82%	very high
June Weather	18°C (64°F)	106 mm (4.2 inches)	81%	very high
July Weather	20°C (69°F)	89 mm (3.5 inches)	79%	very high
August Weather	19°C (67°F)	110 mm (4.3 inches)	80%	very high
September Weather	15°C (60°F)	94 mm (3.7 inches)	81%	high
October Weather	9°C (49°F)	111 mm (4.4 inches)	84%	moderate
November Weather	1°C (35°F)	95 mm (3.8 inches)	88%	moderate
December Weather	-3°C (28°F)	83 mm (3.2 inches)	87%	low