January Weather in Harriston, United States

Last updated: June 24, 2025

In Harriston, United States, the average temperature in January hovers around 2°C (35°F). During this time, temperatures can vary significantly, with a minimum of -21°C (-5°F) and a maximum reaching up to 20°C (69°F). Expect approximately 60 mm (2.4 in) of precipitation spread over 7 days, accompanied by an average humidity of 86%.

January Temperature in Harriston

In January in Harriston, the average temperature is 2°C (35°F), with maximums reaching up to 20°C (69°F) and minimums dropping as low as -21°C (-5°F). Be sure to pack accordingly for a wide range of weather conditions during your travels.

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 2°C (35°F), with highs reaching up to 20°C (69°F) and lows dropping to around -21°C (-5°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 precipitation amount is 60 mm (2.4 in) over the course of 7 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 60 mm (2.4 inches) of precipitation spread over approximately 7 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 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

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 86%, 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 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Harriston, you can check the information here.

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 3, which falls under the moderate 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	2°C (35°F)	60 mm (2.4 inches)	86%	moderate
February Weather	5°C (40°F)	87 mm (3.4 inches)	86%	moderate
March Weather	7°C (46°F)	67 mm (2.6 inches)	86%	high
April Weather	13°C (55°F)	108 mm (4.2 inches)	84%	very high
May Weather	18°C (65°F)	110 mm (4.3 inches)	78%	extreme
June Weather	22°C (72°F)	89 mm (3.5 inches)	79%	very high
July Weather	25°C (77°F)	59 mm (2.3 inches)	70%	very high
August Weather	24°C (75°F)	108 mm (4.2 inches)	59%	very high
September Weather	21°C (69°F)	102 mm (4.0 inches)	68%	very high
October Weather	15°C (60°F)	106 mm (4.2 inches)	80%	high
November Weather	7°C (44°F)	76 mm (3.0 inches)	86%	moderate
December Weather	4°C (39°F)	84 mm (3.3 inches)	85%	moderate