March Weather in Harriston, Canada

Last updated: June 18, 2025

In March, the average temperature in Harriston, Canada hovers around -1°C (30°F), with extremes ranging from a chilly -21°C (-5°F) to a surprisingly warm 19°C (67°F). Expect about 70 mm (2.8 in) of precipitation over 11 days and an average humidity level of 87%, making this month both crisp and damp in this picturesque locale.

March Temperature in Harriston

In March in Harriston, the average temperature is -1°C (30°F), with maximums reaching up to 19°C (67°F) and minimums dropping as low as -21°C (-5°F). Travelers should be prepared for a wide range of temperatures during this time, ensuring they pack both warm clothing for the cold and lighter layers for the milder days.

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

The chart illustrates March 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, March typically has an average temperature of -1°C (30°F), with highs reaching up to 19°C (67°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.

March Precipitation in Harriston

In Harriston in March, the precipitation amount is 70 mm (2.8 in) distributed over 11 days.

March Precipitation Trends in Harriston

The chart displays monthly precipitation patterns in Harriston, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Harriston, March typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Harriston

In Harriston in March, humidity is 87%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.

March Average Humidity in Harriston

This chart illustrates the average monthly humidity levels in Harriston, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Harriston is approximately 87%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Harriston

In Harriston in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Harriston.

Maximum UV Index Levels in Harriston for March

The chart shows the monthly maximum UV Index (UVI) for Harriston in March, 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 March, the maximum UV index in Harriston typically reaches 5, which falls under the moderate exposure category.

Data source: Harriston March 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 March 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 March’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 March’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