March Weather in Alliston, Canada

Last updated: June 18, 2025

In March, the average temperature in Alliston, Canada hovers around -1°C (31°F). However, fluctuations can be significant, with minimums dipping as low as -19°C (-3°F) and maximums reaching up to 21°C (71°F). Expect about 58 mm (2.3 in) of precipitation spread over 10 days, and a notably high average humidity of 87%.

March Temperature in Alliston

In March in Alliston, the average temperature is -1°C (31°F). The maximum can reach 21°C (71°F), while the minimum can drop as low as -19°C (-3°F). Be prepared for a wide range of temperatures, making layering essential for your travels.

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

The chart illustrates March 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, March typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (71°F) and lows dropping to around -19°C (-3°F).

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

March Precipitation in Alliston

In Alliston in March, the total precipitation amount is 58 mm (2.3 in), measured over a span of 10 days.

March Precipitation Trends in Alliston

The chart displays monthly precipitation patterns in Alliston, 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 Alliston, March typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Alliston

In Alliston in March humidity is 87%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps through your clothes, making traveling incredibly uncomfortable as it adds a layer of dampness to the already cold air, leaving you shivering and wishing for warmth.

March Average Humidity in Alliston

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

In Alliston 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 Alliston.

Maximum UV Index Levels in Alliston for March

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

Data source: Alliston 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 Alliston Compares to Other Months

Weather in Alliston varies notably across the year, with each month offering distinct climate conditions. This page compares March’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 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)	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