June Weather in Alliston, Canada

Last updated: June 18, 2025

In June, the average temperature in Alliston, Canada hovers around 18°C (65°F). Expect a range from a chilly 4°C (39°F) to a warm 34°C (93°F). This month also brings about 94 mm (3.7 in) of precipitation over 10 days, accompanied by an average humidity level of 68%, creating a unique blend of conditions perfect for experiencing the local environment!

June Temperature in Alliston

In June, in Alliston, the average temperature is 18°C (65°F). Maximums can reach 34°C (93°F), while minimums can drop to as low as 4°C (39°F). This makes Alliston a comfortable destination for travelers seeking both warmth and cool respite.

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

The chart illustrates June 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, June typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (93°F) and lows dropping to around 4°C (39°F).

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

June Precipitation in Alliston

In Alliston in June, the precipitation amount is 94 mm (3.7 in) over a duration of 10 days.

June Precipitation Trends in Alliston

The chart displays monthly precipitation patterns in Alliston, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Alliston, June typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Alliston

In Alliston in June, humidity is 68%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel somewhat sticky and requiring occasional breaks for refreshing hydration.

June Average Humidity in Alliston

This chart illustrates the average monthly humidity levels in Alliston, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Alliston is approximately 68%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Alliston

In Alliston in June, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Alliston.

Maximum UV Index Levels in Alliston for June

The chart shows the monthly maximum UV Index (UVI) for Alliston in June, 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 June, the maximum UV index in Alliston typically reaches 9, which falls under the very high exposure category.

Data source: Alliston June 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 June 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 June’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 June’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