July Weather in Alliston, Canada

Last updated: June 18, 2025

In Alliston, Canada, the average temperature in July hovers around 21°C (71°F), making it a pleasant time to explore. Expect a minimum of 9°C (48°F) and a peak of 36°C (96°F), offering a range of experiences for all weather preferences. With 90 mm (3.5 in) of precipitation spread over 12 days, occasional showers can refresh the air, while the average humidity remains at 67%. Whether you’re seeking warmth or a light drizzle, this month has something for everyone!

July Temperature in Alliston

In July in Alliston, the average temperature is 21°C (71°F). The maximum can reach 36°C (96°F), while the minimum can be as low as 9°C (48°F). This makes Alliston an ideal destination for travelers who enjoy warm weather but should also prepare for cooler evenings.

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

The chart illustrates July 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, July typically has an average temperature of 21°C (71°F), with highs reaching up to 36°C (96°F) and lows dropping to around 9°C (48°F).

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

July Precipitation in Alliston

In Alliston in July, the precipitation amount is 90 mm (3.5 in) spread over 12 days.

July Precipitation Trends in Alliston

The chart displays monthly precipitation patterns in Alliston, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Alliston, July typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Alliston

In Alliston in July humidity is 67%. With an average temperature of 21°C (71°F), this humidity feels like a warm blanket wrapping around you, making traveling both refreshing and a bit stifling at times, as the air clings to your skin and encourages slow, leisurely exploration.

July Average Humidity in Alliston

This chart illustrates the average monthly humidity levels in Alliston, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Alliston is approximately 67%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Alliston

In Alliston in July, 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 July

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

Data source: Alliston July 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 July 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 July’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 July’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