July Weather in Harriston, Canada

Last updated: June 18, 2025

In July, the average temperature in Harriston, Canada hovers around 20°C (69°F), with minimums dipping to 8°C (47°F) and maximums soaring to 32°C (90°F). Expect 89 mm (3.5 in) of precipitation over approximately 12 days, accompanied by an average humidity level of 79%.

July Temperature in Harriston

In July in Harriston, the average temperature is 20°C (69°F). Maximum temperatures can reach 32°C (90°F), while minimums can be as low as 8°C (47°F). It's a great time to visit for those who enjoy mild to warm weather with a chance to experience some cooler evenings.

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

The chart illustrates July 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, July typically has an average temperature of 20°C (69°F), with highs reaching up to 32°C (90°F) and lows dropping to around 8°C (47°F).

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

July Precipitation in Harriston

In Harriston in July, the precipitation amount is 89 mm (3.5 in) during 12 days of rainfall.

July Precipitation Trends in Harriston

The chart displays monthly precipitation patterns in Harriston, 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 Harriston, July typically receives around 89 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.

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Millimeters (mm) Inches (in)

July Humidity in Harriston

In Harriston in July humidity is 79%. With an average temperature of 20°C (69°F), this humidity feels like a warm, steamy embrace, making travel slightly uncomfortable as the air feels heavy and sticky, often leaving you yearning for a cool breeze or air conditioning to escape the dampness.

July Average Humidity in Harriston

This chart illustrates the average monthly humidity levels in Harriston, 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 Harriston is approximately 79%, 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 Harriston

In Harriston 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 Harriston.

Maximum UV Index Levels in Harriston for July

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

Data source: Harriston 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 Harriston Compares to Other Months

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