August Weather in Waterloo, Canada

Last updated: June 18, 2025

In August, the average temperature in Waterloo, Canada hovers around 20°C (69°F), with a minimum of 6°C (43°F) and a maximum reaching up to 31°C (88°F). Expect 97 mm (3.8 in) of precipitation spread over about 12 days. With an average humidity of 80%, the climate offers a muggy yet pleasant atmosphere, perfect for exploring!

August Temperature in Waterloo

In August in Waterloo, the average temperature is 20°C (69°F). The maximum can reach 31°C (88°F), and the minimum can be as low as 6°C (43°F). This pleasant temperature range makes Waterloo an ideal destination for travelers seeking a comfortable climate.

August Weather in Waterloo: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, August typically has an average temperature of 20°C (69°F), with highs reaching up to 31°C (88°F) and lows dropping to around 6°C (43°F).

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

August Precipitation in Waterloo

In Waterloo in August, the precipitation amount is 97 mm (3.8 in) spread over 12 days.

August Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Waterloo, August typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Waterloo

In Waterloo in August, humidity is 80%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making every step slightly more challenging as you navigate the air that clings to your skin, often leaving you longing for a cool breeze while exploring the sights.

August Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Waterloo is approximately 80%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Waterloo

In Waterloo in August, 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 Waterloo.

Maximum UV Index Levels in Waterloo for August

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

Data source: Waterloo August 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 August Weather in Waterloo Compares to Other Months

Weather in Waterloo varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Waterloo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Waterloo, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	73 mm (2.9 inches)	90%	low
February Weather	-5°C (24°F)	77 mm (3.0 inches)	90%	moderate
March Weather	0°C (32°F)	67 mm (2.6 inches)	87%	moderate
April Weather	5°C (42°F)	100 mm (3.9 inches)	87%	very high
May Weather	13°C (56°F)	98 mm (3.8 inches)	82%	very high
June Weather	18°C (66°F)	104 mm (4.1 inches)	81%	very high
July Weather	21°C (71°F)	75 mm (3.0 inches)	79%	very high
August Weather	20°C (69°F)	97 mm (3.8 inches)	80%	very high
September Weather	16°C (62°F)	75 mm (3.0 inches)	81%	high
October Weather	10°C (50°F)	104 mm (4.1 inches)	84%	moderate
November Weather	2°C (36°F)	83 mm (3.3 inches)	88%	moderate
December Weather	-2°C (29°F)	74 mm (2.9 inches)	87%	low