June Weather in Waterloo, Canada

Last updated: June 18, 2025

In June, the average temperature in Waterloo, Canada is a pleasant 18°C (66°F). However, temperatures can fluctuate, with minimums dipping to 4°C (39°F) and soaring to a maximum of 33°C (91°F). Be prepared for some rain, as 104 mm (4.1 in) of precipitation typically falls over 11 days, contributing to an average humidity of 81%.

June Temperature in Waterloo

In June in Waterloo, the average temperature is 18°C (66°F). The maximum can reach 33°C (91°F), while the minimum can drop as low as 4°C (39°F). This range makes it an ideal time for travelers to enjoy a mix of warm sunny days and cooler evenings.

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

The chart illustrates June 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, June typically has an average temperature of 18°C (66°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (39°F).

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

June Precipitation in Waterloo

In Waterloo in June, the precipitation amount is 104 mm (4.1 in) over the course of 11 days.

June Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, 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 Waterloo, June typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

June Humidity in Waterloo

In Waterloo in June, humidity is 81%. With an average temperature of 18°C (66°F), this humidity feels like a warm, sticky embrace, making traveling feel heavy and sluggish, as if the air itself is slowing you down with each step.

June Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, 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 Waterloo is approximately 81%, 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 Waterloo

In Waterloo in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Waterloo.

Maximum UV Index Levels in Waterloo for June

The chart shows the monthly maximum UV Index (UVI) for Waterloo 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 Waterloo typically reaches 10, which falls under the very high exposure category.

Data source: Waterloo 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 Waterloo Compares to Other Months

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