June Weather in Sarnia, Canada

Last updated: June 18, 2025

In Sarnia, Canada, the average temperature in June is a pleasant 20°C (68°F), making it an ideal time to explore the area. Visitors can expect temperatures to range from a brisk 8°C (47°F) at the minimum to a warm 31°C (89°F) at the maximum. Be prepared for some rain, as precipitation averages 86 mm (3.4 in) over 11 days, and the overall humidity sits at a notable 80%. Enjoy your stay and embrace the diverse weather conditions!

June Temperature in Sarnia

In June, in Sarnia, the average temperature is 20°C (68°F). Maximum can reach 31°C (89°F) and minimum can be as low as 8°C (47°F). This makes it a perfect time for travelers to enjoy a variety of outdoor activities while experiencing pleasant weather.

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

The chart illustrates June temperature patterns in Sarnia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sarnia, June typically has an average temperature of 20°C (68°F), with highs reaching up to 31°C (89°F) and lows dropping to around 8°C (47°F).

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

June Precipitation in Sarnia

In Sarnia in June, the precipitation amount is 86 mm (3.4 in), spread over 11 days.

June Precipitation Trends in Sarnia

The chart displays monthly precipitation patterns in Sarnia, 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 Sarnia, June typically receives around 86 mm (3.4 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 Sarnia

In Sarnia in June, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

June Average Humidity in Sarnia

This chart illustrates the average monthly humidity levels in Sarnia, 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 Sarnia is approximately 80%, 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 Sarnia

In Sarnia 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 Sarnia.

Maximum UV Index Levels in Sarnia for June

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

Data source: Sarnia 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 Sarnia Compares to Other Months

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

This table compares monthly weather conditions in Sarnia, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	60 mm (2.4 inches)	88%	low
February Weather	-3°C (28°F)	66 mm (2.6 inches)	87%	moderate
March Weather	1°C (35°F)	63 mm (2.5 inches)	85%	moderate
April Weather	7°C (45°F)	95 mm (3.7 inches)	86%	very high
May Weather	13°C (57°F)	97 mm (3.8 inches)	80%	very high
June Weather	20°C (68°F)	86 mm (3.4 inches)	80%	very high
July Weather	23°C (73°F)	73 mm (2.9 inches)	80%	very high
August Weather	22°C (72°F)	79 mm (3.1 inches)	80%	very high
September Weather	18°C (65°F)	73 mm (2.9 inches)	80%	high
October Weather	12°C (54°F)	106 mm (4.2 inches)	84%	moderate
November Weather	4°C (40°F)	72 mm (2.8 inches)	89%	moderate
December Weather	0°C (33°F)	55 mm (2.2 inches)	86%	low