May Weather in South River, Canada

Last updated: June 18, 2025

In May, the average temperature in South River, Canada hovers around 11°C (53°F). While you can expect an occasional chill with minimums dipping to -5°C (23°F), the warmth can peak at a balmy 34°C (94°F). With 106 mm (4.2 in) of precipitation spread across 11 days, the air retains a humid touch, averaging at 74% humidity.

May Temperature in South River

In May in South River, the average temperature is 11°C (53°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as -5°C (23°F). It's advisable to pack layers for your trip to South River to accommodate the wide range of temperatures you might encounter.

May Weather in South River: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South River, May typically has an average temperature of 11°C (53°F), with highs reaching up to 34°C (94°F) and lows dropping to around -5°C (23°F).

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

May Precipitation in South River

In South River in May, the precipitation amount is 106 mm (4.2 in) spread over a duration of 11 days.

May Precipitation Trends in South River

The chart displays monthly precipitation patterns in South River, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In South River, May typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in South River

In South River in May humidity is 74%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less inviting and suggesting that travelers should dress in layers to stay warm and comfortable.

May Average Humidity in South River

This chart illustrates the average monthly humidity levels in South River, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in South River is approximately 74%, offering insight into how humid the weather typically is during this month.

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

May UV Index in South River

In South River in May, 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 South River.

Maximum UV Index Levels in South River for May

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

Data source: South River May 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 May Weather in South River Compares to Other Months

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

This table compares monthly weather conditions in South River, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (15°F)	65 mm (2.6 inches)	93%	low
February Weather	-9°C (17°F)	78 mm (3.1 inches)	94%	moderate
March Weather	-4°C (25°F)	63 mm (2.5 inches)	87%	moderate
April Weather	4°C (39°F)	107 mm (4.2 inches)	82%	high
May Weather	11°C (53°F)	106 mm (4.2 inches)	74%	very high
June Weather	16°C (62°F)	126 mm (5.0 inches)	68%	very high
July Weather	20°C (68°F)	108 mm (4.3 inches)	67%	very high
August Weather	18°C (65°F)	133 mm (5.3 inches)	67%	very high
September Weather	14°C (57°F)	133 mm (5.2 inches)	74%	high
October Weather	8°C (46°F)	116 mm (4.5 inches)	83%	moderate
November Weather	-1°C (31°F)	100 mm (4.0 inches)	89%	moderate
December Weather	-6°C (21°F)	86 mm (3.4 inches)	91%	low