May Weather in Slave Lake, Canada

Last updated: June 18, 2025

The average temperature in Slave Lake, Canada during May hovers around 10°C (50°F). Expect a minimum drop to -6°C (21°F) and a possible maximum rise to 29°C (85°F). Expect precipitation of about 41 mm (1.6 in) spread over 7 days, with an average humidity level of 70%.

May Temperature in Slave Lake

In May in Slave Lake, the average temperature is 10°C (50°F). Maximum temperatures can reach 29°C (85°F), while the minimum can be as low as -6°C (21°F). Be sure to pack for a range of weather conditions when traveling during this time.

May Weather in Slave Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Slave Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slave Lake, May typically has an average temperature of 10°C (50°F), with highs reaching up to 29°C (85°F) and lows dropping to around -6°C (21°F).

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

May Precipitation in Slave Lake

In Slave Lake in May, the precipitation amount is 41 mm (1.6 in) spread over a duration of 7 days.

May Precipitation Trends in Slave Lake

The chart displays monthly precipitation patterns in Slave Lake, 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 Slave Lake, May typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 7 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Slave Lake

In Slave Lake in May, humidity is 70%. With an average temperature of 10°C (50°F), this humidity feels like a cool embrace on your skin, making it a refreshing yet damp experience for traveling.

May Average Humidity in Slave Lake

This chart illustrates the average monthly humidity levels in Slave Lake, 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 Slave Lake is approximately 70%, 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 Slave Lake

In Slave Lake in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Slave Lake.

Maximum UV Index Levels in Slave Lake for May

The chart shows the monthly maximum UV Index (UVI) for Slave Lake 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 Slave Lake typically reaches 7, which falls under the high exposure category.

Data source: Slave Lake 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 Slave Lake Compares to Other Months

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

This table compares monthly weather conditions in Slave Lake, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-11°C (12°F)	21 mm (0.8 inches)	88%	low
February Weather	-13°C (8°F)	24 mm (0.9 inches)	93%	low
March Weather	-6°C (22°F)	23 mm (0.9 inches)	90%	moderate
April Weather	1°C (34°F)	34 mm (1.3 inches)	78%	moderate
May Weather	10°C (50°F)	41 mm (1.6 inches)	70%	high
June Weather	14°C (58°F)	113 mm (4.4 inches)	70%	high
July Weather	16°C (61°F)	121 mm (4.7 inches)	79%	high
August Weather	14°C (58°F)	67 mm (2.7 inches)	78%	high
September Weather	9°C (49°F)	55 mm (2.2 inches)	73%	high
October Weather	2°C (36°F)	44 mm (1.7 inches)	81%	moderate
November Weather	-6°C (22°F)	40 mm (1.6 inches)	85%	low
December Weather	-10°C (14°F)	22 mm (0.9 inches)	93%	low