May Weather in Castlegar, Canada

Last updated: June 18, 2025

The average temperature in Castlegar, Canada during May is a comfortable 10°C (50°F). However, temperatures can range from a chilly -4°C (25°F) to a warm 26°C (79°F). Expect some moisture, as the region receives an average precipitation of 78 mm (3.1 in) over about 12 days, contributing to an average humidity level of 82%.

May Temperature in Castlegar

In May in Castlegar, the average temperature is 10°C (50°F). The maximum can reach 26°C (79°F), while the minimum can drop as low as -4°C (25°F). This variability makes it essential for travelers to pack layers to stay comfortable in changing weather conditions.

May Weather in Castlegar: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Castlegar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castlegar, May typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (79°F) and lows dropping to around -4°C (25°F).

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

May Precipitation in Castlegar

In Castlegar in May, the precipitation amount is 78 mm (3.1 in), occurring over a span of 12 days.

May Precipitation Trends in Castlegar

The chart displays monthly precipitation patterns in Castlegar, 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 Castlegar, May typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 12 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 Castlegar

In Castlegar in May, humidity is 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

May Average Humidity in Castlegar

This chart illustrates the average monthly humidity levels in Castlegar, 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 Castlegar is approximately 82%, 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 Castlegar

In Castlegar 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 Castlegar.

Maximum UV Index Levels in Castlegar for May

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

Data source: Castlegar 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 Castlegar Compares to Other Months

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

This table compares monthly weather conditions in Castlegar, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	100 mm (4.0 inches)	90%	low
February Weather	-6°C (21°F)	88 mm (3.5 inches)	91%	moderate
March Weather	0°C (32°F)	101 mm (4.0 inches)	89%	moderate
April Weather	4°C (39°F)	92 mm (3.6 inches)	85%	high
May Weather	10°C (50°F)	78 mm (3.1 inches)	82%	very high
June Weather	14°C (58°F)	70 mm (2.8 inches)	81%	very high
July Weather	19°C (66°F)	32 mm (1.3 inches)	84%	very high
August Weather	18°C (65°F)	37 mm (1.5 inches)	75%	very high
September Weather	12°C (54°F)	69 mm (2.7 inches)	74%	high
October Weather	4°C (40°F)	92 mm (3.6 inches)	85%	moderate
November Weather	-1°C (31°F)	118 mm (4.6 inches)	88%	low
December Weather	-6°C (22°F)	114 mm (4.5 inches)	93%	low