January Weather in Castlegar, Canada

Last updated: June 18, 2025

In Castlegar, Canada, the average temperature in January hovers around -6°C (21°F). Temperatures can plunge to a brisk -26°C (-15°F) or creep up to a maximum of 4°C (39°F). During this chilly month, expect about 100 mm (4.0 in) of precipitation spread over 14 days, accompanied by a high average humidity of 90%. Prepare for a truly wintry experience!

January Temperature in Castlegar

In January in Castlegar, the average temperature is -6°C (21°F), with the maximum reaching 4°C (39°F) and the minimum plunging to as low as -26°C (-15°F). Travelers should be prepared for frigid conditions and bundle up accordingly.

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

The chart illustrates January 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, January typically has an average temperature of -6°C (21°F), with highs reaching up to 4°C (39°F) and lows dropping to around -26°C (-15°F).

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

January Precipitation in Castlegar

In Castlegar in January, the total precipitation amount reaches 100 mm (4.0 in) over the course of 14 days.

January Precipitation Trends in Castlegar

The chart displays monthly precipitation patterns in Castlegar, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Castlegar, January typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Castlegar

In Castlegar in January humidity is 90%. With an average temperature of -6°C (21°F), this humidity feels like a heavy, icy mist that clings to your skin, making every breath feel sharp and cold, which can be quite challenging for traveling.

January Average Humidity in Castlegar

This chart illustrates the average monthly humidity levels in Castlegar, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Castlegar is approximately 90%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Castlegar

In Castlegar in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Castlegar, you can visit Hourly UV Index in Castlegar.

Maximum UV Index Levels in Castlegar for January

The chart shows the monthly maximum UV Index (UVI) for Castlegar in January, 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 January, the maximum UV index in Castlegar typically reaches 2, which falls under the low exposure category.

Data source: Castlegar January 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 January 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 January’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 January’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