August Weather in Castlegar, Canada

Last updated: June 18, 2025

In August, the average temperature in Castlegar, Canada is a pleasant 18°C (65°F). However, temperatures can range from a chilly 3°C (37°F) at their lowest to a sizzling 36°C (97°F) at their peak. Expect around 37 mm (1.5 in) of precipitation over the course of 4 days, with average humidity hovering around 75%. Stay prepared for varied weather as you explore this vibrant destination!

August Temperature in Castlegar

In August in Castlegar, the average temperature is 18°C (65°F). Maximums can reach 36°C (97°F), and minimums can be as low as 3°C (37°F). This diverse range of temperatures makes Castlegar an ideal destination for travelers looking to experience both warm and cooler conditions.

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

The chart illustrates August 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, August typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (97°F) and lows dropping to around 3°C (37°F).

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

August Precipitation in Castlegar

In Castlegar in August, the precipitation amount is 37 mm (1.5 in) over the course of 4 days.

August Precipitation Trends in Castlegar

The chart displays monthly precipitation patterns in Castlegar, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Castlegar, August typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 4 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Castlegar

In Castlegar in August, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

August Average Humidity in Castlegar

This chart illustrates the average monthly humidity levels in Castlegar, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Castlegar is approximately 75%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Castlegar

In Castlegar in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Castlegar.

Maximum UV Index Levels in Castlegar for August

The chart shows the monthly maximum UV Index (UVI) for Castlegar in August, 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 August, the maximum UV index in Castlegar typically reaches 8, which falls under the very high exposure category.

Data source: Castlegar August 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 August 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 August’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 August’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