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Monthly climate in Castlegar, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Castlegar features a humid continental climate (Dfb). Temperatures typically range between -6 °C (21 °F) and 19 °C (66 °F) through the year, but rarely can drop to -28 °C (-18 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 992 mm (39.0 inches) and receives 147 rainy days on the 1 mm (0.04 inches) threshold annually. Castlegar enjoys an average of 2821 hours of sunshine throughout the year, and daylight varies from 8 hours 14 minutes to 16 hours 10 minutes per day.

Monthly average temperatures in Castlegar, Canada

The warmest months in Castlegar are June, July and August, with daily mean temperatures ranging from 14 to 19 °C (58 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -6 °C (21 - 22 °F) throughout the day. On average each year, Castlegar experiences 38 days above 25 °C (77.0 °F) and 171 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Castlegar. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum4°C
(39°F)		8°C
(47°F)		15°C
(60°F)		20°C
(69°F)		26°C
(79°F)		39°C
(102°F)		38°C
(101°F)		36°C
(97°F)		30°C
(87°F)		22°C
(72°F)		10°C
(51°F)		9°C
(48°F)
Mean maximum3°C
(38°F)		5°C
(41°F)		11°C
(51°F)		16°C
(61°F)		24°C
(76°F)		27°C
(81°F)		33°C
(92°F)		34°C
(93°F)		27°C
(82°F)		16°C
(62°F)		8°C
(47°F)		4°C
(39°F)
Average high-3°C
(27°F)		-2°C
(28°F)		4°C
(39°F)		8°C
(47°F)		16°C
(60°F)		20°C
(68°F)		25°C
(78°F)		25°C
(78°F)		18°C
(64°F)		9°C
(48°F)		2°C
(36°F)		-3°C
(28°F)
Daily mean-6°C
(21°F)		-6°C
(21°F)		-0°C
(32°F)		4°C
(39°F)		10°C
(50°F)		14°C
(58°F)		19°C
(66°F)		18°C
(65°F)		12°C
(54°F)		4°C
(40°F)		-1°C
(31°F)		-6°C
(22°F)
Average low-9°C
(15°F)		-10°C
(15°F)		-4°C
(25°F)		-1°C
(30°F)		4°C
(40°F)		8°C
(46°F)		11°C
(52°F)		11°C
(52°F)		7°C
(44°F)		-0°C
(32°F)		-4°C
(26°F)		-9°C
(16°F)
Mean minimum-23°C
(-10°F)		-22°C
(-8°F)		-13°C
(8°F)		-7°C
(19°F)		-2°C
(28°F)		2°C
(36°F)		6°C
(43°F)		5°C
(42°F)		0°C
(33°F)		-6°C
(21°F)		-10°C
(14°F)		-21°C
(-5°F)
Minimum-26°C
(-15°F)		-28°C
(-18°F)		-20°C
(-4°F)		-9°C
(16°F)		-4°C
(25°F)		-0°C
(32°F)		4°C
(40°F)		3°C
(37°F)		-2°C
(29°F)		-11°C
(12°F)		-14°C
(7°F)		-27°C
(-17°F)

Compare climate in Castlegar with other places

Compare temperature, precipitation, sunshine, UV index in Castlegar, Canada with other places around the world.

Monthly average precipitation in Castlegar, Canada

Castlegar usually has the most precipitation in March, November and December, with an average of 15 rainy days and 111 mm (4.4 inches) of precipitation per month. The driest months in Castlegar are July, August and September. On average, 46 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Castlegar. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)100 (4.0)88 (3.5)101 (4.0)92 (3.6)78 (3.1)70 (2.8)32 (1.3)37 (1.5)69 (2.7)92 (3.6)118 (4.6)114 (4.5)
Average precipitation days (≥ 1 mm)141415151213749121616

Monthly sunshine hours in Castlegar, Canada

The sunniest months in Castlegar are June, July and August, when the sun shines an average of 12 hours 1 minutes a day. Least sunny months in Castlegar: January, November and December receive an average of 3 hours 11 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Castlegar. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours83151208261323349403353267208108102
Mean daily daylight hours8h 42m10h 9m11h 56m13h 46m15h 21m16h 10m15h 43m14h 17m12h 31m10h 42m9h 4m8h 14m

Solar UV radiation in Castlegar, Canada

Castlegar experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 9 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Castlegar UV Index data.

Average daily maximum UV levels by month for Castlegar. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235799987421