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Monthly climate in Altona, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Altona features a humid continental climate (Dfb). Temperatures typically range between -15 °C (6 °F) and 22 °C (71 °F) through the year, but rarely can drop to -39 °C (-37 °F) or can rise to as high as 40 °C (105 °F). The average annual precipitation amounts to about 517 mm (20.3 inches) and receives 80 rainy days on the 1 mm (0.04 inches) threshold annually. Altona enjoys an average of 3026 hours of sunshine throughout the year, and daylight varies from 8 hours 16 minutes to 16 hours 7 minutes per day.

Monthly average temperatures in Altona, Canada

The warmest months in Altona are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (67 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -15 to -9 °C (6 - 16 °F) throughout the day. On average each year, Altona experiences 61 days above 25 °C (77.0 °F) and 172 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Altona. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum6°C
(42°F)		8°C
(46°F)		21°C
(71°F)		24°C
(76°F)		32°C
(90°F)		40°C
(105°F)		34°C
(94°F)		37°C
(98°F)		35°C
(95°F)		29°C
(85°F)		22°C
(71°F)		7°C
(46°F)
Mean maximum3°C
(37°F)		3°C
(37°F)		11°C
(52°F)		20°C
(67°F)		29°C
(84°F)		32°C
(89°F)		33°C
(91°F)		34°C
(93°F)		31°C
(89°F)		24°C
(76°F)		11°C
(53°F)		6°C
(42°F)
Average high-9°C
(16°F)		-10°C
(15°F)		0°C
(32°F)		8°C
(48°F)		19°C
(66°F)		25°C
(78°F)		27°C
(81°F)		26°C
(79°F)		20°C
(69°F)		11°C
(51°F)		0°C
(33°F)		-5°C
(23°F)
Daily mean-13°C
(9°F)		-15°C
(6°F)		-5°C
(24°F)		3°C
(37°F)		13°C
(55°F)		20°C
(67°F)		22°C
(71°F)		20°C
(68°F)		14°C
(58°F)		6°C
(43°F)		-4°C
(25°F)		-9°C
(16°F)
Average low-17°C
(1°F)		-19°C
(-3°F)		-10°C
(15°F)		-3°C
(28°F)		6°C
(44°F)		14°C
(57°F)		16°C
(61°F)		13°C
(56°F)		9°C
(49°F)		2°C
(35°F)		-8°C
(18°F)		-14°C
(8°F)
Mean minimum-33°C
(-27°F)		-31°C
(-24°F)		-24°C
(-11°F)		-13°C
(9°F)		-3°C
(27°F)		7°C
(44°F)		10°C
(49°F)		7°C
(45°F)		1°C
(34°F)		-8°C
(19°F)		-19°C
(-2°F)		-28°C
(-17°F)
Minimum-38°C
(-36°F)		-39°C
(-37°F)		-29°C
(-19°F)		-19°C
(-2°F)		-6°C
(21°F)		3°C
(38°F)		7°C
(45°F)		6°C
(43°F)		-2°C
(28°F)		-9°C
(16°F)		-23°C
(-9°F)		-33°C
(-26°F)

Compare climate in Altona with other places

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

Monthly average precipitation in Altona, Canada

Altona usually has the most precipitation in June, September and October, with an average of 9 rainy days and 74 mm (2.9 inches) of precipitation per month. The driest months in Altona are January, February and March. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Altona. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)16 (0.6)17 (0.7)19 (0.7)25 (1.0)46 (1.8)73 (2.9)59 (2.3)58 (2.3)78 (3.1)72 (2.8)27 (1.1)27 (1.1)
Average precipitation days (≥ 1 mm)4545810779957

Monthly sunshine hours in Altona, Canada

The sunniest months in Altona are June, July and August, when the sun shines an average of 11 hours 32 minutes a day. Least sunny months in Altona: January, November and December receive an average of 5 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Altona. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours140208250276312352381328254196160165
Mean daily daylight hours8h 44m10h 10m11h 56m13h 45m15h 20m16h 7m15h 41m14h 16m12h 31m10h 43m9h 6m8h 16m

Solar UV radiation in Altona, Canada

Altona experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 8 - 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 Altona UV Index data.

Average daily maximum UV levels by month for Altona. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)245789887422