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Monthly climate in Arnprior, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arnprior features a humid continental climate (Dfb). Temperatures typically range between -9 °C (16 °F) and 21 °C (71 °F) through the year, but rarely can drop to -33 °C (-27 °F) or can rise to as high as 36 °C (98 °F). The average annual precipitation amounts to about 1113 mm (43.8 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually. Arnprior enjoys an average of 2708 hours of sunshine throughout the year, and daylight varies from 8 hours 45 minutes to 15 hours 35 minutes per day.

Monthly average temperatures in Arnprior, Canada

The warmest months in Arnprior are June, July and August, with daily mean temperatures ranging from 18 to 21 °C (65 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -6 °C (16 - 22 °F) throughout the day. On average each year, Arnprior experiences 54 days above 25 °C (77.0 °F) and 148 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arnprior. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(49°F)		11°C
(53°F)		21°C
(70°F)		28°C
(82°F)		35°C
(95°F)		34°C
(93°F)		36°C
(98°F)		32°C
(91°F)		33°C
(91°F)		27°C
(81°F)		22°C
(72°F)		15°C
(58°F)
Mean maximum5°C
(41°F)		8°C
(46°F)		13°C
(55°F)		21°C
(70°F)		30°C
(87°F)		31°C
(88°F)		33°C
(91°F)		31°C
(87°F)		29°C
(84°F)		23°C
(74°F)		14°C
(58°F)		9°C
(49°F)
Average high-5°C
(24°F)		-3°C
(28°F)		2°C
(37°F)		11°C
(51°F)		19°C
(66°F)		23°C
(75°F)		27°C
(81°F)		25°C
(77°F)		21°C
(70°F)		14°C
(57°F)		4°C
(40°F)		-2°C
(28°F)
Daily mean-9°C
(16°F)		-8°C
(18°F)		-3°C
(28°F)		5°C
(42°F)		13°C
(55°F)		18°C
(65°F)		21°C
(71°F)		20°C
(68°F)		15°C
(60°F)		9°C
(48°F)		0°C
(33°F)		-6°C
(22°F)
Average low-13°C
(8°F)		-13°C
(9°F)		-8°C
(19°F)		1°C
(33°F)		7°C
(45°F)		12°C
(54°F)		16°C
(60°F)		15°C
(59°F)		10°C
(51°F)		5°C
(41°F)		-4°C
(26°F)		-9°C
(15°F)
Mean minimum-27°C
(-17°F)		-26°C
(-14°F)		-22°C
(-7°F)		-7°C
(19°F)		-1°C
(30°F)		6°C
(43°F)		10°C
(51°F)		8°C
(47°F)		3°C
(38°F)		-3°C
(27°F)		-15°C
(6°F)		-22°C
(-8°F)
Minimum-33°C
(-27°F)		-28°C
(-18°F)		-26°C
(-15°F)		-13°C
(9°F)		-3°C
(26°F)		1°C
(35°F)		9°C
(48°F)		6°C
(44°F)		-0°C
(32°F)		-6°C
(22°F)		-22°C
(-8°F)		-30°C
(-21°F)

Compare climate in Arnprior with other places

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

Monthly average precipitation in Arnprior, Canada

Arnprior usually has the most precipitation in April, May and October, with an average of 12 rainy days and 116 mm (4.6 inches) of precipitation per month. The driest months in Arnprior are January, February and September. On average, 72 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arnprior. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)71 (2.8)75 (3.0)80 (3.1)110 (4.3)115 (4.5)95 (3.7)107 (4.2)101 (4.0)70 (2.8)125 (4.9)90 (3.5)76 (3.0)
Average precipitation days (≥ 1 mm)10121112131213139131412

Monthly sunshine hours in Arnprior, Canada

The sunniest months in Arnprior are June, July and August, when the sun shines an average of 10 hours 35 minutes a day. Least sunny months in Arnprior: January, November and December receive an average of 4 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arnprior. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours109161235228277310349314265192141122
Mean daily daylight hours9h 9m10h 23m11h 57m13h 33m14h 54m15h 35m15h 13m14h 0m12h 28m10h 53m9h 29m8h 45m

Solar UV radiation in Arnprior, Canada

Arnprior experiences the highest level of ultraviolet (UV) radiation in May, July and August, 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 / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Arnprior UV Index data.

Average daily maximum UV levels by month for Arnprior. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)245899997532