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Monthly climate in Grand Forks, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Grand Forks features a humid continental climate (Dfb). Temperatures typically range between -5 °C (24 °F) and 20 °C (69 °F) through the year, but rarely can drop to -30 °C (-21 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 659 mm (25.9 inches) and receives 125 rainy days on the 1 mm (0.04 inches) threshold annually. Grand Forks enjoys an average of 2842 hours of sunshine throughout the year, and daylight varies from 8 hours 17 minutes to 16 hours 7 minutes per day.

Monthly average temperatures in Grand Forks, Canada

The warmest months in Grand Forks are June, July and August, with daily mean temperatures ranging from 16 to 20 °C (61 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -4 °C (24 - 26 °F) throughout the day. On average each year, Grand Forks experiences 50 days above 25 °C (77.0 °F) and 154 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grand Forks. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum5°C
(42°F)		10°C
(51°F)		17°C
(63°F)		23°C
(74°F)		27°C
(82°F)		41°C
(106°F)		40°C
(105°F)		37°C
(98°F)		32°C
(90°F)		24°C
(75°F)		12°C
(53°F)		12°C
(53°F)
Mean maximum4°C
(40°F)		6°C
(43°F)		13°C
(55°F)		19°C
(66°F)		26°C
(78°F)		29°C
(84°F)		35°C
(95°F)		35°C
(96°F)		29°C
(85°F)		18°C
(65°F)		10°C
(51°F)		6°C
(42°F)
Average high-1°C
(30°F)		-0°C
(32°F)		6°C
(43°F)		11°C
(52°F)		18°C
(64°F)		22°C
(72°F)		28°C
(82°F)		27°C
(81°F)		20°C
(68°F)		10°C
(51°F)		4°C
(39°F)		-1°C
(31°F)
Daily mean-5°C
(24°F)		-5°C
(24°F)		1°C
(34°F)		5°C
(42°F)		12°C
(53°F)		16°C
(61°F)		20°C
(69°F)		20°C
(68°F)		13°C
(57°F)		5°C
(42°F)		0°C
(33°F)		-4°C
(26°F)
Average low-8°C
(18°F)		-9°C
(15°F)		-3°C
(26°F)		0°C
(32°F)		5°C
(42°F)		9°C
(48°F)		12°C
(54°F)		12°C
(54°F)		8°C
(46°F)		1°C
(33°F)		-2°C
(28°F)		-7°C
(20°F)
Mean minimum-23°C
(-10°F)		-21°C
(-6°F)		-13°C
(9°F)		-5°C
(23°F)		-1°C
(31°F)		4°C
(39°F)		7°C
(45°F)		6°C
(43°F)		1°C
(34°F)		-6°C
(21°F)		-8°C
(18°F)		-19°C
(-1°F)
Minimum-28°C
(-18°F)		-30°C
(-21°F)		-23°C
(-9°F)		-6°C
(21°F)		-3°C
(27°F)		2°C
(36°F)		6°C
(43°F)		4°C
(39°F)		-1°C
(31°F)		-10°C
(15°F)		-13°C
(9°F)		-28°C
(-18°F)

Compare climate in Grand Forks with other places

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

Monthly average precipitation in Grand Forks, Canada

Grand Forks usually has the most precipitation in January, November and December, with an average of 14 rainy days and 72 mm (2.8 inches) of precipitation per month. The driest months in Grand Forks are June, July and August. On average, 25 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grand Forks. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)74 (2.9)59 (2.3)68 (2.7)69 (2.7)66 (2.6)45 (1.8)13 (0.5)18 (0.7)45 (1.8)59 (2.3)71 (2.8)72 (2.8)
Average precipitation days (≥ 1 mm)14121313109437111514

Monthly sunshine hours in Grand Forks, Canada

The sunniest months in Grand Forks are June, July and August, when the sun shines an average of 11 hours 56 minutes a day. Least sunny months in Grand Forks: January, November and December receive an average of 3 hours 19 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grand Forks. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours84156218264320346399352263213114105
Mean daily daylight hours8h 44m10h 10m11h 56m13h 45m15h 19m16h 7m15h 40m14h 16m12h 31m10h 43m9h 7m8h 17m

Solar UV radiation in Grand Forks, Canada

Grand Forks 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 Grand Forks UV Index data.

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