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Monthly climate in Grand Forks, North Dakota, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Grand Forks features a humid continental climate (Dfb).Temperatures typically range between -14 °C (8 °F) and 22 °C (72 °F) through the year, but rarely can drop to -39 °C (-38 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 585 mm (23.0 inches) and receives 82 rainy days on the 1 mm (0.04 inches) threshold annually.Grand Forks enjoys an average of 3021 hours of sunshine throughout the year, and daylight varies from 8 hours 26 minutes to 15 hours 57 minutes per day.

Monthly average temperatures in Grand Forks, North Dakota, United States §

The warmest months in Grand Forks are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (68 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -14 to -9 °C (8 - 17 °F) throughout the day. On average each year, Grand Forks experiences 63 days above 25 °C (77.0 °F) and 164 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, North Dakota, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 4°C
(39°F)		 8°C
(47°F)		 22°C
(72°F)		 24°C
(75°F)		 33°C
(92°F)		 40°C
(105°F)		 35°C
(96°F)		 36°C
(96°F)		 32°C
(90°F)		 29°C
(84°F)		 22°C
(72°F)		 9°C
(48°F)
Mean maximum 3°C
(37°F)		 3°C
(38°F)		 11°C
(53°F)		 21°C
(70°F)		 29°C
(85°F)		 32°C
(90°F)		 33°C
(92°F)		 33°C
(92°F)		 31°C
(88°F)		 24°C
(76°F)		 12°C
(54°F)		 6°C
(43°F)
Average high -8°C
(17°F)		 -9°C
(17°F)		 1°C
(35°F)		 9°C
(49°F)		 19°C
(67°F)		 26°C
(79°F)		 28°C
(82°F)		 26°C
(79°F)		 21°C
(70°F)		 11°C
(52°F)		 1°C
(34°F)		 -4°C
(24°F)
Daily mean -13°C
(9°F)		 -14°C
(8°F)		 -3°C
(26°F)		 4°C
(39°F)		 13°C
(56°F)		 20°C
(69°F)		 22°C
(72°F)		 20°C
(68°F)		 15°C
(60°F)		 6°C
(44°F)		 -3°C
(27°F)		 -9°C
(17°F)
Average low -17°C
(1°F)		 -19°C
(-2°F)		 -8°C
(18°F)		 -1°C
(30°F)		 7°C
(45°F)		 14°C
(58°F)		 17°C
(62°F)		 14°C
(58°F)		 10°C
(50°F)		 2°C
(36°F)		 -7°C
(19°F)		 -13°C
(9°F)
Mean minimum -34°C
(-29°F)		 -32°C
(-26°F)		 -22°C
(-7°F)		 -11°C
(12°F)		 -2°C
(29°F)		 8°C
(46°F)		 10°C
(51°F)		 8°C
(47°F)		 2°C
(35°F)		 -8°C
(19°F)		 -18°C
(0°F)		 -29°C
(-20°F)
Minimum -39°C
(-38°F)		 -35°C
(-31°F)		 -27°C
(-17°F)		 -16°C
(4°F)		 -5°C
(24°F)		 6°C
(42°F)		 9°C
(48°F)		 6°C
(44°F)		 -3°C
(28°F)		 -10°C
(14°F)		 -22°C
(-8°F)		 -34°C
(-29°F)

Compare climate in Grand Forks with other places

Compare temperature, precipitation, sunshine, UV index in Grand Forks, North Dakota, United States with other places around the world.

Monthly average precipitation in Grand Forks, North Dakota, United States §

Grand Forks usually has the most precipitation in June, August and October, with an average of 8 rainy days and 80 mm (3.1 inches) of precipitation per month.The driest months in Grand Forks are January, February and March. On average, 21 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grand Forks, North Dakota, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 18 (0.7) 20 (0.8) 24 (1.0) 35 (1.4) 55 (2.2) 83 (3.3) 59 (2.3) 76 (3.0) 73 (2.9) 80 (3.1) 26 (1.0) 36 (1.4)
Average precipitation days (≥ 1 mm) 4 5 5 5 8 9 8 8 9 9 5 7

Monthly sunshine hours in Grand Forks, North Dakota, United States §

The sunniest months in Grand Forks are June, July and August, when the sun shines an average of 11 hours 26 minutes a day.Least sunny months in Grand Forks: January, November and December receive an average of 5 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grand Forks, North Dakota, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 144 207 249 265 311 354 374 322 255 200 169 166
Mean daily daylight hours 8h 52m 10h 14m 11h 56m 13h 41m 15h 11m 15h 57m 15h 31m 14h 11m 12h 30m 10h 46m 9h 14m 8h 26m

Solar UV radiation in Grand Forks, North Dakota, United States §

Grand Forks experiences the highest level of ultraviolet (UV) radiation in June, July 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 Grand Forks UV Index data.

Average daily maximum UV levels by month for Grand Forks, North Dakota, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 5 7 8 9 9 8 7 4 2 2