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Monthly climate in Grantsburg, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Grantsburg features a humid continental climate (Dfb).Temperatures typically range between -10 °C (15 °F) and 23 °C (73 °F) through the year, but rarely can drop to -36 °C (-33 °F) or can rise to as high as 36 °C (98 °F).The average annual precipitation amounts to about 885 mm (34.9 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually.Grantsburg enjoys an average of 2870 hours of sunshine throughout the year, and daylight varies from 8 hours 43 minutes to 15 hours 38 minutes per day.

Monthly average temperatures in Grantsburg, Wisconsin, United States §

The warmest months in Grantsburg are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -6 °C (15 - 22 °F) throughout the day. On average each year, Grantsburg experiences 65 days above 25 °C (77.0 °F) and 145 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grantsburg, Wisconsin, 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 7°C
(45°F)		 14°C
(58°F)		 21°C
(70°F)		 28°C
(83°F)		 34°C
(94°F)		 36°C
(98°F)		 35°C
(95°F)		 32°C
(91°F)		 32°C
(90°F)		 27°C
(80°F)		 23°C
(74°F)		 14°C
(57°F)
Mean maximum 4°C
(40°F)		 7°C
(45°F)		 16°C
(60°F)		 22°C
(73°F)		 30°C
(85°F)		 32°C
(89°F)		 33°C
(92°F)		 31°C
(88°F)		 30°C
(87°F)		 25°C
(77°F)		 14°C
(58°F)		 9°C
(49°F)
Average high -5°C
(23°F)		 -4°C
(25°F)		 5°C
(40°F)		 11°C
(52°F)		 20°C
(68°F)		 26°C
(79°F)		 28°C
(82°F)		 26°C
(79°F)		 22°C
(72°F)		 13°C
(55°F)		 3°C
(38°F)		 -2°C
(29°F)
Daily mean -10°C
(15°F)		 -9°C
(16°F)		 -0°C
(32°F)		 6°C
(42°F)		 14°C
(58°F)		 21°C
(70°F)		 23°C
(73°F)		 21°C
(70°F)		 17°C
(63°F)		 8°C
(47°F)		 -0°C
(32°F)		 -6°C
(22°F)
Average low -14°C
(7°F)		 -15°C
(6°F)		 -5°C
(24°F)		 1°C
(33°F)		 9°C
(49°F)		 15°C
(60°F)		 17°C
(64°F)		 16°C
(61°F)		 12°C
(54°F)		 5°C
(41°F)		 -4°C
(25°F)		 -10°C
(15°F)
Mean minimum -28°C
(-18°F)		 -29°C
(-19°F)		 -18°C
(0°F)		 -9°C
(16°F)		 1°C
(35°F)		 10°C
(50°F)		 11°C
(52°F)		 10°C
(51°F)		 4°C
(40°F)		 -4°C
(25°F)		 -14°C
(7°F)		 -24°C
(-11°F)
Minimum -33°C
(-28°F)		 -36°C
(-33°F)		 -27°C
(-16°F)		 -19°C
(-2°F)		 -2°C
(29°F)		 6°C
(44°F)		 9°C
(48°F)		 10°C
(50°F)		 0°C
(33°F)		 -9°C
(16°F)		 -16°C
(4°F)		 -27°C
(-17°F)

Compare climate in Grantsburg with other places

Compare temperature, precipitation, sunshine, UV index in Grantsburg, Wisconsin, United States with other places around the world.

Monthly average precipitation in Grantsburg, Wisconsin, United States §

Grantsburg usually has the most precipitation in May, July and August, with an average of 11 rainy days and 110 mm (4.3 inches) of precipitation per month.The driest months in Grantsburg are January, February and November. On average, 30 mm (1.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grantsburg, Wisconsin, 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) 20 (0.8) 30 (1.2) 47 (1.8) 89 (3.5) 104 (4.1) 80 (3.2) 100 (4.0) 127 (5.0) 96 (3.8) 100 (3.9) 38 (1.5) 54 (2.1)
Average precipitation days (≥ 1 mm) 5 6 7 10 11 10 10 12 10 10 8 8

Monthly sunshine hours in Grantsburg, Wisconsin, United States §

The sunniest months in Grantsburg are June, July and August, when the sun shines an average of 10 hours 59 minutes a day.Least sunny months in Grantsburg: January, November and December receive an average of 4 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grantsburg, Wisconsin, 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 132 199 232 232 285 344 357 309 248 203 166 158
Mean daily daylight hours 9h 7m 10h 22m 11h 57m 13h 34m 14h 57m 15h 38m 15h 15m 14h 1m 12h 28m 10h 51m 9h 27m 8h 43m

Solar UV radiation in Grantsburg, Wisconsin, United States §

Grantsburg experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, 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 Grantsburg UV Index data.

Average daily maximum UV levels by month for Grantsburg, Wisconsin, 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 9 10 9 9 7 5 3 2