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Monthly climate in Superior, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Superior features a humid continental climate (Dfb).Temperatures typically range between -10 °C (14 °F) and 19 °C (67 °F) through the year, but rarely can drop to -32 °C (-25 °F) or can rise to as high as 28 °C (82 °F).The average annual precipitation amounts to about 951 mm (37.4 inches) and receives 113 rainy days on the 1 mm (0.04 inches) threshold annually.Superior enjoys an average of 2838 hours of sunshine throughout the year, and daylight varies from 8 hours 35 minutes to 15 hours 47 minutes per day.

Monthly average temperatures in Superior, Wisconsin, United States §

The warmest months in Superior are July, August and September, with daily mean temperatures ranging from 16 to 19 °C (62 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -5 °C (14 - 23 °F) throughout the day. On average each year, Superior experiences 6 days above 25 °C (77.0 °F) and 143 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Superior, 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 5°C
(41°F)		 8°C
(47°F)		 10°C
(51°F)		 18°C
(65°F)		 26°C
(79°F)		 28°C
(82°F)		 27°C
(82°F)		 27°C
(82°F)		 26°C
(80°F)		 22°C
(71°F)		 17°C
(63°F)		 9°C
(48°F)
Mean maximum 2°C
(37°F)		 3°C
(38°F)		 8°C
(47°F)		 14°C
(58°F)		 20°C
(69°F)		 24°C
(75°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(77°F)		 20°C
(69°F)		 11°C
(52°F)		 5°C
(42°F)
Average high -6°C
(21°F)		 -7°C
(21°F)		 1°C
(33°F)		 5°C
(41°F)		 12°C
(53°F)		 18°C
(64°F)		 22°C
(71°F)		 22°C
(72°F)		 19°C
(67°F)		 11°C
(52°F)		 3°C
(38°F)		 -2°C
(28°F)
Daily mean -10°C
(15°F)		 -10°C
(14°F)		 -3°C
(28°F)		 2°C
(35°F)		 8°C
(47°F)		 15°C
(59°F)		 19°C
(66°F)		 19°C
(67°F)		 16°C
(62°F)		 9°C
(48°F)		 1°C
(34°F)		 -5°C
(23°F)
Average low -13°C
(9°F)		 -14°C
(8°F)		 -6°C
(22°F)		 -1°C
(31°F)		 6°C
(42°F)		 12°C
(53°F)		 16°C
(62°F)		 17°C
(63°F)		 14°C
(58°F)		 7°C
(45°F)		 -1°C
(30°F)		 -8°C
(18°F)
Mean minimum -26°C
(-14°F)		 -26°C
(-15°F)		 -17°C
(2°F)		 -8°C
(19°F)		 1°C
(34°F)		 8°C
(47°F)		 13°C
(55°F)		 14°C
(57°F)		 8°C
(48°F)		 -0°C
(32°F)		 -9°C
(16°F)		 -21°C
(-5°F)
Minimum -31°C
(-24°F)		 -32°C
(-25°F)		 -22°C
(-8°F)		 -13°C
(9°F)		 -1°C
(30°F)		 5°C
(42°F)		 11°C
(53°F)		 13°C
(55°F)		 4°C
(39°F)		 -5°C
(24°F)		 -12°C
(11°F)		 -26°C
(-15°F)

Compare climate in Superior with other places

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

Monthly average precipitation in Superior, Wisconsin, United States §

Superior usually has the most precipitation in August, September and October, with an average of 12 rainy days and 127 mm (5.0 inches) of precipitation per month.The driest months in Superior are January, February and November. On average, 37 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Superior, 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) 25 (1.0) 33 (1.3) 53 (2.1) 74 (2.9) 94 (3.7) 76 (3.0) 95 (3.8) 109 (4.3) 119 (4.7) 153 (6.0) 52 (2.0) 67 (2.6)
Average precipitation days (≥ 1 mm) 6 7 6 10 11 9 8 11 12 13 10 10

Monthly sunshine hours in Superior, Wisconsin, United States §

The sunniest months in Superior are June, July and August, when the sun shines an average of 11 hours 0 minutes a day.Least sunny months in Superior: January, November and December receive an average of 4 hours 34 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Superior, 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 121 193 239 239 296 349 355 308 248 187 156 142
Mean daily daylight hours 9h 0m 10h 19m 11h 57m 13h 37m 15h 3m 15h 47m 15h 23m 14h 6m 12h 29m 10h 49m 9h 21m 8h 35m

Solar UV radiation in Superior, Wisconsin, United States §

Superior 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, February 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 Superior UV Index data.

Average daily maximum UV levels by month for Superior, 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 3 4 7 8 9 9 8 7 5 3 2