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Monthly climate in Portage, Wisconsin, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Portage features a humid continental climate (Dfb).Temperatures typically range between -6 °C (21 °F) and 23 °C (74 °F) through the year, but rarely can drop to -33 °C (-26 °F) or can rise to as high as 34 °C (94 °F).The average annual precipitation amounts to about 994 mm (39.1 inches) and receives 121 rainy days on the 1 mm (0.04 inches) threshold annually.Portage enjoys an average of 2909 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 20 minutes per day.

Monthly average temperatures in Portage, Wisconsin, United States §

The warmest months in Portage are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -2 °C (21 - 28 °F) throughout the day. On average each year, Portage experiences 72 days above 25 °C (77.0 °F) and 132 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Portage, 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 10°C
(49°F)		 20°C
(68°F)		 20°C
(69°F)		 26°C
(80°F)		 34°C
(93°F)		 34°C
(94°F)		 34°C
(94°F)		 33°C
(91°F)		 33°C
(92°F)		 30°C
(86°F)		 23°C
(73°F)		 18°C
(64°F)
Mean maximum 7°C
(45°F)		 12°C
(53°F)		 16°C
(62°F)		 24°C
(76°F)		 31°C
(88°F)		 32°C
(90°F)		 33°C
(92°F)		 31°C
(87°F)		 30°C
(86°F)		 28°C
(82°F)		 17°C
(62°F)		 13°C
(56°F)
Average high -3°C
(27°F)		 -1°C
(30°F)		 6°C
(44°F)		 12°C
(54°F)		 20°C
(68°F)		 26°C
(79°F)		 28°C
(83°F)		 27°C
(80°F)		 23°C
(74°F)		 15°C
(59°F)		 6°C
(43°F)		 1°C
(35°F)
Daily mean -6°C
(21°F)		 -6°C
(21°F)		 2°C
(35°F)		 7°C
(45°F)		 15°C
(59°F)		 21°C
(70°F)		 23°C
(74°F)		 21°C
(71°F)		 18°C
(65°F)		 10°C
(51°F)		 2°C
(36°F)		 -2°C
(28°F)
Average low -11°C
(13°F)		 -11°C
(13°F)		 -3°C
(27°F)		 2°C
(36°F)		 10°C
(50°F)		 16°C
(61°F)		 18°C
(65°F)		 16°C
(62°F)		 13°C
(55°F)		 6°C
(43°F)		 -2°C
(29°F)		 -6°C
(22°F)
Mean minimum -24°C
(-12°F)		 -24°C
(-12°F)		 -16°C
(3°F)		 -5°C
(22°F)		 1°C
(34°F)		 11°C
(53°F)		 14°C
(57°F)		 10°C
(51°F)		 5°C
(42°F)		 -4°C
(26°F)		 -11°C
(13°F)		 -17°C
(2°F)
Minimum -33°C
(-26°F)		 -32°C
(-26°F)		 -24°C
(-12°F)		 -12°C
(12°F)		 -2°C
(29°F)		 7°C
(45°F)		 12°C
(54°F)		 8°C
(46°F)		 1°C
(35°F)		 -5°C
(23°F)		 -15°C
(5°F)		 -23°C
(-9°F)

Compare climate in Portage with other places

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

Monthly average precipitation in Portage, Wisconsin, United States §

Portage usually has the most precipitation in May, June and October, with an average of 13 rainy days and 117 mm (4.6 inches) of precipitation per month.The driest months in Portage are January, November and December. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Portage, 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) 46 (1.8) 53 (2.1) 58 (2.3) 95 (3.8) 127 (5.0) 113 (4.4) 95 (3.7) 105 (4.1) 101 (4.0) 111 (4.4) 44 (1.7) 45 (1.8)
Average precipitation days (≥ 1 mm) 8 8 9 12 13 13 11 11 10 13 7 6

Monthly sunshine hours in Portage, Wisconsin, United States §

The sunniest months in Portage are June, July and August, when the sun shines an average of 11 hours 2 minutes a day.Least sunny months in Portage: January, November and December receive an average of 5 hours 15 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Portage, 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 126 196 232 238 274 330 356 329 263 203 184 172
Mean daily daylight hours 9h 22m 10h 31m 11h 58m 13h 26m 14h 42m 15h 20m 14h 59m 13h 52m 12h 26m 10h 57m 9h 40m 9h 0m

Solar UV radiation in Portage, Wisconsin, United States §

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

Average daily maximum UV levels by month for Portage, 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 8 9 10 10 9 7 5 3 2