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Monthly climate in South Milwaukee, Wisconsin, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification South Milwaukee features a humid continental climate (Dfb). Temperatures typically range between -3 °C (27 °F) and 21 °C (70 °F) through the year, but rarely can drop to -25 °C (-12 °F) or can rise to as high as 28 °C (82 °F). The average annual precipitation amounts to about 1048 mm (41.3 inches) and receives 118 rainy days on the 1 mm (0.04 inches) threshold annually. South Milwaukee enjoys an average of 2945 hours of sunshine throughout the year, and daylight varies from 9 hours 3 minutes to 15 hours 16 minutes per day.

Monthly average temperatures in South Milwaukee, Wisconsin, United States §

The warmest months in South Milwaukee are July, August and September, with daily mean temperatures ranging from 18 to 21 °C (66 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 1 °C (27 - 34 °F) throughout the day. On average each year, South Milwaukee experiences 5 days above 25 °C (77.0 °F) and 86 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in South Milwaukee, 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 8°C
(46°F)		 10°C
(50°F)		 10°C
(50°F)		 14°C
(58°F)		 18°C
(64°F)		 25°C
(78°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(78°F)		 21°C
(70°F)		 15°C
(59°F)		 14°C
(57°F)
Mean maximum 6°C
(43°F)		 7°C
(45°F)		 9°C
(48°F)		 11°C
(52°F)		 15°C
(60°F)		 21°C
(70°F)		 26°C
(78°F)		 26°C
(79°F)		 24°C
(76°F)		 20°C
(68°F)		 12°C
(54°F)		 10°C
(50°F)
Average high -0°C
(31°F)		 -0°C
(32°F)		 3°C
(38°F)		 6°C
(43°F)		 10°C
(49°F)		 16°C
(61°F)		 21°C
(71°F)		 23°C
(73°F)		 20°C
(68°F)		 14°C
(57°F)		 6°C
(43°F)		 3°C
(37°F)
Daily mean -3°C
(27°F)		 -3°C
(28°F)		 1°C
(34°F)		 4°C
(39°F)		 8°C
(46°F)		 14°C
(58°F)		 20°C
(68°F)		 21°C
(70°F)		 18°C
(66°F)		 12°C
(54°F)		 4°C
(40°F)		 1°C
(34°F)
Average low -5°C
(24°F)		 -5°C
(23°F)		 -1°C
(31°F)		 2°C
(37°F)		 6°C
(43°F)		 13°C
(55°F)		 19°C
(66°F)		 20°C
(68°F)		 17°C
(63°F)		 10°C
(51°F)		 2°C
(37°F)		 -1°C
(31°F)
Mean minimum -16°C
(4°F)		 -16°C
(4°F)		 -9°C
(15°F)		 -2°C
(29°F)		 2°C
(37°F)		 9°C
(48°F)		 14°C
(58°F)		 17°C
(63°F)		 12°C
(54°F)		 4°C
(39°F)		 -4°C
(24°F)		 -10°C
(15°F)
Minimum -25°C
(-12°F)		 -23°C
(-9°F)		 -21°C
(-5°F)		 -6°C
(22°F)		 1°C
(34°F)		 4°C
(40°F)		 12°C
(53°F)		 15°C
(60°F)		 10°C
(51°F)		 2°C
(35°F)		 -8°C
(17°F)		 -16°C
(4°F)

Compare climate in South Milwaukee with other places

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

Monthly average precipitation in South Milwaukee, Wisconsin, United States §

South Milwaukee usually has the most precipitation in April, May and October, with an average of 12 rainy days and 132 mm (5.2 inches) of precipitation per month. The driest months in South Milwaukee are July, August and December. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in South Milwaukee, 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) 72 (2.8) 71 (2.8) 76 (3.0) 112 (4.4) 145 (5.7) 87 (3.4) 61 (2.4) 60 (2.4) 95 (3.7) 139 (5.5) 67 (2.6) 63 (2.5)
Average precipitation days (≥ 1 mm) 9 11 10 13 12 10 7 8 9 12 9 8

Monthly sunshine hours in South Milwaukee, Wisconsin, United States §

The sunniest months in South Milwaukee are June, July and August, when the sun shines an average of 11 hours 15 minutes a day. Least sunny months in South Milwaukee: January, February and December receive an average of 4 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in South Milwaukee, 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 111 176 243 256 293 326 365 342 285 210 180 151
Mean daily daylight hours 9h 25m 10h 32m 11h 57m 13h 25m 14h 39m 15h 16m 14h 56m 13h 50m 12h 26m 10h 59m 9h 42m 9h 3m

Solar UV radiation in South Milwaukee, Wisconsin, United States §

South Milwaukee 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 South Milwaukee UV Index data.

Average daily maximum UV levels by month for South Milwaukee, 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

Detailed Monthly Weather Insights for South Milwaukee, Wisconsin, United States

Discover in-depth weather details for every month in South Milwaukee. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about South Milwaukee's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.