The highest day temperature in January 2026 was 50°F. The lowest night temperature was -16°F. The average values for day and night temperatures during January were 20.5°F и 15.0°F respectivly.

The average sea surface temperature in January 2026 for Milwaukee was 36.1°F. The maximum and minimum values were 32.4°F and 38.6°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Milwaukee is 0.6 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 11.7 mph. It makes January one of the most windy months of the year for Milwaukee.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Milwaukee in January is 3.8 hours.