If you're looking for summer vibes, the best time to travel to Milwaukee, WI is in July, August and September, when the average temperature reaches 19.77 °C, while July, August and September are the 3 sunniest months of the year, with an average of 87.39 hours.
If you prefer colder temperatures, however, make sure you visit Milwaukee, WI during the months of January, February and March to experience an average of -3.47 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and March, when the average precipitation in Milwaukee, WI is 4.5 mm, while the months of January, February and March are drier, with an average of 0 mm.