The highest day temperature in May 2026 was 79°F. The lowest night temperature was 32°F. The average values for day and night temperatures during May were 61.5°F и 48.6°F respectivly.

The average sea surface temperature in May 2026 for Milwaukee was 47.2°F. The maximum and minimum values were 43.4°F and 53.2°F respectively.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Milwaukee is 1.1 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 9.2 mph. It makes May one of the most windless 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 May is 8.3 hours.