Milwaukee rolled out of bed Sunday, April 19, 2026, to clear skies and air just a few degrees above freezing, with temperatures hovering near 36°F at General Mitchell International Airport. Lawns and unprotected plants in colder pockets are dealing with patchy frost through the early morning hours.
Clouds will mix in as the day goes on, with skies turning partly sunny and the high topping out near 46°F. A few light rain showers could slip through between about 11 a.m. and 4 p.m. West winds of 5 to 15 mph will add a chill, especially in more exposed neighborhoods and along the lakeshore. Drivers should be ready for a few slick, damp patches on bridges and overpasses if those spotty showers pass over the city.
Afternoon Winds Pick Up
By afternoon, winds swing more northwesterly, settling in around 10 to 15 mph across much of the area, with a few higher gusts possible near the lake. That will mean choppier nearshore waters and a noticeably breezier trip for cyclists and pedestrians on open routes.
Late Night Frost and Monday Morning
Temperatures slip back toward the freezing mark Sunday night, with widespread frost likely after about 2 a.m. Lows dip to around 31°F by early Monday. Monday itself looks brighter and a touch milder, with mostly sunny skies and highs near 48°F, so it is the overnight period when gardeners will want to protect any sensitive plants.
Quick Warm-Up Then A Showery End To Week
A sharper warm-up arrives Tuesday, April 21, as southerly winds pull in much milder air and push afternoon highs into the upper 60s. Forecasters note that a cold front Tuesday evening could knock temperatures down quickly and trigger a few storms. The end of the week turns more unsettled, with rain showers likely Thursday night and a better chance for showers and thunderstorms on Friday.
What Gardeners Should Know
For anyone itching to get flowers or vegetables in the ground, the National Weather Service frost maps put the median last freeze for much of Milwaukee around April 21, so another chilly night is still possible, and it is wise to cover vulnerable plants or hold off planting for a few more days. For context on this week’s earlier weather headaches, including low visibility and water issues, see our look at fog, flood fears and wild winds.
