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Southeast Wisconsin Weather Alert: Weekend Frost, 35° Low Oct 17
Milwaukee, WI – Chilly morning temperatures and the possibility of frost will follow a stretch of wet, windy weather in the Milwaukee area this weekend, with temperatures expected to fall near 35 degr
By Sophie Caldwell · 2026-10-15T08:17:55.085Z
Milwaukee, WI – Chilly morning temperatures and the possibility of frost will follow a stretch of wet, windy weather in the Milwaukee area this weekend, with temperatures expected to fall near 35 degrees early Saturday, Oct. 17. The National Weather Service forecasts areas of frost before 8 a.m. Saturday as clearing skies and colder air settle over southeastern Wisconsin. The change comes after widespread Thursday rainfall and Friday wind gusts reaching 40 mph, creating a notable shift in conditions for residents preparing for weekend activities.
According to the National Weather Service in Milwaukee, Thursday brings a 100% chance of precipitation, with showers developing mainly after 1 p.m. Rainfall between one half and three quarters of an inch is possible during the day, followed by additional showers Thursday night. Temperatures will reach approximately 58 degrees before falling toward 47 degrees as winds gradually shift northwest after midnight.
Frost Potential Develops After Rain and Gusty Winds The most significant weekend development arrives early Saturday, when temperatures are expected to reach approximately 35 degrees. The National Weather Service specifically forecasts areas of frost after 5 a.m. Friday night and before 8 a.m. Saturday, making the early morning period important for residents with gardens, outdoor plants and temperature sensitive vegetation.
Although the forecast low remains slightly above freezing, frost can develop on exposed surfaces when ground level temperatures fall below the official air temperature. Residents with vulnerable plants may want to consider protective coverings Friday evening, especially in sheltered locations where temperatures can fall more quickly.
Saturday afternoon brings improving conditions as sunshine returns and temperatures climb toward 56 degrees. Northwest winds of 5 to 10 mph will gradually become southwest during the afternoon, providing a calmer period after Friday's gustier weather. Clear skies Saturday night allow temperatures to fall toward 40 degrees, although the supplied forecast does not identify additional frost during that period.
Friday Winds Could Affect Travel Across Milwaukee Before the frost arrives, Friday will bring another round of showers and noticeably stronger winds. The National Weather Service forecasts a 70% precipitation chance, with showers likely before 3 p.m. and additional scattered activity possible later in the afternoon. Temperatures will reach approximately 55 degrees, while north winds of 15 to 25 mph could gust as high as 40 mph.
Those conditions could make travel more challenging along Interstate 94, Interstate 43, Interstate 41 and the Hoan Bridge, particularly for high profile vehicles exposed to stronger crosswinds. Rain may also reduce visibility during heavier showers, while wet pavement could affect stopping distances during commuting periods.
Friday evening brings gradual improvement as showers diminish and skies begin clearing. However, north winds of 15 to 20 mph could continue producing gusts as high as 35 mph before weakening after midnight. The combination of clearing skies and falling temperatures will help establish conditions favorable for Saturday morning frost.
Sunshine Returns as Temperatures Recover Sunday offers a more comfortable afternoon, with sunny skies and temperatures reaching approximately 61 degrees. Southwest winds of 10 to 20 mph could gust as high as 25 mph, creating breezy conditions despite the sunshine.
The warming trend continues Monday, with mostly sunny skies and highs near 62 degrees. Tuesday brings sunshine and temperatures around 63 degrees, followed by highs near 65 degrees Wednesday.
The weekend cooldown appears relatively brief, but Saturday morning's frost potential could be important for residents hoping to preserve sensitive outdoor plants before colder fall weather becomes more frequent.
Will you be protecting your plants from Saturday morning's frost, or are you looking forward to the cooler fall weather?
Five Day Weather Outlook Thursday 10/15: Showers develop mainly after 1 p.m., with a 100% precipitation chance and highs near 58 degrees; rainfall between one half and three quarters of an inch is possible before nighttime temperatures fall toward 47 degrees.
Friday 10/16: Showers remain likely with a 70% precipitation chance and highs near 55 degrees, while north winds gust up to 40 mph; skies gradually clear Friday night as temperatures fall near 35 degrees, with frost developing after 5 a.m.
Saturday 10/17: Areas of frost are expected before 8 a.m., followed by sunny skies and afternoon highs near 56 degrees; lighter winds provide improving conditions before clear skies return Saturday night with lows around 40 degrees.
Sunday 10/18: Sunny skies and warmer temperatures bring afternoon highs near 61 degrees, with southwest winds of 10 to 20 mph gusting up to 25 mph; mostly clear conditions continue Sunday night as temperatures fall toward 45 degrees.
Monday 10/19: Mostly sunny skies continue across Milwaukee, with afternoon highs near 62 degrees and improving conditions for outdoor activities; partly cloudy skies develop Monday night, with temperatures falling to approximately 46 degrees.
Extended Outlook: October 20 21 Tuesday is expected to bring sunny skies and afternoon highs near 63 degrees, followed by mostly clear conditions and nighttime lows around 48 degrees.
Wednesday continues the relatively mild pattern, with mostly sunny skies and highs approaching 65 degrees.