National Weather Service Forecast for: Waukesha WI
Issued by: National Weather Service Milwaukee, WI
Updated: 8:12 pm CST Dec 17, 2025
 
Tonight

Tonight: Rain likely, mainly after 5am.  Mostly cloudy, with a temperature rising to around 39 by 5am. South wind 10 to 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy
then Rain
Likely

Thursday

Thursday: Rain before 2pm, then a chance of snow showers after 5pm.  Temperature rising to near 42 by 9am, then falling to around 31 during the remainder of the day. Breezy, with a south wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 35 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.
Rain then
Chance
Rain/Snow and
Breezy
Thursday
Night
Thursday Night: Snow showers likely, mainly before 9pm, then a slight chance of snow after midnight.  Mostly cloudy, with a low around 8. Wind chill values between -10 and zero. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Breezy. Snow
Showers
Likely then
Slight Chance
Snow
Friday

Friday: Mostly sunny, with a high near 23. Wind chill values between -10 and zero. Breezy, with a west wind 15 to 20 mph becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph.
Mostly Sunny
and Breezy
then Mostly
Sunny
Friday
Night
Friday Night: Mostly cloudy, with a temperature rising to around 28 by 5am. South wind 5 to 10 mph.
Mostly Cloudy


Saturday

Saturday: A slight chance of rain and snow before noon, then a slight chance of snow.  Mostly cloudy, with a high near 37. South wind 10 to 15 mph becoming west in the afternoon.  Chance of precipitation is 20%.
Slight Chance
Rain/Snow
then Slight
Chance Snow
Saturday
Night
Saturday Night: Mostly clear, with a low around 9. West wind 10 to 15 mph.
Mostly Clear


Sunday

Sunday: Sunny, with a high near 22. West wind 5 to 10 mph.
Sunny


Sunday
Night
Sunday Night: Partly cloudy, with a steady temperature around 17.
Partly Cloudy


Lo 31 °F Hi 42 °F Lo 8 °F Hi 23 °F Lo 19 °F Hi 37 °F Lo 9 °F Hi 22 °F Lo 17 °F

 

Tonight
 
Rain likely, mainly after 5am. Mostly cloudy, with a temperature rising to around 39 by 5am. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
 
Rain before 2pm, then a chance of snow showers after 5pm. Temperature rising to near 42 by 9am, then falling to around 31 during the remainder of the day. Breezy, with a south wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday Night
 
Snow showers likely, mainly before 9pm, then a slight chance of snow after midnight. Mostly cloudy, with a low around 8. Wind chill values between -10 and zero. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
 
Mostly sunny, with a high near 23. Wind chill values between -10 and zero. Breezy, with a west wind 15 to 20 mph becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
 
Mostly cloudy, with a temperature rising to around 28 by 5am. South wind 5 to 10 mph.
Saturday
 
A slight chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 37. South wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 20%.
Saturday Night
 
Mostly clear, with a low around 9. West wind 10 to 15 mph.
Sunday
 
Sunny, with a high near 22. West wind 5 to 10 mph.
Sunday Night
 
Partly cloudy, with a steady temperature around 17.
Monday
 
Mostly cloudy, with a high near 35.
Monday Night
 
Mostly cloudy, with a low around 29.
Tuesday
 
Partly sunny, with a high near 40.
Tuesday Night
 
Mostly cloudy, with a low around 24.
Wednesday
 
Mostly cloudy, with a high near 36.

 

Forecast from NOAA-NWS for Waukesha WI.