National Weather Service Forecast for: Portage MI
Issued by: National Weather Service Grand Rapids, MI
Updated: 3:37 am EDT Jun 30, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 74. South southwest wind around 6 mph.
Partly Cloudy

Tuesday

Tuesday: Sunny and hot, with a high near 94. Heat index values as high as 105. Southwest wind 8 to 13 mph, with gusts as high as 26 mph.
Hot

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 75. Southwest wind 7 to 10 mph, with gusts as high as 25 mph.
Mostly Clear

Wednesday

Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 103. West southwest wind 7 to 10 mph, with gusts as high as 23 mph.
Hot

Wednesday
Night
Wednesday Night: Clear, with a low around 75. Southwest wind 8 to 11 mph, with gusts as high as 25 mph.
Clear

Thursday

Thursday: Sunny and hot, with a high near 94.
Hot

Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms after 2am.  Partly cloudy, with a low around 71.
Partly Cloudy
then Chance
T-storms
Friday

Friday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 91.
Chance
T-storms
Friday
Night
Friday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 68.
Chance
T-storms
Lo 74 °F Hi 94 °F Lo 75 °F Hi 95 °F Lo 75 °F Hi 94 °F Lo 71 °F Hi 91 °F Lo 68 °F

Extreme Heat Warning
 

Overnight
 
Partly cloudy, with a low around 74. South southwest wind around 6 mph.
Tuesday
 
Sunny and hot, with a high near 94. Heat index values as high as 105. Southwest wind 8 to 13 mph, with gusts as high as 26 mph.
Tuesday Night
 
Mostly clear, with a low around 75. Southwest wind 7 to 10 mph, with gusts as high as 25 mph.
Wednesday
 
Sunny and hot, with a high near 95. Heat index values as high as 103. West southwest wind 7 to 10 mph, with gusts as high as 23 mph.
Wednesday Night
 
Clear, with a low around 75. Southwest wind 8 to 11 mph, with gusts as high as 25 mph.
Thursday
 
Sunny and hot, with a high near 94.
Thursday Night
 
A 30 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 71.
Friday
 
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.
Friday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Independence Day
 
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87.
Saturday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Sunday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Monday
 
Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Portage MI.