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National Weather Service Forecast for: Plainfield, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: 07/01/2026 1:51pm

Westmont, Illinois
 
This
Afternoon
This Afternoon: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Independence
Day
Independence Day: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday

Monday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Tuesday

Tuesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
 
Hi 91 °F Hi 93 °F Hi 90 °F Hi 87 °F Hi 86 °F Hi 86 °F Hi 87 °F  
 
Tonight

Tonight: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday
Night
Friday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Saturday
Night
Saturday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
 
Lo 75 °F Lo 74 °F Lo 72 °F Lo 69 °F Lo 67 °F Lo 66 °F Lo 68 °F  

Extreme Heat Warning issued July 1 at 9:56AM CDT until July 3 at 12:00AM CDT
 

This Afternoon
 
Sunny, with a high near 91. Heat index values as high as 101. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
 
Mostly clear, with a low around 75. Heat index values as high as 99. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
 
Sunny. High near 93, with temperatures falling to around 91 in the afternoon. Heat index values as high as 102. South southwest wind 5 to 15 mph.
Thursday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 74. Heat index values as high as 98. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Friday
 
Showers and thunderstorms likely. Mostly sunny, with a high near 90. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Friday Night
 
Showers and thunderstorms likely. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
Independence Day
 
Showers and thunderstorms likely. Partly sunny, with a high near 87.
Saturday Night
 
Showers and thunderstorms likely before 7pm, then showers and thunderstorms likely between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Monday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Monday Night
 
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 66.
Tuesday
 
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
Tuesday Night
 
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 68.

 

Forecast from NOAA-NWS for Plainfield, IL.

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