National Weather Service Forecast for: Elgin IL
Issued by: National Weather Service Chicago, IL
Updated: 2:41 am CDT Jun 30, 2026
 
Today

Today: Mostly sunny, with a high near 93. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Mostly Sunny

 Tonight

Tonight: Mostly clear, with a low around 76. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Hot

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 94. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny

 Thursday
Night
Thursday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 74. Chance of precipitation is 60%.
Slight Chance
T-storms then
Showers
Likely
 Friday

Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.
Showers
Likely

 Friday
Night
Friday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71.
Chance
T-storms

 Independence
Day
Independence Day: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 89.
Chance
Showers then
Chance
T-storms
Hi 93 °F Lo 76 °F Hi 95 °F Lo 77 °F Hi 94 °F Lo 74 °F Hi 92 °F Lo 71 °F Hi 89 °F

Hazardous Weather Outlook
Extreme Heat Warning
 

Today
 
 Mostly sunny, with a high near 93. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
 
 Mostly clear, with a low around 76. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Wednesday
 
 Sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
 
 Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
 
 Sunny, with a high near 94. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
 
 A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 74. Chance of precipitation is 60%.
Friday
 
 Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.
Friday Night
 
 A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71.
Independence Day
 
 A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 89.
Saturday Night
 
 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 87.
Sunday Night
 
 Partly cloudy, with a low around 66.
Monday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Elgin IL.