National Weather Service Forecast for: Valparaiso IN
Issued by: National Weather Service Chicago, IL
Updated: 1:21 am CDT Jun 30, 2026
 
Overnight

Overnight: Mostly clear, with a low around 76. South southwest wind around 10 mph, with gusts as high as 15 mph.
Mostly Clear
 Tuesday

Tuesday: Mostly sunny, with a high near 93. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 76. Southwest wind 5 to 15 mph, with gusts as high as 30 mph.
Clear
 Wednesday

Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Hot
 Wednesday
Night
Wednesday Night: Clear, with a low around 76. South southwest wind around 10 mph, with gusts as high as 20 mph.
Clear
 Thursday

Thursday: Sunny, with a high near 93.
Sunny
 Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 73.
Chance
T-storms
 Friday

Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90.
Showers
Likely
 Friday
Night
Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Chance
T-storms
Lo 76 °F Hi 93 °F Lo 76 °F Hi 95 °F Lo 76 °F Hi 93 °F Lo 73 °F Hi 90 °F Lo 71 °F

Heat Advisory
Hazardous Weather Outlook
 

Overnight
 
 Mostly clear, with a low around 76. South southwest wind around 10 mph, with gusts as high as 15 mph.
Tuesday
 
 Mostly sunny, with a high near 93. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
 
 Clear, with a low around 76. Southwest wind 5 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 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
 
 Clear, with a low around 76. South southwest wind around 10 mph, with gusts as high as 20 mph.
Thursday
 
 Sunny, with a high near 93.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 73.
Friday
 
 Showers likely, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90.
Friday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Independence Day
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Saturday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Sunday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 85.
Sunday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Monday
 
 Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Valparaiso IN.