National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Grissom Air Force Base / Peru (KGUS)

Lat: 40.65°NLon: 86.15°WElev: 810ft.

Overcast

83°F

28°C

Humidity 62%
Wind Speed W 6 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 26 Jul 2:55 pm EDT
Extended Forecast for

Peru IN

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 87. West wind around 5 mph.

    High: 87 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly between 8am and 10am. Some of the storms could be severe. Partly sunny, with a high near 89. Heat index values as high as 97. Northwest wind 5 to 10 mph becoming southwest in the morning.

    High: 89 °F

    Chance
    Showers then
    Severe
    Thunderstorms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly before 2am. Some of the storms could be severe. Mostly cloudy, with a low around 70. Southwest wind 5 to 10 mph.

    Low: 70 °F

    Severe
    Thunderstorms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. North wind around 10 mph.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 87. West wind around 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 70. Calm wind.
Monday
A 30 percent chance of showers and thunderstorms, mainly between 8am and 10am. Some of the storms could be severe. Partly sunny, with a high near 89. Heat index values as high as 97. Northwest wind 5 to 10 mph becoming southwest in the morning.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly before 2am. Some of the storms could be severe. Mostly cloudy, with a low around 70. Southwest wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 82. North wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 63.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 83.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 65.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.76°N 86.07°W (Elev. 656 ft)
Last Update:
2:29 pm EDT Jul 26, 2026
Forecast Valid:
3pm EDT Jul 26, 2026-6pm EDT Aug 1, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation