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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Peru IN

  • Tonight

    Tonight: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 89. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon.

    High: 89 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny and hot, with a high near 91. Chance of precipitation is 30%.

    High: 91 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 10 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 65.

    Low: 65 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 57. Calm wind.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm.
Sunday
Partly sunny, with a high near 89. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 20%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny and hot, with a high near 91. Chance of precipitation is 30%.
Monday Night
A 50 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 71.
Tuesday
A 10 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 88.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 85.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 63.
Thursday
A 10 percent chance of showers and thunderstorms. Sunny, with a high near 86.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 65.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.78°N 86.04°W (Elev. 696 ft)
Last Update:
9:32 am EDT Jul 24, 2026
Forecast Valid:
6pm EDT Jul 24, 2026-6pm EDT Jul 31, 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