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

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 78. Southwest wind around 5 mph.

    High: 78 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm.

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 88. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon.

    High: 88 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny and hot, with a high near 90. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 2am. Partly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 78. Southwest wind around 5 mph.
Tonight
Mostly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm.
Sunday
Partly sunny, with a high near 88. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny and hot, with a high near 90. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Monday Night
Showers likely and possibly a thunderstorm before 2am. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 62.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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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:
1:45 pm EDT Jul 25, 2026
Forecast Valid:
2pm EDT Jul 25, 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