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.

Partly Cloudy

80°F

27°C

Humidity 57%
Wind Speed W 7 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 18 Aug 3:55 pm EDT
Extended Forecast for

Peru IN

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 80. Southwest wind around 5 mph.

    High: 80 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph.

    Low: 64 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 77. West wind around 5 mph. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Calm wind.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers. Partly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.

    High: 76 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Partly sunny, with a high near 80. Southwest wind around 5 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 77. West wind around 5 mph. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 58. Calm wind.
Thursday
Mostly sunny, with a high near 78. Calm wind.
Thursday Night
Mostly clear, with a low around 57.
Friday
Mostly sunny, with a high near 78.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 61.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 55.
Monday
A slight chance of showers. Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.76°N 86.07°W (Elev. 656 ft)
Last Update:
3:15 pm EDT Aug 18, 2026
Forecast Valid:
4pm EDT Aug 18, 2026-6pm EDT Aug 24, 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