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.

Mostly Cloudy

72°F

22°C

Humidity 81%
Wind Speed W 9 mph
Barometer 29.94 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 25 Jun 9:55 am EDT
Extended Forecast for

Peru IN

  • Today

    Today: Isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 80. West wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 80 °F

    Partly Sunny
    then Isolated
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. Northwest wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: Rain likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 74. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 74 °F

    Rain Likely

  • Friday Night

    Friday Night: Rain likely and possibly a thunderstorm before 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 63. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

    Low: 63 °F

    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers before 8am. Mostly cloudy, with a high near 80. East wind around 5 mph.

    High: 80 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A 10 percent chance of showers and thunderstorms before 8am. Partly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 92.

    High: 92 °F

    Hot

Detailed Forecast

Today
Isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 80. West wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 60. Northwest wind around 5 mph becoming calm in the evening.
Friday
Rain likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 74. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain likely and possibly a thunderstorm before 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 63. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
Saturday
A 30 percent chance of showers before 8am. Mostly cloudy, with a high near 80. East wind around 5 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 64.
Sunday
A 10 percent chance of showers and thunderstorms before 8am. Partly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 71.
Monday
Mostly sunny and hot, with a high near 92.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Sunny and hot, with a high near 93.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny and hot, with a high near 94.
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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:
6:46 am EDT Jun 25, 2026
Forecast Valid:
10am EDT Jun 25, 2026-6pm EDT Jul 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