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

Hazardous Weather Conditions

Current conditions at

Grissom Air Force Base / Peru (KGUS)

Lat: 40.65°NLon: 86.15°WElev: 810ft.

Mostly Cloudy

77°F

25°C

Humidity 79%
Wind Speed E 8 mph
Barometer 29.94 in (1013.5 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 3 Sep 7:55 pm EDT
Extended Forecast for

Peru IN

Heat Advisory September 3, 08:36pm until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 3, 08:36pm until September 4, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 72 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 91. Heat index values as high as 101. West wind around 5 mph.

    High: 91 °F

    Hot

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm after midnight.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. Heat index values as high as 95. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 62. East wind around 5 mph. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 72. South wind around 5 mph.
Friday
Mostly sunny and hot, with a high near 91. Heat index values as high as 101. West wind around 5 mph.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm after midnight.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. Heat index values as high as 95. Calm wind becoming northeast around 5 mph in the afternoon.
Saturday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 62. East wind around 5 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 58.
Labor Day
Sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 69.
Thursday
A slight chance of showers. Mostly sunny, with a high near 85.
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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:
8:16 pm EDT Sep 3, 2026
Forecast Valid:
8pm EDT Sep 3, 2026-6pm EDT Sep 10, 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