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.

Fair

91°F

33°C

Humidity 59%
Wind Speed SW 9 mph
Barometer 29.98 in (1014.5 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 1 Sep 5:55 pm EDT
Extended Forecast for

Peru IN

Heat Advisory September 1, 07:04pm until September 2, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 1, 07:04pm until September 2, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Tonight

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 94. Heat index values as high as 106. Southwest wind 5 to 10 mph.

    High: 94 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. Southwest wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 93. Heat index values as high as 102. West wind around 5 mph.

    High: 93 °F

    Hot

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 70. Chance of precipitation is 40%.

    Low: 70 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 73. Southwest wind around 5 mph.
Wednesday
Sunny and hot, with a high near 94. Heat index values as high as 106. Southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 74. Southwest wind around 5 mph.
Thursday
Sunny and hot, with a high near 93. Heat index values as high as 102. West wind around 5 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly clear, with a low around 72. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny and hot, with a high near 90.
Friday Night
A slight chance of showers before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 70. Chance of precipitation is 40%.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 62.
Labor Day
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.75°N 86.04°W (Elev. 646 ft)
Last Update:
3:46 pm EDT Sep 1, 2026
Forecast Valid:
7pm EDT Sep 1, 2026-6pm EDT Sep 8, 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