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

3 Miles N Amboy IN

  • Today

    Today: Increasing clouds, with a high near 79. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 79 °F

    Increasing
    Clouds

  • Tonight

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

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 88. Heat index values as high as 96. Southwest wind around 5 mph.

    High: 88 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Southwest wind around 5 mph.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 90. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85.

    High: 85 °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 83.

    High: 83 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 79. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 88. Heat index values as high as 96. Southwest wind around 5 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Southwest wind around 5 mph.
Monday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 90. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Monday Night
A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 84.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 64.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Amboy IN
 40.64°N 85.94°W (Elev. 748 ft)
Last Update:
5:29 am EDT Jul 25, 2026
Forecast Valid:
8am 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