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.

Fair

70°F

21°C

Humidity 90%
Wind Speed SW 6 mph
Barometer 29.88 in (1011.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 26 Aug 8:55 pm EDT
Extended Forecast for

Grissom Air Force Base / Peru IN

  • Tonight

    Tonight: Partly cloudy, with a low around 63. West wind around 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. North wind around 5 mph becoming calm after midnight.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. Calm wind becoming north around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 63. West wind around 5 mph.
Thursday
Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 57. North wind around 5 mph becoming calm after midnight.
Friday
Sunny, with a high near 80. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Grissom Air Force Base / Peru IN
 40.65°N 86.14°W (Elev. 804 ft)
Last Update:
8:45 pm EDT Aug 26, 2026
Forecast Valid:
9pm EDT Aug 26, 2026-6pm EDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation