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

48°F

9°C

Humidity 45%
Wind Speed Calm
Barometer 30.03 in (1017.5 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 22 Nov 2:55 pm EST
Extended Forecast for

Grissom Air Force Base / Peru IN

  • This Afternoon

    This Afternoon: Sunny, with a high near 49. Calm wind becoming west around 5 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Southwest wind 5 to 10 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 54. West wind around 10 mph.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. West wind around 5 mph becoming calm.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 54. South wind 5 to 10 mph.

    High: 54 °F

    Partly Sunny

  • Monday Night

    Monday Night: Rain, mainly after 1am. Low around 45. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Chance Rain
    then Rain

  • Tuesday

    Tuesday: A 50 percent chance of rain before 1pm. Mostly cloudy, with a high near 58.

    High: 58 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 43. Breezy.

    High: 43 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 49. Calm wind becoming west around 5 mph.
Tonight
Mostly cloudy, with a low around 35. Southwest wind 5 to 10 mph.
Sunday
Sunny, with a high near 54. West wind around 10 mph.
Sunday Night
Mostly clear, with a low around 31. West wind around 5 mph becoming calm.
Monday
Partly sunny, with a high near 54. South wind 5 to 10 mph.
Monday Night
Rain, mainly after 1am. Low around 45. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A 50 percent chance of rain before 1pm. Mostly cloudy, with a high near 58.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 43. Breezy.
Wednesday Night
Partly cloudy, with a low around 24.
Thanksgiving Day
Mostly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 34.
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Forecast Area
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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:
2:45 pm EST Nov 22, 2025
Forecast Valid:
3pm EST Nov 22, 2025-6pm EST Nov 28, 2025
 
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