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.

Fog

32°F

0°C

Humidity 95%
Wind Speed Calm
Barometer 30.27 in (1025.9 mb)
Dewpoint 31°F (-1°C)
Visibility 0.38 mi
Last update 24 Dec 4:55 am EST
Extended Forecast for

Peru IN

  • Today

    Today: Patchy fog before 9am. Otherwise, partly sunny, with a high near 47. Southeast wind 5 to 10 mph.

    High: 47 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Rain likely, mainly before 1am. Cloudy, with a low around 40. Southeast wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 70%.

    Low: 40 °F

    Rain Likely

  • Christmas Day

    Christmas Day: A 10 percent chance of rain before 7am. Mostly cloudy, with a high near 47. North wind 5 to 10 mph becoming east in the afternoon.

    High: 47 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 50 percent chance of rain after 1am. Cloudy, with a low around 36. East wind around 10 mph.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain likely, mainly before 1pm. Mostly cloudy, with a high near 55. Southeast wind around 10 mph becoming west in the afternoon. Chance of precipitation is 70%.

    High: 55 °F

    Rain Likely

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: A 40 percent chance of rain. Mostly cloudy, with a high near 52.

    High: 52 °F

    Chance Rain

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, partly sunny, with a high near 47. Southeast wind 5 to 10 mph.
Tonight
Rain likely, mainly before 1am. Cloudy, with a low around 40. Southeast wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 70%.
Christmas Day
A 10 percent chance of rain before 7am. Mostly cloudy, with a high near 47. North wind 5 to 10 mph becoming east in the afternoon.
Thursday Night
A 50 percent chance of rain after 1am. Cloudy, with a low around 36. East wind around 10 mph.
Friday
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 55. Southeast wind around 10 mph becoming west in the afternoon. Chance of precipitation is 70%.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly cloudy, with a high near 54.
Saturday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 43.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 52.
Sunday Night
A 20 percent chance of rain before 1am. Partly cloudy, with a low around 13. Breezy.
Monday
Mostly sunny and cold, with a high near 20. Breezy.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 24.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.76°N 86.07°W (Elev. 656 ft)
Last Update:
4:16 am EST Dec 24, 2025
Forecast Valid:
5am EST Dec 24, 2025-6pm EST Dec 30, 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