7-Day Forecast 40.65°N 86.14°W (Text-Only)
NWS Forecast for: Grissom Air Force Base / Peru IN
Issued by: National Weather Service Northern Indiana
Last Update: 12:31 pm EST Dec 5, 2025
Print


  • This
    Afternoon

    This Afternoon: Mostly sunny, with a high near 28. Southwest wind around 10 mph.

    High: 28 °F

    Mostly Sunny


  • Tonight

    Tonight: Mostly cloudy, with a temperature rising to around 27 by 4am. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Mostly Cloudy


  • Saturday

    Saturday: Mostly cloudy, with a high near 32. West wind 5 to 10 mph.

    High: 32 °F

    Mostly Cloudy


  • Saturday
    Night

    Saturday Night: A 30 percent chance of snow after 1am.  Cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Cloudy then
    Chance Snow

  • Sunday

    Sunday: Snow likely, mainly before 1pm.  Mostly cloudy, with a high near 31. Southeast wind 5 to 10 mph becoming northwest in the afternoon.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 31 °F

    Snow Likely


  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 5.

    Low: 5 °F

    Mostly Cloudy


  • Monday

    Monday: Mostly sunny and cold, with a high near 19.

    High: 19 °F

    Cold


  • Monday
    Night

    Monday Night: A 20 percent chance of snow after 1am.  Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: A 20 percent chance of snow before 1pm.  Mostly cloudy, with a high near 35.

    High: 35 °F

    Slight Chance
    Snow



  • This Afternoon: Mostly sunny, with a high near 28. Southwest wind around 10 mph.

    Tonight: Mostly cloudy, with a temperature rising to around 27 by 4am. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Saturday: Mostly cloudy, with a high near 32. West wind 5 to 10 mph.

    Saturday Night: A 30 percent chance of snow after 1am. Cloudy, with a low around 22. Calm wind.

    Sunday: Snow likely, mainly before 1pm. Mostly cloudy, with a high near 31. Southeast wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Sunday Night: Mostly cloudy, with a low around 5.

    Monday: Mostly sunny and cold, with a high near 19.

    Monday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 11.

    Tuesday: A 20 percent chance of snow before 1pm. Mostly cloudy, with a high near 35.

    Tuesday Night: A slight chance of rain and snow before 1am, then a chance of rain. Cloudy, with a low around 28. Chance of precipitation is 40%.

    Wednesday: Rain likely. Cloudy, with a high near 37. Chance of precipitation is 60%.

    Wednesday Night: A chance of snow and freezing rain. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.

    Thursday: A slight chance of snow. Mostly cloudy, with a high near 25.



    Grissom Air Force Base / Peru IN
     40.65°N 86.14°W (Elev. 804 ft)

    Visit your local NWS office at: https://www.weather.gov/iwx