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.

Mostly Cloudy

48°F

9°C

Humidity 93%
Wind Speed Calm
Barometer 29.78 in (1008.9 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 5 May 9:55 pm EDT
Extended Forecast for

Grissom Air Force Base / Peru IN

  • Tonight

    Tonight: Showers likely, mainly before midnight. Cloudy, with a low around 41. Northeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Partly sunny, with a high near 58. Northwest wind 5 to 10 mph.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 38. Northwest wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 58. West wind 5 to 15 mph.

    High: 58 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43. Southwest wind around 5 mph.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: A 10 percent chance of showers before 8am. Mostly sunny, with a high near 72.

    High: 72 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly before midnight. Cloudy, with a low around 41. Northeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Partly sunny, with a high near 58. Northwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 38. Northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 58. West wind 5 to 15 mph.
Thursday Night
Partly cloudy, with a low around 43. Southwest wind around 5 mph.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 63.
Friday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Saturday
A 10 percent chance of showers before 8am. Mostly sunny, with a high near 72.
Saturday Night
A 40 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 54.
Sunday
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 69.
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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:
9:01 pm EDT May 5, 2026
Forecast Valid:
10pm EDT May 5, 2026-6pm EDT May 12, 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