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.

Overcast

70°F

21°C

Humidity 95%
Wind Speed W 6 mph
Barometer 29.92 in (1012.9 mb)
Dewpoint 68°F (20°C)
Visibility 8.00 mi
Last update 5 Jul 7:55 am EDT
Extended Forecast for

Onward IN

  • Today

    Today: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 81. Southwest wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 80 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 63. North wind around 5 mph.

    Low: 63 °F

    Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. North wind around 5 mph.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Today
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 81. Southwest wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 40%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 63. North wind around 5 mph.
Tuesday
Sunny, with a high near 83. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 85.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Onward IN
 40.7°N 86.22°W (Elev. 751 ft)
Last Update:
6:31 am EDT Jul 5, 2026
Forecast Valid:
8am EDT Jul 5, 2026-6pm EDT Jul 11, 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