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

52°F

11°C

Humidity 93%
Wind Speed SW 6 mph
Barometer 29.75 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 8 May 11:55 pm EDT
Extended Forecast for

Onward IN

  • Overnight

    Overnight: Mostly cloudy, with a low around 50. Southwest wind around 5 mph.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 73. Southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 73 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms, then a chance of showers after 8pm. Mostly cloudy, with a low around 50. West wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 40%.

    Low: 50 °F

    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 63. North wind 5 to 10 mph.

    High: 63 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. North wind 5 to 10 mph becoming light after midnight.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 63. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday 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 51. Chance of precipitation is 70%.

    Low: 51 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 50. Southwest wind around 5 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 73. Southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday Night
A slight chance of showers and thunderstorms, then a chance of showers after 8pm. Mostly cloudy, with a low around 50. West wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 63. North wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 41. North wind 5 to 10 mph becoming light after midnight.
Monday
Sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 39.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 63. Chance of precipitation is 40%.
Tuesday 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 51. Chance of precipitation is 70%.
Wednesday
A 10 percent chance of showers before 8am. Mostly sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 52.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Onward IN
 40.7°N 86.19°W (Elev. 761 ft)
Last Update:
12:45 am EDT May 9, 2026
Forecast Valid:
1am EDT May 9, 2026-6pm EDT May 15, 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