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

53°F

12°C

Humidity 83%
Wind Speed Calm
Barometer 29.93 in (1013.4 mb)
Dewpoint 48°F (9°C)
Visibility 8.00 mi
Last update 8 Oct 2:55 am EDT
Extended Forecast for

Onward IN

  • Overnight

    Overnight: Mostly clear, with a low around 50. West wind around 5 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 73. West wind 5 to 10 mph.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. North wind around 5 mph becoming calm.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78. Southeast wind around 5 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. South wind 5 to 10 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 50. West wind around 5 mph.
Thursday
Sunny, with a high near 73. West wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 49. North wind around 5 mph becoming calm.
Friday
Mostly sunny, with a high near 78. Southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 58. South wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Sunday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 56.
Columbus Day
Mostly sunny, with a high near 79.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Onward IN
 40.7°N 86.22°W (Elev. 751 ft)
Last Update:
3:00 am EDT Oct 8, 2026
Forecast Valid:
3am EDT Oct 8, 2026-6pm EDT Oct 14, 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