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

66°F

19°C

Humidity 50%
Wind Speed SW 20 mph
Barometer 29.84 in (1010.7 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 9 Mar 12:55 pm EDT
Extended Forecast for

Onward IN

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. Southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers between 11pm and 5am. Mostly cloudy, with a low around 60. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 60 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 56. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    T-storms
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 65. Southwest wind around 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 65 °F

    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29. Blustery.

    Low: 29 °F

    Cloudy and
    Blustery then
    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 38. Breezy.

    Low: 38 °F

    Mostly Cloudy
    then Chance
    Rain and
    Breezy

  • Friday

    Friday: A 30 percent chance of rain before 8am. Mostly cloudy, with a high near 52. Breezy.

    High: 52 °F

    Breezy.
    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 69. Southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
A slight chance of showers between 11pm and 5am. Mostly cloudy, with a low around 60. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 56. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm. High near 65. Southwest wind around 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
Mostly cloudy, with a low around 29. Blustery.
Thursday
Sunny, with a high near 45.
Thursday Night
A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 38. Breezy.
Friday
A 30 percent chance of rain before 8am. Mostly cloudy, with a high near 52. Breezy.
Friday Night
Mostly cloudy, with a low around 32.
Saturday
Mostly cloudy, with a high near 50.
Saturday Night
A 30 percent chance of rain. Cloudy, with a low around 42.
Sunday
Rain likely. Cloudy, with a high near 58. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Onward IN
 40.7°N 86.19°W (Elev. 761 ft)
Last Update:
1:31 pm EDT Mar 9, 2026
Forecast Valid:
1pm EDT Mar 9, 2026-6pm EDT Mar 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