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

73°F

23°C

Humidity 53%
Wind Speed E 8 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 21 Jun 3:55 pm EDT
Extended Forecast for

Peru IN

  • This Afternoon

    This Afternoon: A 40 percent chance of showers, mainly after 5pm. Cloudy, with a high near 75. East wind around 5 mph.

    High: 75 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 58. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 58 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 11am. Mostly cloudy, with a high near 73. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. North wind 5 to 10 mph becoming light after midnight.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Calm wind becoming north around 5 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 40 percent chance of showers, mainly after 5pm. Cloudy, with a high near 75. East wind around 5 mph.
Tonight
Showers and possibly a thunderstorm. Low around 58. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Monday
Showers likely, mainly before 11am. Mostly cloudy, with a high near 73. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 54. North wind 5 to 10 mph becoming light after midnight.
Tuesday
Sunny, with a high near 77. Calm wind becoming north around 5 mph.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 78.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.76°N 86.07°W (Elev. 656 ft)
Last Update:
3:48 pm EDT Jun 21, 2026
Forecast Valid:
4pm EDT Jun 21, 2026-6pm EDT Jun 27, 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