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

61°F

16°C

Humidity 93%
Wind Speed E 16 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Jun 1:55 am EDT
Extended Forecast for

Peru IN

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Low around 58. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 11am. Mostly cloudy, with a high near 73. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. North wind 5 to 10 mph.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 76. Calm wind becoming north around 5 mph in the afternoon.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54. Northwest wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 77. Chance of precipitation is 30%.

    High: 77 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.

    High: 78 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    T-storms then
    Slight Chance
    Showers

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 58. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers likely, mainly before 11am. Mostly cloudy, with a high near 73. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 53. North wind 5 to 10 mph.
Tuesday
Sunny, with a high near 76. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 54. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 77. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 78.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Peru IN
 40.73°N 86.05°W (Elev. 751 ft)
Last Update:
1:47 am EDT Jun 22, 2026
Forecast Valid:
2am EDT Jun 22, 2026-6pm EDT Jun 28, 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