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.

A Few Clouds

77°F

25°C

Humidity 88%
Wind Speed SW 8 mph
Barometer 29.89 in (1011.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 5 Sep 1:55 am EDT
Extended Forecast for

Walton IN

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Partly cloudy, with a steady temperature around 77. Calm wind.

    Low: 77 °F

    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 11am, then a slight chance of showers after 2pm. Partly sunny, with a high near 87. Heat index values as high as 97. West wind 5 to 10 mph becoming east in the morning. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. East wind 5 to 10 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79. Northeast wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58. East wind around 5 mph.

    Low: 58 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Partly cloudy, with a steady temperature around 77. Calm wind.
Saturday
A slight chance of showers and thunderstorms before 11am, then a slight chance of showers after 2pm. Partly sunny, with a high near 87. Heat index values as high as 97. West wind 5 to 10 mph becoming east in the morning. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 62. East wind 5 to 10 mph.
Sunday
Sunny, with a high near 79. Northeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 58. East wind around 5 mph.
Labor Day
Sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Walton IN
 40.65°N 86.26°W (Elev. 768 ft)
Last Update:
12:16 am EDT Sep 5, 2026
Forecast Valid:
2am EDT Sep 5, 2026-6pm EDT Sep 11, 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