National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Grissom Air Force Base / Peru (KGUS)

Lat: 40.65°NLon: 86.15°WElev: 810ft.

Fog/Mist

67°F

19°C

Humidity 95%
Wind Speed Calm
Barometer 30.08 in (1018.5 mb)
Dewpoint 65°F (18°C)
Visibility 3.00 mi
Last update 7 Aug 6:55 am EDT
Extended Forecast for

5 Miles W Somerset IN

Dense Fog Advisory until August 7, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until August 7, 09:00am

    NOW until 9:00am Fri

    Dense Fog Advisory

  • Today

    High: 82 °F

    Areas Dense
    Fog then
    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 68. Southwest wind around 5 mph.

    Low: 68 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 2pm. Partly sunny, with a high near 83. West wind 5 to 10 mph.

    High: 83 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Northwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 84. Light south wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Areas of dense fog before 9am. Otherwise, partly sunny, with a high near 82. Calm wind becoming southwest around 5 mph in the morning.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 68. Southwest wind around 5 mph.
Saturday
A 20 percent chance of showers and thunderstorms before 2pm. Partly sunny, with a high near 83. West wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 62. Northwest wind around 5 mph becoming calm in the evening.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 84. Light south wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Monday
A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Somerset IN
 40.71°N 85.96°W (Elev. 748 ft)
Last Update:
8:01 am EDT Aug 7, 2026
Forecast Valid:
8am EDT Aug 7, 2026-6pm EDT Aug 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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