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.

Mostly Cloudy

70°F

21°C

Humidity 92%
Wind Speed Calm
Barometer 29.92 in (1012.9 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 19 Aug 11:55 pm EDT
Extended Forecast for

Somerset IN

Flood Watch August 20, 12:48am until August 20, 08:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch August 20, 12:48am until August 20, 08:00am

    NOW until 8:00am Thu

    Flood Watch

  • Overnight

    Low: 61 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 79. Calm wind becoming north around 5 mph in the afternoon.

    High: 79 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79. Calm wind becoming southwest around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 11pm, then a slight chance of showers and thunderstorms between 11pm and 2am, then a slight chance of showers after 2am. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 58.

    Low: 58 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly before 3am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 61. Calm wind.
Thursday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 79. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 59. Calm wind.
Friday
Mostly sunny, with a high near 79. Calm wind becoming southwest around 5 mph.
Friday Night
A slight chance of showers before 11pm, then a slight chance of showers and thunderstorms between 11pm and 2am, then a slight chance of showers after 2am. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 77.
Saturday Night
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 54.
Monday
A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 75.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 60.
Wednesday
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:
Somerset IN
 40.7°N 85.87°W (Elev. 781 ft)
Last Update:
11:16 pm EDT Aug 19, 2026
Forecast Valid:
12am EDT Aug 20, 2026-6pm EDT Aug 26, 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