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

76°F

24°C

Humidity 42%
Wind Speed W 12 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Jun 5:55 pm EDT
Extended Forecast for

Somerset IN

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between 2am and 5am. Partly cloudy, with a low around 58. Northwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 58 °F

    Mostly Clear
    then Chance
    Showers

  • Saturday

    Saturday: A 10 percent chance of showers before 8am. Mostly sunny, with a high near 77. West wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. West wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers after 2pm. High near 76. Southeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Partly Sunny
    then Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 61. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 61 °F

    Heavy Rain

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly between 2am and 5am. Partly cloudy, with a low around 58. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Saturday
A 10 percent chance of showers before 8am. Mostly sunny, with a high near 77. West wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 57. West wind around 5 mph becoming calm in the evening.
Sunday
Showers after 2pm. High near 76. Southeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 61. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Monday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 54.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 75. Chance of precipitation is 40%.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 75.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Somerset IN
 40.7°N 85.87°W (Elev. 781 ft)
Last Update:
5:47 pm EDT Jun 19, 2026
Forecast Valid:
6pm EDT Jun 19, 2026-6pm EDT Jun 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