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.

Fair

91°F

33°C

Humidity 55%
Wind Speed SW 13 mph
Barometer 30.05 in (1017.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 2 Jul 5:55 pm EDT
Extended Forecast for

3 Miles NNW Somerset IN

Extreme Heat Warning July 2, 07:02pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 2, 07:02pm until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 71. West wind around 5 mph.

    Low: 71 °F

    Chance
    T-storms

  • Independence Day

    Independence Day: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 88. Heat index values as high as 98. Southwest wind around 5 mph. Chance of precipitation is 60%.

    High: 88 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 69. West wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 69 °F

    Showers
    Likely

  • Sunday

    Sunday: 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 86. Chance of precipitation is 60%.

    High: 86 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 65. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely then
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 73. Southwest wind 5 to 10 mph becoming light in the evening.
Friday
A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 71. West wind around 5 mph.
Independence Day
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 88. Heat index values as high as 98. Southwest wind around 5 mph. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 69. West wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
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 86. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 65. Chance of precipitation is 60%.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84.
Monday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Somerset IN
 40.75°N 85.9°W (Elev. 745 ft)
Last Update:
6:18 pm EDT Jul 2, 2026
Forecast Valid:
7pm EDT Jul 2, 2026-6pm EDT Jul 9, 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