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.

Fair

76°F

24°C

Humidity 76%
Wind Speed NW 6 mph
Barometer 30.01 in (1015.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 8 Aug 8:55 pm EDT
Extended Forecast for

Amboy IN

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 61. Northwest wind around 5 mph becoming calm.

    Low: 61 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Southwest wind 5 to 10 mph.

    High: 86 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 70. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 86. Southwest wind around 10 mph.

    High: 86 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 61. Northwest wind around 5 mph becoming calm.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Southwest wind 5 to 10 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 70. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 86. Southwest wind around 10 mph.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Amboy IN
 40.59°N 85.94°W (Elev. 797 ft)
Last Update:
7:31 pm EDT Aug 8, 2026
Forecast Valid:
9pm EDT Aug 8, 2026-6pm EDT Aug 15, 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