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

40°F

4°C

Humidity 68%
Wind Speed E 6 mph
Barometer 30.34 in (1028.2 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 20 Apr 8:55 am EDT
Extended Forecast for

Amboy IN

  • Today

    Today: Areas of frost before 10am. Otherwise, sunny, with a high near 54. Calm wind becoming northeast around 5 mph.

    High: 54 °F

    Areas Frost
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. Light south wind increasing to 5 to 10 mph in the evening.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74. Southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75. West wind around 10 mph.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 2am. Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
Areas of frost before 10am. Otherwise, sunny, with a high near 54. Calm wind becoming northeast around 5 mph.
Tonight
Mostly clear, with a low around 41. Light south wind increasing to 5 to 10 mph in the evening.
Tuesday
Mostly sunny, with a high near 74. Southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 75. West wind around 10 mph.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 62.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 68.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 48.
Sunday
A slight chance of showers. Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Amboy IN
 40.59°N 85.94°W (Elev. 797 ft)
Last Update:
6:30 am EDT Apr 20, 2026
Forecast Valid:
9am EDT Apr 20, 2026-6pm EDT Apr 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