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

67°F

19°C

Humidity 86%
Wind Speed Calm
Barometer 29.88 in (1011.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 12 Sep 1:55 am EDT
Extended Forecast for

Mexico IN

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. Southeast wind around 5 mph.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and noon. Partly sunny, with a high near 85. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82. Light northwest wind increasing to 5 to 10 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 10 percent chance of showers before 7pm. Partly cloudy, with a low around 56. Northeast wind 5 to 10 mph.

    Low: 56 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. Southeast wind around 5 mph.
Saturday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and noon. Partly sunny, with a high near 85. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 66. Calm wind.
Sunday
Mostly sunny, with a high near 82. Light northwest wind increasing to 5 to 10 mph in the afternoon.
Sunday Night
A 10 percent chance of showers before 7pm. Partly cloudy, with a low around 56. Northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87.
Tuesday Night
A slight chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Wednesday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 66. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 80. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Friday
A chance of showers. Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mexico IN
 40.82°N 86.1°W (Elev. 699 ft)
Last Update:
2:01 am EDT Sep 12, 2026
Forecast Valid:
2am EDT Sep 12, 2026-6pm EDT Sep 18, 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