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.

Partly Cloudy

76°F

24°C

Humidity 77%
Wind Speed E 6 mph
Barometer 29.90 in (1012.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 20 Sep 12:55 pm EDT
Extended Forecast for

Mexico IN

Flood Watch September 20, 01:53pm until September 20, 02:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch September 20, 01:53pm until September 20, 02:00pm

    NOW until 2:00pm Sun

    Flood Watch

  • This Afternoon

    High: 76 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 11pm, then showers likely. Some of the storms could produce heavy rainfall. Low around 56. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Heavy Rain
    then Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 66. Northeast wind around 15 mph, with gusts as high as 20 mph.

    High: 66 °F

    Chance
    Showers then
    Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 53. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 64. Northeast wind around 15 mph, with gusts as high as 20 mph.

    High: 64 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 76. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 11pm, then showers likely. Some of the storms could produce heavy rainfall. Low around 56. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 66. Northeast wind around 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 53. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 64. Northeast wind around 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
Mostly cloudy, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 67.
Thursday Night
Mostly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mexico IN
 40.82°N 86.1°W (Elev. 699 ft)
Last Update:
12:30 pm EDT Sep 20, 2026
Forecast Valid:
1pm EDT Sep 20, 2026-6pm EDT Sep 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