National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

43°F

6°C

Humidity 42%
Wind Speed NE 9 mph
Barometer 30.39 in (1029.7 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 23 Mar 6:54 pm CDT
Extended Forecast for

Hammond IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. East wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. South southeast wind 8 to 10 mph, with gusts as high as 16 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. Southeast wind around 8 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 71. South southwest wind 8 to 16 mph, with gusts as high as 23 mph.

    High: 71 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. South wind 11 to 13 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Breezy, with a southwest wind 13 to 20 mph, with gusts as high as 29 mph.

    High: 83 °F

    Sunny then
    Chance
    T-storms and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 36. Breezy, with a west wind 20 to 24 mph becoming north northeast after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Showers and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 47. Breezy.

    High: 47 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. East wind 6 to 10 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 58. South southeast wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 40. Southeast wind around 8 mph.
Wednesday
Partly sunny, with a high near 71. South southwest wind 8 to 16 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 57. South wind 11 to 13 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Breezy, with a southwest wind 13 to 20 mph, with gusts as high as 29 mph.
Thursday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 36. Breezy, with a west wind 20 to 24 mph becoming north northeast after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Partly sunny, with a high near 47. Breezy.
Friday Night
Mostly clear, with a low around 27.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Partly sunny, with a high near 60.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hammond IL
 39.81°N 88.6°W (Elev. 673 ft)
Last Update:
6:36 pm CDT Mar 23, 2026
Forecast Valid:
7pm CDT Mar 23, 2026-6pm CDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation