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.

Overcast

53°F

12°C

Humidity 83%
Wind Speed S 5 mph
Barometer 29.92 in (1013.3 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 7 May 9:54 pm CDT
Extended Forecast for

Hammond IL

  • Tonight

    Tonight: Partly cloudy, with a low around 46. South southwest wind around 9 mph, with gusts as high as 16 mph.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 68. Southwest wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Slight Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 49. South southwest wind 6 to 9 mph. Chance of precipitation is 40%.

    Low: 49 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Breezy, with a west southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 76 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 52. West southwest wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 15 mph.

    Low: 52 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 66. North northwest wind 8 to 11 mph, with gusts as high as 16 mph.

    High: 66 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. North wind 5 to 10 mph.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 46. South southwest wind around 9 mph, with gusts as high as 16 mph.
Friday
Showers and possibly a thunderstorm. High near 68. Southwest wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 49. South southwest wind 6 to 9 mph. Chance of precipitation is 40%.
Saturday
Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Breezy, with a west southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 26 mph.
Saturday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 52. West southwest wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 15 mph.
Sunday
Partly sunny, with a high near 66. North northwest wind 8 to 11 mph, with gusts as high as 16 mph.
Sunday Night
Mostly clear, with a low around 43. North wind 5 to 10 mph.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 45.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 69. Breezy.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hammond IL
 39.81°N 88.6°W (Elev. 673 ft)
Last Update:
9:36 pm CDT May 7, 2026
Forecast Valid:
10pm CDT May 7, 2026-6pm CDT May 14, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation