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

40°F

4°C

Humidity 77%
Wind Speed NW 14 G 23 mph
Barometer 30.10 in (1019.5 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 11 Mar 6:54 pm CDT
Extended Forecast for

Hammond IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 28. Blustery, with a north northwest wind 16 to 21 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph.

    Low: 28 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 50. West wind 7 to 14 mph, with gusts as high as 18 mph.

    High: 50 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. Breezy, with a south wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 37 mph.

    Low: 40 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 55. Breezy, with a west wind 20 to 25 mph, with gusts as high as 36 mph.

    High: 55 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 31. West northwest wind 7 to 11 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 51. East southeast wind 8 to 11 mph, with gusts as high as 17 mph.

    High: 51 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 43. East wind 11 to 16 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Cloudy

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 61. Windy. Chance of precipitation is 80%.

    High: 61 °F

    Chance Rain
    and Breezy
    then Rain and
    Windy

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 20. Breezy. Chance of precipitation is 50%.

    Low: 20 °F

    Chance
    Rain/Snow and
    Breezy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 28. Blustery, with a north northwest wind 16 to 21 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph.
Thursday
Increasing clouds, with a high near 50. West wind 7 to 14 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 40. Breezy, with a south wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 37 mph.
Friday
Partly sunny, with a high near 55. Breezy, with a west wind 20 to 25 mph, with gusts as high as 36 mph.
Friday Night
Mostly cloudy, with a low around 31. West northwest wind 7 to 11 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly cloudy, with a high near 51. East southeast wind 8 to 11 mph, with gusts as high as 17 mph.
Saturday Night
Cloudy, with a low around 43. East wind 11 to 16 mph, with gusts as high as 25 mph.
Sunday
Rain, mainly after 1pm. High near 61. Windy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 20. Breezy. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 29. Blustery.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 33.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
Mostly cloudy, with a high near 47.
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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:
6:12 pm CDT Mar 11, 2026
Forecast Valid:
7pm CDT Mar 11, 2026-6pm CDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation