Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Light Rain Fog/Mist

68°F

20°C

Humidity 93%
Wind Speed SE 15 mph
Barometer 29.75 in (1007.3 mb)
Dewpoint 66°F (19°C)
Visibility 4.00 mi
Last update 21 Jun 3:54 pm CDT
Extended Forecast for

Hammond IL

Flood Watch June 21, 04:16pm until June 22, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 21, 04:16pm until June 22, 01:00am

    NOW until 1:00am Mon

    Flood Watch

  • This Afternoon

    High: 74 °F

    Heavy Rain

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 4am. Some of the storms could produce heavy rainfall.  Cloudy, with a low around 61. South wind 9 to 14 mph becoming west northwest after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 50%.

    Low: 61 °F

    Heavy Rain
    then Slight
    Chance
    Showers

  • Monday

    Monday: Mostly cloudy, with a high near 73. North wind around 15 mph, with gusts as high as 23 mph.

    High: 73 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. North northeast wind 5 to 11 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Northeast wind 3 to 6 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Light and variable wind.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 79. Southeast wind 5 to 8 mph becoming southwest in the afternoon.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 74. South southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 4am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 61. South wind 9 to 14 mph becoming west northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Monday
Mostly cloudy, with a high near 73. North wind around 15 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 54. North northeast wind 5 to 11 mph, with gusts as high as 15 mph.
Tuesday
Sunny, with a high near 77. Northeast wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 57. Light and variable wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. Southeast wind 5 to 8 mph becoming southwest in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 60.
Friday
A chance of showers. Mostly sunny, with a high near 80.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Sunday
Partly sunny, with a high near 86. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Hammond IL
 39.81°N 88.6°W (Elev. 673 ft)
2:41 pm CDT Jun 21, 2026
4pm CDT Jun 21, 2026-6pm CDT Jun 28, 2026
 
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Additional Resources

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