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.

Fog/Mist

37°F

3°C

Humidity 100%
Wind Speed E 6 mph
Barometer 30.12 in (1020.5 mb)
Dewpoint 37°F (3°C)
Visibility 0.75 mi
Wind Chill32°F (0°C)
Last update 3 Mar 2:54 am CST
Extended Forecast for

Argenta IL

  • Overnight

    Overnight: A 40 percent chance of showers after 5am. Patchy fog after 4am. Otherwise, cloudy, with a low around 36. East wind around 6 mph.

    Low: 36 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 3pm. Patchy fog. High near 46. East southeast wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 46 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 3am, then showers likely. Patchy fog. Low around 41. Northeast wind 7 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 41 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers likely. Patchy fog before noon. Otherwise, cloudy, with a high near 54. East southeast wind 7 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 54 °F

    Showers
    Likely and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 49. East southeast wind 7 to 9 mph becoming south southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Rain

  • Thursday

    Thursday: Rain likely, mainly before noon. Mostly cloudy, with a high near 63. Southwest wind 9 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 49. West wind 6 to 10 mph becoming southeast after midnight. Winds could gust as high as 15 mph.

    Low: 49 °F

    Partly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain likely, mainly before noon. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 60%.

    High: 74 °F

    Rain Likely
    and Breezy

  • Friday Night

    Friday Night: A chance of rain, then rain and possibly a thunderstorm after midnight. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Chance Rain
    then Rain

Detailed Forecast

Overnight
A 40 percent chance of showers after 5am. Patchy fog after 4am. Otherwise, cloudy, with a low around 36. East wind around 6 mph.
Tuesday
Showers, with thunderstorms also possible after 3pm. Patchy fog. High near 46. East southeast wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm before 3am, then showers likely. Patchy fog. Low around 41. Northeast wind 7 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers likely. Patchy fog before noon. Otherwise, cloudy, with a high near 54. East southeast wind 7 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain and possibly a thunderstorm. Low around 49. East southeast wind 7 to 9 mph becoming south southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Rain likely, mainly before noon. Mostly cloudy, with a high near 63. Southwest wind 9 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 49. West wind 6 to 10 mph becoming southeast after midnight. Winds could gust as high as 15 mph.
Friday
Rain likely, mainly before noon. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 60%.
Friday Night
A chance of rain, then rain and possibly a thunderstorm after midnight. Low around 56. Chance of precipitation is 80%.
Saturday
Rain likely before noon. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 44.
Monday
Mostly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Argenta IL
 39.99°N 88.82°W (Elev. 676 ft)
Last Update:
2:21 am CST Mar 3, 2026
Forecast Valid:
3am CST Mar 3, 2026-6pm CDT Mar 9, 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