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

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

57°F

14°C

Humidity 19%
Wind Speed SE 12 mph
Barometer 30.04 in (1017.6 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Last update 17 Nov 2:54 pm CST
Extended Forecast for

2 Miles NNW Blue Mound IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 58. Southeast wind around 9 mph.

    High: 58 °F

    Partly Sunny

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 3am, then a chance of rain. Low around 44. Southeast wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 44 °F

    Rain

  • Tuesday

    Tuesday: A slight chance of rain before noon, then a slight chance of rain and thunderstorms between noon and 3pm. Mostly cloudy, with a high near 59. Southeast wind 8 to 13 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 59 °F

    Slight Chance
    Rain then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. North northeast wind 6 to 8 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 56. Northeast wind around 6 mph becoming calm in the morning.

    High: 56 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 42. Calm wind becoming southeast around 5 mph after midnight.

    Low: 42 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain likely, mainly after noon. Mostly cloudy, with a high near 63. South wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.

    Low: 47 °F

    Rain Likely

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 56. Chance of precipitation is 70%.

    High: 56 °F

    Rain Likely

Detailed Forecast

This Afternoon
Partly sunny, with a high near 58. Southeast wind around 9 mph.
Tonight
Rain and possibly a thunderstorm before 3am, then a chance of rain. Low around 44. Southeast wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A slight chance of rain before noon, then a slight chance of rain and thunderstorms between noon and 3pm. Mostly cloudy, with a high near 59. Southeast wind 8 to 13 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 42. North northeast wind 6 to 8 mph.
Wednesday
Mostly cloudy, with a high near 56. Northeast wind around 6 mph becoming calm in the morning.
Wednesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 42. Calm wind becoming southeast around 5 mph after midnight.
Thursday
Rain likely, mainly after noon. Mostly cloudy, with a high near 63. South wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain likely. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Friday
Rain likely. Mostly cloudy, with a high near 56. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 52.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Blue Mound IL
 39.74°N 89.12°W (Elev. 600 ft)
Last Update:
3:16 pm CST Nov 17, 2025
Forecast Valid:
3pm CST Nov 17, 2025-6pm CST Nov 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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