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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

65°F

18°C

Humidity 78%
Wind Speed E 8 mph
Barometer 30.10 in (1018.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 15 Oct 2:54 am CDT
Extended Forecast for

Bement IL

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 61. East northeast wind around 8 mph.

    Low: 61 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 76. East wind 7 to 14 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 4am. Mostly cloudy, with a low around 46. Breezy, with a southwest wind 16 to 21 mph becoming west northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers
    Likely then
    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 30 percent chance of showers after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 55. Breezy, with a northwest wind 21 to 23 mph, with gusts as high as 31 mph.

    High: 55 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: Cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 13 to 20 mph, with gusts as high as 25 mph.

    Low: 36 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 58. North wind 5 to 8 mph becoming calm in the afternoon.

    High: 58 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 2am. Otherwise, clear, with a low around 34. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68.

    High: 68 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 61. East northeast wind around 8 mph.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 76. East wind 7 to 14 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 4am. Mostly cloudy, with a low around 46. Breezy, with a southwest wind 16 to 21 mph becoming west northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 55. Breezy, with a northwest wind 21 to 23 mph, with gusts as high as 31 mph.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 13 to 20 mph, with gusts as high as 25 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 58. North wind 5 to 8 mph becoming calm in the afternoon.
Saturday Night
Areas of frost after 2am. Otherwise, clear, with a low around 34. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 37.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bement IL
 39.92°N 88.56°W (Elev. 676 ft)
Last Update:
1:55 am CDT Oct 15, 2026
Forecast Valid:
3am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation