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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

50°F

10°C

Humidity 96%
Wind Speed Calm
Barometer 30.01 in (1015.9 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 11 Oct 5:54 am CDT
Extended Forecast for

Bement IL

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 83. Light and variable wind becoming north northwest around 5 mph in the afternoon.

    High: 83 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. Calm wind becoming south southwest 5 to 7 mph in the evening.

    Low: 60 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Mostly cloudy, then gradually becoming sunny, with a high near 90. Southwest wind 8 to 15 mph, with gusts as high as 21 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Clear, with a low around 70. Southwest wind 10 to 13 mph, with gusts as high as 18 mph.

    Low: 70 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. West southwest wind 13 to 15 mph, with gusts as high as 20 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 65. West wind 5 to 7 mph becoming northeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 79. Northeast wind 8 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 79 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 83. Light and variable wind becoming north northwest around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 60. Calm wind becoming south southwest 5 to 7 mph in the evening.
Columbus Day
Mostly cloudy, then gradually becoming sunny, with a high near 90. Southwest wind 8 to 15 mph, with gusts as high as 21 mph.
Monday Night
Clear, with a low around 70. Southwest wind 10 to 13 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 89. West southwest wind 13 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 65. West wind 5 to 7 mph becoming northeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 79. Northeast wind 8 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 58.
Thursday
Showers likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 51.
Friday
Partly sunny, with a high near 66. Breezy.
Friday Night
Partly cloudy, with a low around 38. Breezy.
Saturday
Mostly sunny, with a high near 59.
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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:
6:06 am CDT Oct 11, 2026
Forecast Valid:
6am CDT Oct 11, 2026-6pm CDT Oct 17, 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