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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

69°F

21°C

Humidity 73%
Wind Speed Calm
Barometer 29.96 in (1014.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 20 Jun 9:54 pm CDT
Extended Forecast for

Bement IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. Light and variable wind.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms, mainly after 11am. Some of the storms could produce heavy rainfall. High near 74. East southeast wind 6 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    High: 74 °F

    T-storms
    Likely then
    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 1am, then a chance of showers. Low around 61. Southeast wind 11 to 18 mph becoming west northwest in the evening. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 61 °F

    T-storms then
    Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 73. North wind around 15 mph, with gusts as high as 22 mph.

    High: 73 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. North northeast wind 7 to 11 mph, with gusts as high as 16 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

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

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. Light and variable wind.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 60. Light and variable wind.
Sunday
Showers and thunderstorms, mainly after 11am. Some of the storms could produce heavy rainfall. High near 74. East southeast wind 6 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
Showers and thunderstorms before 1am, then a chance of showers. Low around 61. Southeast wind 11 to 18 mph becoming west northwest in the evening. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday
Mostly cloudy, with a high near 73. North wind around 15 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 54. North northeast wind 7 to 11 mph, with gusts as high as 16 mph.
Tuesday
Sunny, with a high near 77. North northeast wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 58. Light and variable wind.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 79.
Friday Night
A chance of showers. Partly cloudy, with a low around 61.
Saturday
A chance of showers. Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bement IL
 39.92°N 88.56°W (Elev. 676 ft)
Last Update:
8:11 pm CDT Jun 20, 2026
Forecast Valid:
10pm CDT Jun 20, 2026-6pm CDT Jun 27, 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