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.

Overcast

43°F

6°C

Humidity 76%
Wind Speed E 9 mph
Barometer 30.04 in (1017.6 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 17 Nov 9:54 pm CST
Extended Forecast for

Blue Mound IL

  • Tonight

    Tonight: Rain likely before 3am, then rain likely and possibly a thunderstorm between 3am and 4am, then a chance of rain and thunderstorms after 4am. Cloudy, with a low around 44. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Rain Likely

  • Tuesday

    Tuesday: A 20 percent chance of rain between noon and 3pm. Cloudy, with a high near 59. Southeast wind 6 to 14 mph becoming north northeast in the afternoon.

    High: 59 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. North northeast wind 5 to 7 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 56. Northeast wind around 5 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 62. South wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. South wind 6 to 9 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Rain Likely

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 55. Chance of precipitation is 70%.

    High: 55 °F

    Rain Likely

  • Friday Night

    Friday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Rain likely before 3am, then rain likely and possibly a thunderstorm between 3am and 4am, then a chance of rain and thunderstorms after 4am. Cloudy, with a low around 44. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 20 percent chance of rain between noon and 3pm. Cloudy, with a high near 59. Southeast wind 6 to 14 mph becoming north northeast in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 42. North northeast wind 5 to 7 mph.
Wednesday
Mostly cloudy, with a high near 56. Northeast wind around 5 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 62. 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 and possibly a thunderstorm. Mostly cloudy, with a low around 47. South wind 6 to 9 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain likely. Mostly cloudy, with a high near 55. 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 55.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Partly sunny, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blue Mound IL
 39.69°N 89.12°W (Elev. 614 ft)
Last Update:
9:36 pm CST Nov 17, 2025
Forecast Valid:
10pm CST Nov 17, 2025-6pm CST Nov 24, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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