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

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Dahlgren IL

Cold Weather Advisory January 30, 09:00pm until January 31, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 19. North wind around 10 mph, with gusts as high as 20 mph.

    High: 19 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of flurries between 7pm and 3am. Mostly cloudy, with a low around 4. Wind chill values as low as -9. North wind 7 to 9 mph.

    Low: 4 °F

    Chance
    Flurries

  • Saturday

    Saturday: Partly sunny, with a high near 18. Wind chill values as low as -11. North northwest wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 18 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 2. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 2 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 27. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 27 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18. South wind around 6 mph.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 36. West wind 3 to 6 mph.

    High: 36 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 24. Light and variable wind.

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers after noon. Mostly cloudy, with a high near 39. South southeast wind around 6 mph becoming northeast in the afternoon.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

Detailed Forecast

This Afternoon
Partly sunny, with a high near 19. North wind around 10 mph, with gusts as high as 20 mph.
Tonight
A chance of flurries between 7pm and 3am. Mostly cloudy, with a low around 4. Wind chill values as low as -9. North wind 7 to 9 mph.
Saturday
Partly sunny, with a high near 18. Wind chill values as low as -11. North northwest wind 9 to 13 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 2. Northwest wind 5 to 7 mph becoming calm after midnight.
Sunday
Mostly sunny, with a high near 27. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 18. South wind around 6 mph.
Monday
Mostly sunny, with a high near 36. West wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 24. Light and variable wind.
Tuesday
A chance of rain and snow showers after noon. Mostly cloudy, with a high near 39. South southeast wind around 6 mph becoming northeast in the afternoon.
Tuesday Night
A chance of rain and snow showers before midnight. Mostly cloudy, with a low around 24. North wind around 7 mph.
Wednesday
Mostly cloudy, with a high near 32. North wind 7 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 15. North wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 32. Light and variable wind becoming west northwest around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dahlgren IL
 38.19°N 88.7°W
Last Update:
3:16 pm CST Jan 30, 2026
Forecast Valid:
3pm CST Jan 30, 2026-6pm CST Feb 5, 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