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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

24°F

-4°C

Humidity 62%
Wind Speed N 9 mph
Barometer 30.39 in (1029.5 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 23 Jan 2:52 am CST
Extended Forecast for

2 Miles N Saint Johns IL

Cold Weather Advisory January 23, 06:00pm until January 24, 01:00pm
Winter Storm Warning January 24, 12:00am until January 25, 06:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning

  • Overnight

    Overnight: Partly cloudy, with a low around 14. North wind 8 to 14 mph, with gusts as high as 28 mph.

    Low: 14 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a temperature falling to around 10 by 5pm. Wind chill values as low as -5. North wind 13 to 16 mph, with gusts as high as 28 mph.

    High: 15 °F⇓

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly after 5am. Mostly cloudy, with a low around 6. Wind chill values as low as -10. Northeast wind around 13 mph, with gusts as high as 21 mph.

    Low: 6 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Snow showers. High near 13. Wind chill values as low as -8. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    High: 13 °F

    Snow Showers
    Likely then
    Snow Showers

  • Saturday Night

    Saturday Night: Snow showers before 9pm, then snow showers, possibly mixed with sleet. Low around 11. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    Low: 11 °F

    Snow/Sleet

  • Sunday

    Sunday: Snow showers, mainly before noon. High near 16. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    High: 16 °F

    Snow Showers
    then Chance
    Snow Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 0. Northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 0 °F

    Slight Chance
    Snow Showers
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 16. West northwest wind 6 to 10 mph.

    High: 16 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Clear, with a low around 3. South southwest wind 5 to 9 mph.

    Low: 3 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 14. North wind 8 to 14 mph, with gusts as high as 28 mph.
Friday
Partly sunny, with a temperature falling to around 10 by 5pm. Wind chill values as low as -5. North wind 13 to 16 mph, with gusts as high as 28 mph.
Friday Night
A 30 percent chance of snow, mainly after 5am. Mostly cloudy, with a low around 6. Wind chill values as low as -10. Northeast wind around 13 mph, with gusts as high as 21 mph.
Saturday
Snow showers. High near 13. Wind chill values as low as -8. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Saturday Night
Snow showers before 9pm, then snow showers, possibly mixed with sleet. Low around 11. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Sunday
Snow showers, mainly before noon. High near 16. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Sunday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 0. Northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 16. West northwest wind 6 to 10 mph.
Monday Night
Clear, with a low around 3. South southwest wind 5 to 9 mph.
Tuesday
Mostly sunny, with a high near 30. Southwest wind 5 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 9. Light and variable wind.
Wednesday
Partly sunny, with a high near 24. Northwest wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 3. West northwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 18. Northwest wind 6 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Saint Johns IL
 38.06°N 89.24°W
Last Update:
3:16 am CST Jan 23, 2026
Forecast Valid:
3am CST Jan 23, 2026-6pm CST Jan 29, 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