Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Overcast

25°F

-4°C

Humidity 81%
Wind Speed NE 7 mph
Barometer 30.48 in (1032.4 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 1 Dec 2:52 am CST
Extended Forecast for

2 Miles N Saint Johns IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 21. Northeast wind 3 to 5 mph.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of snow showers, mainly after 4pm.  Cloudy, with a high near 34. North wind 3 to 7 mph.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Monday Night

    Monday Night: Snow showers, mainly before midnight.  Low around 22. Calm wind becoming northwest 5 to 8 mph in the evening.  Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 22 °F

    Snow Showers
    then Chance
    Snow Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 33. Northwest wind 5 to 8 mph becoming calm  in the afternoon.

    High: 33 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Calm wind becoming south around 6 mph after midnight.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41. South southwest wind 6 to 10 mph.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 20. South southwest wind 5 to 10 mph becoming north northwest after midnight.

    Low: 20 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 29. North northwest wind 5 to 10 mph becoming light north northeast  in the afternoon.

    High: 29 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of snow showers after midnight.  Mostly cloudy, with a low around 19. Calm wind.

    Low: 19 °F

    Mostly Cloudy
    then Chance
    Snow Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 21. Northeast wind 3 to 5 mph.
Monday
A 40 percent chance of snow showers, mainly after 4pm. Cloudy, with a high near 34. North wind 3 to 7 mph.
Monday Night
Snow showers, mainly before midnight. Low around 22. Calm wind becoming northwest 5 to 8 mph in the evening. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Tuesday
Mostly sunny, with a high near 33. Northwest wind 5 to 8 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 21. Calm wind becoming south around 6 mph after midnight.
Wednesday
Mostly sunny, with a high near 41. South southwest wind 6 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 20. South southwest wind 5 to 10 mph becoming north northwest after midnight.
Thursday
Partly sunny, with a high near 29. North northwest wind 5 to 10 mph becoming light north northeast in the afternoon.
Thursday Night
A chance of snow showers after midnight. Mostly cloudy, with a low around 19. Calm wind.
Friday
A chance of snow showers before noon, then a chance of rain showers. Mostly cloudy, with a high near 37. Calm wind becoming south around 5 mph.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 26. Calm wind becoming southwest around 5 mph after midnight.
Saturday
Partly sunny, with a high near 42. Southwest wind 5 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 28. Light and variable wind becoming west around 6 mph after midnight.
Sunday
Mostly cloudy, with a high near 39. Northwest wind 6 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Saint Johns IL
 38.06°N 89.24°W
3:22 am CST Dec 1, 2025
3am CST Dec 1, 2025-6pm CST Dec 7, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database