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

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

A Few Clouds

38°F

3°C

Humidity 44%
Wind Speed Calm
Barometer 30.42 in (1030.5 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 28 Nov 2:52 pm CST
Extended Forecast for

5 Miles WSW Saint Johns IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 39. Calm wind.

    High: 39 °F

    Mostly Sunny

  • Tonight

    Tonight: A 50 percent chance of snow showers, mainly after 3am. Increasing clouds, with a steady temperature around 32. Calm wind becoming southeast 5 to 8 mph after midnight.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Saturday

    Saturday: Snow showers before 11am, then rain and snow showers between 11am and noon, then rain showers after noon. High near 41. Southeast wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    High: 41 °F

    Rain/Snow
    then Showers

  • Saturday Night

    Saturday Night: Showers, mainly before 9pm. Low around 26. South wind 14 to 18 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%.

    Low: 26 °F

    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 32. West northwest wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 32 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. North northwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 33. Northeast wind 3 to 6 mph.

    High: 33 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Monday Night

    Monday Night: Snow showers likely, mainly before midnight. Cloudy, with a low around 22. Light north northeast wind.

    Low: 22 °F

    Snow Showers
    Likely

  • Tuesday

    Tuesday: Partly sunny, with a high near 32. North northwest wind 3 to 6 mph.

    High: 32 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 39. Calm wind.
Tonight
A 50 percent chance of snow showers, mainly after 3am. Increasing clouds, with a steady temperature around 32. Calm wind becoming southeast 5 to 8 mph after midnight.
Saturday
Snow showers before 11am, then rain and snow showers between 11am and noon, then rain showers after noon. High near 41. Southeast wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Saturday Night
Showers, mainly before 9pm. Low around 26. South wind 14 to 18 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Sunday
Mostly cloudy, with a high near 32. West northwest wind 9 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 21. North northwest wind 5 to 8 mph becoming light and variable after midnight.
Monday
A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 33. Northeast wind 3 to 6 mph.
Monday Night
Snow showers likely, mainly before midnight. Cloudy, with a low around 22. Light north northeast wind.
Tuesday
Partly sunny, with a high near 32. North northwest wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 18. Light and variable wind.
Wednesday
Mostly sunny, with a high near 40. South wind 3 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 22. South southwest wind around 5 mph becoming light and variable.
Thursday
Partly sunny, with a high near 35. Northwest wind around 6 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Saint Johns IL
 38.01°N 89.33°W
Last Update:
1:56 pm CST Nov 28, 2025
Forecast Valid:
3pm CST Nov 28, 2025-6pm CST Dec 4, 2025
 
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Additional Resources

Radar & Satellite Image

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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