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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

N/A

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

Saint Johns IL

Freeze Watch November 2, 01:00am until November 2, 07:00am
Click here for hazard details and duration
Freeze Watch

  • Today

    Today: A 40 percent chance of showers, mainly after 11am. Cloudy, with a high near 54. Calm wind becoming west around 6 mph in the afternoon.

    High: 54 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before 8pm. Patchy frost after 3am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Slight Chance
    Showers then
    Patchy Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, sunny, with a high near 55. North wind 3 to 6 mph.

    High: 55 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 35. Calm wind becoming southwest around 5 mph after midnight.

    Low: 35 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 64. Southwest wind 6 to 10 mph.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Light and variable wind.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67. Light south southeast wind becoming south 6 to 11 mph in the morning.

    High: 67 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48. South wind around 9 mph.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71. Southwest wind 9 to 11 mph.

    High: 71 °F

    Sunny

Detailed Forecast

Today
A 40 percent chance of showers, mainly after 11am. Cloudy, with a high near 54. Calm wind becoming west around 6 mph in the afternoon.
Tonight
A 20 percent chance of showers before 8pm. Patchy frost after 3am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 34. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 55. North wind 3 to 6 mph.
Sunday Night
Clear, with a low around 35. Calm wind becoming southwest around 5 mph after midnight.
Monday
Sunny, with a high near 64. Southwest wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 39. Light and variable wind.
Tuesday
Mostly sunny, with a high near 67. Light south southeast wind becoming south 6 to 11 mph in the morning.
Tuesday Night
Mostly clear, with a low around 48. South wind around 9 mph.
Wednesday
Sunny, with a high near 71. Southwest wind 9 to 11 mph.
Wednesday Night
Clear, with a low around 42. West wind around 6 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 67. Light and variable wind becoming south southeast 5 to 9 mph in the morning.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 50. South southeast wind 7 to 10 mph.
Friday
A chance of showers. Partly sunny, with a high near 67. South wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 21 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Johns IL
 38.03°N 89.24°W
Last Update:
4:16 am CDT Nov 1, 2025
Forecast Valid:
7am CDT Nov 1, 2025-6pm CST Nov 7, 2025
 
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