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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

69°F

21°C

Humidity 36%
Wind Speed S 10 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 14 Mar 3:52 pm CDT
Extended Forecast for

2 Miles N Saint Johns IL

Wind Advisory March 15, 10:00am until March 16, 07:00am
Click here for hazard details and duration
Wind Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 66. South southeast wind around 10 mph.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 55. South wind 8 to 15 mph, with gusts as high as 26 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 68. Breezy, with a south wind 18 to 23 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%.

    High: 68 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before 10pm, then rain and snow showers between 10pm and 1am, then a slight chance of snow showers after 1am. Some thunder is also possible. Low around 23. Breezy, with a west northwest wind around 24 mph, with gusts as high as 41 mph. Chance of precipitation is 80%.

    Low: 23 °F

    Rain/Snow and
    Breezy

  • Monday

    Monday: Mostly cloudy, with a high near 32. Breezy, with a west northwest wind around 22 mph, with gusts as high as 38 mph.

    High: 32 °F

    Mostly Cloudy
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. West northwest wind 9 to 18 mph, with gusts as high as 28 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 38. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers after 1am. Mostly cloudy, with a low around 30. South southeast wind 5 to 14 mph, with gusts as high as 23 mph.

    Low: 30 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62. South wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 66. South southeast wind around 10 mph.
Tonight
Increasing clouds, with a low around 55. South wind 8 to 15 mph, with gusts as high as 26 mph.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 68. Breezy, with a south wind 18 to 23 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%.
Sunday Night
Rain showers before 10pm, then rain and snow showers between 10pm and 1am, then a slight chance of snow showers after 1am. Some thunder is also possible. Low around 23. Breezy, with a west northwest wind around 24 mph, with gusts as high as 41 mph. Chance of precipitation is 80%.
Monday
Mostly cloudy, with a high near 32. Breezy, with a west northwest wind around 22 mph, with gusts as high as 38 mph.
Monday Night
Mostly clear, with a low around 15. West northwest wind 9 to 18 mph, with gusts as high as 28 mph.
Tuesday
Sunny, with a high near 38. Northwest wind around 7 mph becoming southwest in the afternoon.
Tuesday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 30. South southeast wind 5 to 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 62. South wind 13 to 16 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 40. South southwest wind 5 to 7 mph.
Thursday
Sunny, with a high near 71. South southwest wind 5 to 7 mph.
Thursday Night
Partly cloudy, with a low around 46. South wind around 6 mph.
Friday
Sunny, with a high near 72. South wind 6 to 8 mph becoming west in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Saint Johns IL
 38.06°N 89.24°W
Last Update:
1:26 pm CDT Mar 14, 2026
Forecast Valid:
4pm CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation