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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 73%
Wind Speed S 17 G 28 mph
Barometer 29.88 in (1011.7 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 2 Apr 5:52 am CDT
Extended Forecast for

2 Miles N Saint Johns IL

Wind Advisory April 2, 10:00am until April 2, 07:00pm
Click here for hazard details and duration
Wind Advisory

  • Today

    Today: A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 78. Breezy, with a south wind 15 to 23 mph, with gusts as high as 43 mph. Chance of precipitation is 60%.

    High: 78 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 31 mph.

    Low: 65 °F

    Chance
    T-storms and
    Breezy then
    Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 82. South southwest wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 61. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 61 °F

    Chance
    Showers then
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 67. South southwest wind 11 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    High: 67 °F

    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. West northwest wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59. Northwest wind 7 to 11 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 37 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 64. Northwest wind 3 to 8 mph.

    High: 64 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 78. Breezy, with a south wind 15 to 23 mph, with gusts as high as 43 mph. Chance of precipitation is 60%.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 31 mph.
Friday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 82. South southwest wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 61. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Saturday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 67. South southwest wind 11 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Partly cloudy, with a low around 40. West northwest wind 7 to 11 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 59. Northwest wind 7 to 11 mph.
Sunday Night
Clear, with a low around 37. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 64. Northwest wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 40. North wind around 6 mph.
Tuesday
Mostly sunny, with a high near 60. East northeast wind 7 to 9 mph.
Tuesday Night
Mostly clear, with a low around 39. East wind around 7 mph.
Wednesday
Mostly sunny, with a high near 69. South wind 7 to 11 mph, with gusts as high as 18 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:
2:56 am CDT Apr 2, 2026
Forecast Valid:
6am CDT Apr 2, 2026-6pm CDT Apr 8, 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