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.

Partly Cloudy

45°F

7°C

Humidity 81%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 28 Feb 7:52 am CST
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: A slight chance of showers between 2pm and 3pm. Increasing clouds, with a high near 66. East northeast wind 5 to 7 mph becoming south in the afternoon. Chance of precipitation is 20%.

    High: 66 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers between 7pm and 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 33. South wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 47. North northeast wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 47 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain and snow showers likely, mainly after midnight. Cloudy, with a low around 33. East northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Low: 33 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow showers before 9am, then a chance of rain showers. Cloudy, with a high near 44. East wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

    High: 44 °F

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly after midnight. Cloudy, with a low around 38. East wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    Low: 38 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 63. South southwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, with thunderstorms also possible after midnight. Cloudy, with a low around 52. South southwest wind 8 to 10 mph becoming southeast after midnight. Winds could gust as high as 18 mph.

    Low: 52 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 66. South wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 66 °F

    Showers
    Likely

Detailed Forecast

Today
A slight chance of showers between 2pm and 3pm. Increasing clouds, with a high near 66. East northeast wind 5 to 7 mph becoming south in the afternoon. Chance of precipitation is 20%.
Tonight
A slight chance of showers between 7pm and 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 33. South wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Sunday
Increasing clouds, with a high near 47. North northeast wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
Rain and snow showers likely, mainly after midnight. Cloudy, with a low around 33. East northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Monday
A chance of rain and snow showers before 9am, then a chance of rain showers. Cloudy, with a high near 44. East wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Monday Night
Showers likely, mainly after midnight. Cloudy, with a low around 38. East wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 63. South southwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Tuesday Night
Showers likely, with thunderstorms also possible after midnight. Cloudy, with a low around 52. South southwest wind 8 to 10 mph becoming southeast after midnight. Winds could gust as high as 18 mph.
Wednesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 66. South wind 9 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. South southwest wind 8 to 10 mph.
Thursday
A chance of showers. Partly sunny, with a high near 69. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 56. South wind around 8 mph.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 73. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
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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:
7:16 am CST Feb 28, 2026
Forecast Valid:
8am CST Feb 28, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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