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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

56°F

13°C

Humidity 42%
Wind Speed NW 8 mph
Barometer 30.28 in (1025.4 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 5 Apr 6:52 pm CDT
Extended Forecast for

2 Miles N Saint Johns IL

  • Tonight

    Tonight: Clear, with a low around 39. Northwest wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 64. Northwest wind 5 to 9 mph.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40. North northeast wind 6 to 8 mph.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 56. East northeast wind 8 to 10 mph.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. East wind around 7 mph.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. South wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers after 1pm. Mostly sunny, with a high near 72. South wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 72 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers after 1am. Partly cloudy, with a low around 57. South wind around 7 mph.

    Low: 57 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 39. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 64. Northwest wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 40. North northeast wind 6 to 8 mph.
Tuesday
Partly sunny, with a high near 56. East northeast wind 8 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 39. East wind around 7 mph.
Wednesday
Mostly sunny, with a high near 73. South wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 54. South wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday
A slight chance of showers after 1pm. Mostly sunny, with a high near 72. South wind 10 to 13 mph, with gusts as high as 21 mph.
Thursday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 57. South wind around 7 mph.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. South southwest wind 6 to 10 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southeast wind around 6 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. South wind 6 to 9 mph.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 61. South southeast wind around 8 mph.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. South wind 8 to 15 mph, with gusts as high as 22 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:
4:47 pm CDT Apr 5, 2026
Forecast Valid:
7pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation