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

43°F

6°C

Humidity 80%
Wind Speed Calm
Barometer 30.14 in (1020.6 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 13 Nov 10:52 pm CST
Extended Forecast for

2 Miles ENE Saint Johns IL

  • Tonight

    Tonight: Mostly clear, with a temperature rising to around 48 by 4am. South wind 3 to 6 mph.

    Low: 44 °F⇑

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 75. South southwest wind 6 to 13 mph, with gusts as high as 18 mph.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. South southwest wind 9 to 11 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76. South southwest wind 11 to 17 mph, with gusts as high as 23 mph.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 45. West southwest wind 6 to 10 mph becoming north northwest after midnight.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61. North northwest wind 5 to 8 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. Light and variable wind.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers after noon. Mostly sunny, with a high near 61. Light east wind becoming east southeast 5 to 10 mph in the morning.

    High: 61 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 48. East wind 7 to 9 mph.

    Low: 48 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a temperature rising to around 48 by 4am. South wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 75. South southwest wind 6 to 13 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 58. South southwest wind 9 to 11 mph.
Saturday
Mostly sunny, with a high near 76. South southwest wind 11 to 17 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 45. West southwest wind 6 to 10 mph becoming north northwest after midnight.
Sunday
Sunny, with a high near 61. North northwest wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 38. Light and variable wind.
Monday
A slight chance of showers after noon. Mostly sunny, with a high near 61. Light east wind becoming east southeast 5 to 10 mph in the morning.
Monday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 48. East wind 7 to 9 mph.
Tuesday
A chance of showers, mainly before noon. Partly sunny, with a high near 65. East wind 8 to 11 mph becoming south southwest in the morning.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 45. East wind 5 to 7 mph.
Wednesday
A chance of showers. Mostly cloudy, with a high near 61. East wind 6 to 9 mph becoming south in the afternoon.
Wednesday Night
Showers likely. Cloudy, with a low around 48. South southeast wind 6 to 8 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 62. South wind 8 to 13 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Saint Johns IL
 38.03°N 89.19°W
Last Update:
9:51 pm CST Nov 13, 2025
Forecast Valid:
10pm CST Nov 13, 2025-6pm CST Nov 20, 2025
 
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Additional Resources

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Chance of Precipitation