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

25°F

-4°C

Humidity 85%
Wind Speed Calm
Barometer 30.13 in (1020.5 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 9 Feb 4:52 am CST
Extended Forecast for

2 Miles N Saint Johns IL

  • Today

    Today: Sunny, with a high near 52. Calm wind.

    High: 52 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 38. Calm wind becoming south southwest 5 to 8 mph in the evening.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Southwest wind around 8 mph becoming north northwest in the afternoon.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 32. North wind around 6 mph.

    Low: 32 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49. North wind 3 to 6 mph.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31. Light and variable wind.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 46. East wind 3 to 7 mph.

    High: 46 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of showers. Cloudy, with a low around 33. East wind around 6 mph.

    Low: 33 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Mostly cloudy, with a high near 45. East wind 6 to 8 mph.

    High: 45 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 52. Calm wind.
Tonight
Partly cloudy, with a low around 38. Calm wind becoming south southwest 5 to 8 mph in the evening.
Tuesday
Mostly sunny, with a high near 61. Southwest wind around 8 mph becoming north northwest in the afternoon.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 32. North wind around 6 mph.
Wednesday
Mostly sunny, with a high near 49. North wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 31. Light and variable wind.
Thursday
Mostly cloudy, with a high near 46. East wind 3 to 7 mph.
Thursday Night
A chance of showers. Cloudy, with a low around 33. East wind around 6 mph.
Friday
A slight chance of showers. Mostly cloudy, with a high near 45. East wind 6 to 8 mph.
Friday Night
A chance of showers. Mostly cloudy, with a low around 33. East northeast wind 6 to 8 mph.
Saturday
Showers likely. Cloudy, with a high near 47. East northeast wind 8 to 10 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 34. North wind around 10 mph, with gusts as high as 18 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 49. Northwest wind 8 to 11 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:
5:06 am CST Feb 9, 2026
Forecast Valid:
5am CST Feb 9, 2026-6pm CST Feb 15, 2026
 
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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