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

50°F

10°C

Humidity 35%
Wind Speed Vrbl 6 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 20 Feb 3:52 pm CST
Extended Forecast for

2 Miles N Saint Johns IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 47. West northwest wind around 6 mph.

    High: 47 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 29. West northwest wind around 5 mph becoming calm.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 43. Northwest wind 6 to 9 mph.

    High: 43 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 36. Breezy, with a northwest wind 13 to 20 mph, with gusts as high as 28 mph.

    High: 36 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 17. Northwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 33. North northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 17. Northwest wind around 5 mph becoming calm in the evening.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 48. South southwest wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 48 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 47. West northwest wind around 6 mph.
Tonight
Partly cloudy, with a low around 29. West northwest wind around 5 mph becoming calm.
Saturday
Partly sunny, with a high near 43. Northwest wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 23. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 36. Breezy, with a northwest wind 13 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 17. Northwest wind around 14 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 33. North northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 17. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 48. South southwest wind 5 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 39. South southwest wind around 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, with a high near 60. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 37. South southwest wind 8 to 10 mph becoming north northwest after midnight.
Thursday
A slight chance of showers. Partly sunny, with a high near 53. North northwest wind 6 to 9 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:
3:22 pm CST Feb 20, 2026
Forecast Valid:
4pm CST Feb 20, 2026-6pm CST Feb 26, 2026
 
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