Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Light Rain and Breezy
64°F
18°C
| Humidity | 87% |
| Wind Speed | S 23 G 33 mph |
| Barometer | 29.36 in (993.9 mb) |
| Dewpoint | 60°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 15 Mar 6:52 pm CDT |
Extended Forecast for
Saint Johns IL
Tornado Watch March 15, 07:31pm until March 15, 11:00pm
Wind Advisory March 15, 07:31pm until March 16, 07:00am
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 24 °F
Breezy.
Showers then
Mostly CloudyMonday
High: 33 °F
Slight Chance
Snow Showers
and BreezyMonday Night
Low: 16 °F
Partly Cloudy
Tuesday
High: 36 °F
Sunny
Tuesday Night
Low: 29 °F
Mostly Cloudy
then Slight
Chance Snow
ShowersWednesday
High: 59 °F
Mostly Sunny
Wednesday Night
Low: 42 °F
Partly Cloudy
Thursday
High: 70 °F
Sunny
Detailed Forecast
Tonight
Showers and thunderstorms before 10pm, then a chance of showers between 10pm and 11pm. Low around 24. Breezy, with a west wind 21 to 25 mph, with gusts as high as 43 mph. Chance of precipitation is 90%.
Monday
A slight chance of snow showers between 9am and 1pm. Mostly cloudy, with a high near 33. Breezy, with a west northwest wind around 22 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 16. West northwest wind 10 to 18 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 36. Northwest wind 6 to 8 mph.
Tuesday Night
A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 29. Light south southeast wind becoming south 8 to 13 mph in the evening. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 59. Southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 42. South wind around 7 mph.
Thursday
Sunny, with a high near 70. South southwest wind 6 to 8 mph becoming northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 44. North northwest wind around 5 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 73. Southwest wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around 51. South southwest wind 6 to 8 mph.
Saturday
Sunny, with a high near 76. West northwest wind 8 to 10 mph.
Saturday Night
Mostly clear, with a low around 47. North northwest wind around 8 mph becoming northeast after midnight.
Sunday
Mostly sunny, with a high near 73. South wind 8 to 10 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Saint Johns IL
38.03°N 89.24°W
38.03°N 89.24°W
6:36 pm CDT Mar 15, 2026
7pm CDT Mar 15, 2026-6pm CDT Mar 22, 2026
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