Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
67°F
19°C
| Humidity | 98% |
| Wind Speed | Calm |
| Barometer | 30.07 in |
| Dewpoint | 66°F (19°C) |
| Visibility | 10.00 mi |
| Last update | 18 Aug 12:35 am CDT |
Extended Forecast for
Carterville IL
Overnight
Low: 64 °F
Patchy Fog
Tuesday
High: 88 °F
Patchy Fog
then SunnyTuesday Night
Low: 69 °F
Increasing
CloudsWednesday
High: 87 °F
Chance
T-stormsWednesday Night
Low: 68 °F
Chance
T-storms then
Showers
LikelyThursday
High: 85 °F
Chance
ShowersThursday Night
Low: 66 °F
Partly Cloudy
Friday
High: 86 °F
Sunny
Friday Night
Low: 66 °F
Mostly Clear
Detailed Forecast
Overnight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 64. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind.
Tuesday Night
Increasing clouds, with a low around 69. Light and variable wind.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 87. Calm wind becoming east southeast around 5 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Light east northeast wind. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Calm wind becoming north northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 66. Light northeast wind.
Friday
Sunny, with a high near 86. Calm wind becoming north around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 66. Calm wind.
Saturday
Sunny, with a high near 88. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 66. Light north northeast wind.
Sunday
Sunny, with a high near 86. Calm wind becoming north around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 87. Calm wind becoming south southeast around 6 mph in the morning.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Carterville IL
37.74°N 89.09°W
37.74°N 89.09°W
12:16 am CDT Aug 18, 2026
12am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
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