Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Overcast
77°F
25°C
| Humidity | 83% |
| Wind Speed | SW 8 mph |
| Barometer | 30.14 in |
| Dewpoint | 72°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 6 Aug 2:45 pm CDT |
Extended Forecast for
Herrin IL
This Afternoon
High: 84 °F
Slight Chance
T-stormsTonight
Low: 71 °F
Slight Chance
T-storms then
Chance
T-stormsFriday
High: 90 °F
Chance
ShowersFriday Night
Low: 72 °F
Slight Chance
T-storms then
Chance
ShowersSaturday
High: 92 °F
Slight Chance
ShowersSaturday Night
Low: 71 °F
Mostly Clear
Sunday
High: 94 °F
Mostly Sunny
Sunday Night
Low: 75 °F
Mostly Clear
Monday
High: 95 °F
Sunny
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. South southeast wind around 5 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 71. Light southeast wind.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 90. Calm wind becoming southwest 5 to 8 mph in the morning.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly between 1am and 4am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Saturday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph in the morning.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Mostly sunny, with a high near 94. Light south southeast wind becoming south southwest 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 75. South wind 5 to 8 mph.
Monday
Sunny, with a high near 95. South southwest wind 7 to 11 mph.
Monday Night
Mostly clear, with a low around 75. South wind around 10 mph.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 95. Southwest wind 8 to 10 mph.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 75. South southwest wind around 10 mph.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. West southwest wind 7 to 9 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Herrin IL
37.8°N 89.03°W
37.8°N 89.03°W
1:26 pm CDT Aug 6, 2026
3pm CDT Aug 6, 2026-6pm CDT Aug 12, 2026
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