Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Mostly Cloudy
73°F
23°C
| Humidity | 74% |
| Wind Speed | NE 5 mph |
| Barometer | 30.09 in |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Last update | 24 Jul 4:45 pm CDT |
Extended Forecast for
Simpson IL
Heat Advisory July 26, 11:00am until July 28, 07:00pm
This Afternoon
High: 77 °F
Chance
ShowersTonight
Low: 66 °F
Slight Chance
T-storms then
Chance
ShowersSaturday
High: 85 °F
Showers
Likely then
Slight Chance
T-stormsSaturday Night
Low: 71 °F
Mostly Cloudy
Sunday
High: 92 °F
Mostly Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 95 °F
Mostly Sunny
Monday Night
Low: 77 °F
Mostly Clear
Tuesday
High: 96 °F
Mostly Sunny
Detailed Forecast
This Afternoon
A 30 percent chance of showers. Cloudy, with a steady temperature around 77. Calm wind.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.
Saturday
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 85. Calm wind becoming south around 5 mph. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 71. Calm wind.
Sunday
Mostly sunny, with a high near 92. Calm wind.
Sunday Night
Mostly clear, with a low around 72. Calm wind.
Monday
Mostly sunny, with a high near 95. Calm wind becoming southwest 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 77. South southwest wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 96. West northwest wind 3 to 8 mph.
Tuesday Night
Mostly clear, with a low around 73. Light and variable wind.
Wednesday
Mostly sunny, with a high near 92. Calm wind becoming north around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 70. Calm wind.
Thursday
Mostly sunny, with a high near 91. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 71. Calm wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Simpson IL
37.46°N 88.77°W
37.46°N 88.77°W
4:26 pm CDT Jul 24, 2026
5pm CDT Jul 24, 2026-6pm CDT Jul 31, 2026
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