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Hazardous Weather Conditions
Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Partly Cloudy
74°F
23°C
Humidity | 95% |
Wind Speed | Calm |
Barometer | 30.11 in |
Dewpoint | 73°F (23°C) |
Visibility | 10.00 mi |
Last update | 16 Aug 1:35 am CDT |
Extended Forecast for
Simpson IL
Heat Advisory August 16, 12:00pm until August 19, 07:00pm
Overnight
Low: 73 °F
Clear
Saturday
High: 97 °F
Hot
Saturday Night
Low: 74 °F
Mostly Clear
Sunday
High: 99 °F
Hot
Sunday Night
Low: 75 °F
Mostly Clear
Monday
High: 100 °F
Hot
Monday Night
Low: 76 °F
Mostly Clear
Tuesday
High: 101 °F
Hot
Tuesday Night
Low: 73 °F
Chance
Showers
Detailed Forecast
Overnight
Clear, with a low around 73. Calm wind.
Saturday
Sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind.
Saturday Night
Mostly clear, with a low around 74. Calm wind.
Sunday
Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind.
Sunday Night
Mostly clear, with a low around 75. Calm wind.
Monday
Sunny and hot, with a high near 100. Calm wind.
Monday Night
Mostly clear, with a low around 76. Calm wind.
Tuesday
Sunny and hot, with a high near 101. Light west southwest wind.
Tuesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 73. Calm wind.
Wednesday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91. Calm wind becoming north around 6 mph in the morning.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. North wind around 5 mph becoming calm in the evening.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 66. North northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. Calm wind becoming north northeast around 5 mph in the afternoon.
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ABOUT THIS FORECAST
Point Forecast:
Simpson IL
37.46°N 88.77°W
37.46°N 88.77°W
11:15 pm CDT Aug 15, 2025
1am CDT Aug 16, 2025-6pm CDT Aug 22, 2025