Sunday
Patchy fog
High:
93°F
A 10 percent chance of showers and thunderstorms after 5pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 106. Calm wind.
Mount Vernon, IL Weather - Tomorrow’s Forecast
Sunday Night
Slight chance of thunderstorms
Overnight low:
75°F
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. Calm wind.