Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Overcast

79°F

26°C

Humidity 79%
Wind Speed S 6 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 25 Jul 1:56 pm CDT
Extended Forecast for

3 Miles SW Dahlgren IL

Heat Advisory July 26, 11:00am until July 28, 07:00pm
Click here for hazard details and duration
Heat Advisory
  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 85. Southwest wind 3 to 5 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 2am.  Otherwise, increasing clouds, with a low around 72. Calm wind.

    Low: 72 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: A 10 percent chance of showers and thunderstorms after 5pm.  Patchy fog before 8am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 93. Calm wind.

    High: 93 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 10 percent chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 75. Light and variable wind.

    Low: 75 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Mostly sunny and hot, with a high near 97. Light south southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South southwest wind around 9 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68. North northeast wind 5 to 9 mph.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 89. North northeast wind 3 to 8 mph.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 85. Southwest wind 3 to 5 mph.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 72. Calm wind.
Sunday
A 10 percent chance of showers and thunderstorms after 5pm. Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 93. Calm wind.
Sunday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. Light and variable wind.
Monday
Mostly sunny and hot, with a high near 97. Light south southwest wind becoming southwest 5 to 10 mph in the morning.
Monday Night
Mostly clear, with a low around 77. South southwest wind around 9 mph.
Tuesday
Sunny, with a high near 94. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 68. North northeast wind 5 to 9 mph.
Wednesday
Sunny, with a high near 89. North northeast wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 66. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 88. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 68. Light east wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Calm wind becoming west northwest around 6 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dahlgren IL
 38.17°N 88.72°W
1:46 pm CDT Jul 25, 2026
2pm CDT Jul 25, 2026-6pm CDT Jul 31, 2026
 
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Additional Resources

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