Current conditions at
Mount Vernon Airport (KMVN)
Lat: 38.33°NLon: 88.85°WElev: 466ft.
Fair
65°F
18°C
| Humidity | 100% |
| Wind Speed | Calm |
| Barometer | 30.07 in (1018.1 mb) |
| Dewpoint | 65°F (18°C) |
| Visibility | 10.00 mi |
| Last update | 4 Aug 11:56 pm CDT |
Extended Forecast for
5 Miles SW Dahlgren IL
Overnight
Low: 63 °F
Mostly Clear
Wednesday
High: 90 °F
Sunny
Wednesday Night
Low: 70 °F
Mostly Clear
then Slight
Chance
T-stormsThursday
High: 86 °F
Chance
ShowersThursday Night
Low: 70 °F
Chance
T-stormsFriday
High: 87 °F
Chance
T-stormsFriday Night
Low: 70 °F
Chance
T-stormsSaturday
High: 89 °F
Slight Chance
T-stormsSaturday Night
Low: 71 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly clear, with a low around 63. Calm wind.
Wednesday
Sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms between 1am and 2am. Partly cloudy, with a low around 70. Light south southeast wind. Chance of precipitation is 20%.
Thursday
A 40 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Partly sunny, with a high near 86. Calm wind becoming south southwest around 5 mph in the afternoon.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind.
Friday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 87. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind.
Saturday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89. Light southwest wind.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Sunny, with a high near 91. Light south southwest wind increasing to 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 73. South wind around 7 mph.
Monday
Sunny, with a high near 94. Southwest wind 7 to 13 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 75. South southwest wind around 11 mph, with gusts as high as 18 mph.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. South southwest wind around 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
5 Miles SW Dahlgren IL
38.15°N 88.75°W
38.15°N 88.75°W
8:46 pm CDT Aug 4, 2026
12am CDT Aug 5, 2026-6pm CDT Aug 11, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
