Current conditions at
Mount Vernon Airport (KMVN)
Lat: 38.33°NLon: 88.85°WElev: 466ft.
Fair
71°F
22°C
| Humidity | 61% |
| Wind Speed | Vrbl 3 mph |
| Barometer | 30.04 in (1017.4 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 11 Oct 10:56 am CDT |
Extended Forecast for
Dahlgren IL
This Afternoon
High: 85 °F
Sunny
Tonight
Low: 59 °F
Mostly Clear
Columbus Day
High: 91 °F
Becoming
SunnyMonday Night
Low: 66 °F
Clear
Tuesday
High: 93 °F
Sunny
Tuesday Night
Low: 68 °F
Mostly Clear
then Chance
T-stormsWednesday
High: 86 °F
Showers
LikelyWednesday Night
Low: 63 °F
Chance
ShowersThursday
High: 81 °F
Chance
Showers
Detailed Forecast
This Afternoon
Sunny, with a high near 85. Northwest wind around 7 mph.
Tonight
Mostly clear, with a low around 59. Light and variable wind.
Columbus Day
Partly sunny, then gradually becoming sunny, with a high near 91. Southwest wind 5 to 14 mph, with gusts as high as 18 mph.
Monday Night
Clear, with a low around 66. Southwest wind around 9 mph.
Tuesday
Sunny, with a high near 93. Southwest wind 8 to 13 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 68. Southwest wind 3 to 7 mph.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Light and variable wind becoming west southwest 5 to 8 mph in the morning. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Northeast wind around 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. East wind 8 to 13 mph becoming south southwest in the afternoon.
Thursday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 54. South wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 18 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 70. Breezy, with a northwest wind 16 to 22 mph.
Friday Night
Partly cloudy, with a low around 40. Breezy, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight.
Saturday
Mostly sunny, with a high near 61. North wind 11 to 16 mph, with gusts as high as 20 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Dahlgren IL
38.19°N 88.7°W
38.19°N 88.7°W
9:21 am CDT Oct 11, 2026
12pm CDT Oct 11, 2026-6pm CDT Oct 17, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
