Mount Vernon, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Mount Vernon, IL in one place.
Sunny, with a high near 90. Southeast wind around 2 mph.
Local Weather Overview
This forecast page for Mount Vernon, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 27, 2026 8:31 PM CDT.
The active forecast window currently covers Aug 29 to Sep 3, 2026 for Mount Vernon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 27, 2026 8:31 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Mount Vernon
Thursday looks like the warmest upcoming period in Mount Vernon at 99 degrees F.
Saturday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Monday at about 3 to 12 mph SSW.
The forecast from Aug 29 through Sep 3 stays mostly dry.
Forecast Details
- Last updated
- Aug 27, 2026 8:31 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KVWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 66. Southeast wind around 2 mph.
Sunny, with a high near 95. South wind 1 to 10 mph.
Mostly clear, with a low around 71. South wind around 6 mph.
Sunny, with a high near 97. South southwest wind 3 to 12 mph.
Mostly clear, with a low around 74. South wind around 6 mph.
Sunny, with a high near 98. Southwest wind 3 to 8 mph.
Mostly clear, with a low around 75. South southwest wind around 5 mph.
Sunny, with a high near 98. Southwest wind 2 to 7 mph.
Mostly clear, with a low around 76. South southwest wind around 5 mph.
Sunny, with a high near 99. Southwest wind 2 to 8 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Sunny
|
90°F |
2 mph
SE
|
|
Saturday Night
Aug 29
|
Mostly Clear
|
66°F |
2 mph
SE
|
|
Sunday
Aug 30
|
Sunny
|
95°F |
1 to 10 mph
S
|
|
Sunday Night
Aug 30
|
Mostly Clear
|
71°F |
6 mph
S
|
|
Monday
Aug 31
|
Sunny
|
97°F |
3 to 12 mph
SSW
|
|
Monday Night
Aug 31
|
Mostly Clear
|
74°F |
6 mph
S
|
|
Tuesday
Sep 1
|
Sunny
|
98°F |
3 to 8 mph
SW
|
|
Tuesday Night
Sep 1
|
Mostly Clear
|
75°F |
5 mph
SSW
|
|
Wednesday
Sep 2
|
Sunny
|
98°F |
2 to 7 mph
SW
|
|
Wednesday Night
Sep 2
|
Mostly Clear
|
76°F |
5 mph
SSW
|
|
Thursday
Sep 3
|
Sunny
|
99°F |
2 to 8 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mount Vernon.
