Vandalia, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Vandalia, IL in one place.
Sunny, with a high near 89. South wind 2 to 9 mph.
Local Weather Overview
This forecast page for Vandalia, 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: Oct 8, 2026 12:52 PM CDT.
The active forecast window currently covers Oct 9 to Oct 14, 2026 for Vandalia, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 9 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 12:52 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Vandalia
Friday looks like the warmest upcoming period in Vandalia at 89 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Tuesday at about 8 to 12 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 12:52 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KILX
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 59. Southeast wind around 6 mph.
Partly sunny, with a high near 83. Southeast wind 3 to 9 mph.
Rain showers likely between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1pm. Partly sunny, with a high near 75. Chance of precipitation is 70%.
Partly cloudy, with a low around 55.
Sunny, with a high near 87.
Mostly clear, with a low around 59.
A slight chance of rain showers after 1pm. Sunny, with a high near 78. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 49. Chance of precipitation is 20%.
Sunny, with a high near 74.
A slight chance of rain showers after 1am. Mostly clear, with a low around 53. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 9
|
Sunny
|
89°F |
2 to 9 mph
S
|
|
Friday Night
Oct 9
|
Mostly Clear
|
59°F |
6 mph
SE
|
|
Saturday
Oct 10
|
Partly Sunny
|
83°F |
3 to 9 mph
SE
|
|
Saturday Night
Oct 10
|
Rain Showers Likely
|
57°F |
6 to 9 mph
E
|
|
Sunday
Oct 11
|
Showers And Thunderstorms Likely
|
75°F |
5 to 9 mph
N
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
55°F |
2 mph
NW
|
|
Columbus Day
Oct 12
|
Sunny
|
87°F |
1 to 8 mph
SW
|
|
Monday Night
Oct 12
|
Mostly Clear
|
59°F |
8 mph
SW
|
|
Tuesday
Oct 13
|
Sunny then Slight Chance Rain Showers
|
78°F |
8 to 12 mph
NW
|
|
Tuesday Night
Oct 13
|
Slight Chance Rain Showers then Mostly Clear
|
49°F |
3 to 7 mph
N
|
|
Wednesday
Oct 14
|
Sunny
|
74°F |
2 to 6 mph
E
|
|
Wednesday Night
Oct 14
|
Mostly Clear then Slight Chance Rain Showers
|
53°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Vandalia.