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Vandalia, IL Weather Forecast

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Vandalia, IL Weather Forecast

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Vandalia IL weather - Clear - 46°F
Clear
46°F
Updated 7:27 am
Feels Like 48°F
Humidity 92%
Wind N/A N/A mph
Barometer  30.36 in
Dew Point 44°F
Vandalia IL weather - Clear - 8°C
Clear
8°C
Updated 7:27 am
Feels Like 9°C
Humidity 92%
Wind N/A 0 km/h
Barometer  102.8 kPa
Dew Point 6°C
WX Settings

Vandalia Weather Forecast

TODAY TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY THURSDAY THURSDAY NIGHT FRIDAY
Vandalia, IL Weather - Today Sunny Vandalia, IL Weather - Tonight Mostly Clear Vandalia, IL Weather - Sunday Mostly Sunny Vandalia, IL Weather - Sunday Night Mostly Cloudy Vandalia, IL Weather - Monday Partly Sunny Vandalia, IL Weather - Monday Night Partly Cloudy Vandalia, IL Weather - Tuesday Mostly Cloudy Vandalia, IL Weather - Tuesday Night Mostly Cloudy Vandalia, IL Weather - Wednesday Mostly Clear Vandalia, IL Weather - Thursday Mostly Clear Vandalia, IL Weather - Thursday Night Partly Cloudy Vandalia, IL Weather - Friday Partly Cloudy
Sunny Mostly Clear Mostly Sunny Mostly Cloudy Partly Sunny Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Clear Mostly Clear Partly Cloudy Partly Cloudy
Hi: 75°FHi: 24°C
 Lo: 45°FLo: 7°C Hi: 79°FHi: 26°C
 Lo: 49°FLo: 9°C Hi: 79°FHi: 26°C
 Lo: 49°FLo: 9°C Hi: 75°FHi: 24°C
Lo: 50°FLo: 10°C		 Hi: 75°FHi: 24°C
Lo: 50°FLo: 10°C		 Hi: 79°FHi: 26°C
Lo: 51°FLo: 11°C		 Hi: 79°FHi: 26°C
Lo: 51°FLo: 11°C		 Hi: 75°FHi: 24°C
Lo: 49°FLo: 9°C		 Hi: 75°FHi: 24°C
Lo: 49°FLo: 9°C
POP = Probability of Precipitation.
Weather Outlook Updated: 554 AM CDT Sat Oct 24 2026 Vandalia, IL Weather - WeatherWorld.com

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Vandalia Forecast Discussion

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Issued: 614 AM CDT Sat Oct 24 2026

Key Messages

  • A stagnant pattern remains in place keeping warm and dry conditions through the end of the week.

Aviation

/12Z TAFS THROUGH 18Z SUNDAY/... Issued at 613 AM CDT Sat Oct 24 2026

VFR conditions will prevail through the TAF period. There remains a slight chance for patchy fog around SUS and CPS early this morning, but observations the last couple of mornings have shown it clearing to VFR visibilities by 12Z.


Watches / Warnings / Advisories

/WARNINGS/ADVISORIES... MO...None. IL...None.