What is today's weather forecast for Vandalia, IL?

Today's forecast for Vandalia shows a low of 34 degrees Fahrenheit. A slight chance of rain before 10pm, then a chance of sprinkles between 10pm and 11pm.

What is the 7-day weather forecast for Vandalia, IL?

The 7-day forecast for Vandalia shows highs from 30 to 43 degrees and lows from 16 to 34 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Vandalia, IL this week?

Yes, rain is possible in Vandalia this week. Precipitation chances: Tuesday (20% chance), Friday (50% chance), Saturday (80% chance), Sunday (20% chance), Monday (20% chance).

How accurate is the Vandalia weather forecast?

WeatherForYou provides highly accurate Vandalia forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Vandalia, IL Weather Forecast and Current Conditions

Current Conditions

Switch to Metric Units

54°F
Feels Like 54°F

Humidity 98% Dew Point 53°F Wind WSW 2 MPH Gusts 2 Barometer 29.44 in.

Report from a MADIS/MESONET weather station 18.1 mi. WSW of central Vandalia
at 8:00 PM Tue, Nov 25, 2025

Point Forecast at a Glance

TueNov 25

20%

WedNov 26

ThuNov 27

FriNov 28

SatNov 29

80%

SunNov 30

20%

MonDec 1

20%

7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 43°F to 30°F. Unsettled weather expected with wintry mix likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 11°F below the historical average for November-December. Normal highs for this period are around 47°F with lows around 30°F.

This Date in Weather History

1950 - A great storm hit the Northern and Central Appalachians with snow and high winds. Winds reached hurricane force along eastern slopes of the Appalachians, with gusts to 100 mph at Hartford CT, 110 mph at Concord NH, and 160 mph at Mount Washington NH. Heavy rain also hit the eastern slopes, with eight inches reported at Slide Mountain NY. The western slopes were buried under heavy snow. The storm produced record snowfall totals of 27.7 inches at Pittsburgh PA, and 36.3 inches at Steubenville OH. The snow, and record cold temperatures, resulted in 160 deaths.

Vandalia, IL 7 Day Weather Forecast Details

Tuesday Nov 25

Night: A slight chance of rain before 10pm, then a chance of sprinkles between 10pm and 11pm. Cloudy during the early evening, then clearing, with a low around 34. West wind 8 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

Wednesday Nov 26

Day: Cloudy through mid morning, then gradual clearing, with a high near 43. Breezy, with a west wind 14 to 21 mph, with gusts as high as 36 mph.

Night: Partly cloudy, with a low around 24. West wind 9 to 11 mph, with gusts as high as 22 mph.

Thursday Nov 27

Day: Sunny, with a high near 40. Northwest wind 7 to 11 mph.

Night: Mostly clear, with a low around 19. Northwest wind around 6 mph becoming calm in the evening.

Friday Nov 28

Day: Sunny, with a high near 36.

Night: A 50 percent chance of snow after midnight. Cloudy, with a low around 25.

Saturday Nov 29

Day: Rain and snow. High near 37. Chance of precipitation is 80%.

Night: Rain likely, mainly before midnight. Cloudy, with a low around 26. Chance of precipitation is 70%.

Sunday Nov 30

Day: A 20 percent chance of rain. Mostly cloudy, with a high near 34.

Night: A slight chance of rain and snow. Mostly cloudy, with a low around 16. Chance of precipitation is 20%.

Monday Dec 1

Day: A slight chance of rain and snow. Partly sunny, with a high near 30. Chance of precipitation is 20%.

Night: A 20 percent chance of snow. Mostly cloudy, with a low around 16.

Tuesday Dec 2

Day: Partly sunny, with a high near 30.

About Vandalia, IL

Vandalia is a city in and the county seat of Fayette County, Illinois, United States. At the 2020 Census, the population was 7,458. The city is on the Kaskaskia River and in the early 19th century, Vandalia became the western terminus of the National Road (the first federal road) from the East Coast. The city is 60 miles (97 km) northeast of the Greater St. Louis area. Vandalia served as the state capital of Illinois from 1819 until 1839, when the seat of state government moved closer to the center of the state in Springfield. Since 1933, the Vandalia State House State Historic Site preserves and interprets the State House capital building and grounds, originally constructed in 1836.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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