Vandalia, MO Weather Forecast
Audrain County, Missouri
Seven-day outlook
38–77°F across the weekThe week runs between 53° and 77°, with today the warmest day of it. There is no real trend across it: one day looks much like the next. Tuesday is the wettest day, peaking near 59%. 3 of the 7 days stay dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Vandalia forecast
Vandalia sits at 39.3081°N, 91.4895°W in Audrain County, Missouri. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Audrain County
- Coordinates
- 39.3081°N, 91.4895°W
- Population
- 2,959 · 2023 estimate
- Land area
- 2.244 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Vandalia, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Vandalia?
The nearest Doppler radar is KLSX (St. Louis, MO), 60 miles to the SE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Vandalia its center is about 4,600 ft above ground. That is far enough out that the beam has climbed above the lowest few thousand feet. Storm structure aloft is visible; a shallow circulation near the ground may not be, and a warning here can arrive before anything looks dramatic on the radar picture.
The closest instrument actually measuring the air is KMYJ · Mexico Mem on the ASOS/AWOS network, 20 miles away. Far enough that "current conditions" for Vandalia is an educated reading of somewhere else, worth knowing before you plan around a single temperature.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Missouri observing network as of this build.
Forecasts near Vandalia
- Bowling Green, MO16 mi
- Mexico, MO23 mi
- Montgomery City, MO23 mi
- Louisiana, MO25 mi
- Monroe City, MO27 mi
- Hannibal, MO28 mi
- Palmyra, MO34 mi
- Centralia, MO35 mi
Elsewhere in Missouri
Kansas CitySt. LouisSpringfieldColumbiaIndependenceLee's SummitAll Missouri forecasts →