Canton, MO Weather Forecast
Lewis County, Missouri
Seven-day outlook
42–73°F across the weekThe week runs between 53° and 73°, with today the warmest day of it. There is no real trend across it: one day looks much like the next. Monday is the wettest day, peaking near 57%. 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 Canton forecast
Canton sits at 40.1299°N, 91.5258°W in Lewis 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
- Lewis County
- Coordinates
- 40.1299°N, 91.5258°W
- Population
- 2,736 · 2023 estimate
- Land area
- 2.285 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Canton, 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 Canton?
The nearest Doppler radar is KLSX (St. Louis, MO), 109 miles to the SSE. 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 Canton its center is about 10,900 ft above ground. At that range the beam overshoots the layer where severe weather organizes. The radar is describing the middle of the storm, not its base , which is why a warning for Canton can look unsupported on the mosaic and still be right. Trust the warning over the picture.
The closest instrument actually measuring the air is KUIN · Quincy/Baldwin Fld on the ASOS/AWOS network, 22 miles away. Far enough that "current conditions" for Canton 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 Canton
- Quincy, IL16 mi
- Hamilton, IL20 mi
- Keokuk, IA20 mi
- Palmyra, MO23 mi
- Hannibal, MO30 mi
- Monroe City, MO35 mi
- Fort Madison, IA35 mi
- Macomb, IL50 mi
Elsewhere in Missouri
Kansas CitySt. LouisSpringfieldColumbiaIndependenceLee's SummitAll Missouri forecasts →