Aledo, IL Weather Forecast
Mercer County, Illinois
Seven-day outlook
39–71°F across the weekThe week runs between 46° and 71°, with Tuesday 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 64%.
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 Aledo forecast
Aledo sits at 41.1986°N, 90.7464°W in Mercer County, Illinois. 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
- Mercer County
- Coordinates
- 41.1986°N, 90.7464°W
- Population
- 3,569 · 2023 estimate
- Land area
- 2.344 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Aledo, 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 Aledo?
The nearest Doppler radar is KDVN (Davenport, IA), 30 miles to the NNE. 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 Aledo its center is about 1,800 ft above ground. That is about as close as radar coverage gets in the United States: the lowest scan is still near the ground when it reaches Aledo, so low-level rotation and the leading edge of a gust front show up on it. Aledo is closer to its radar than 71% of US cities.
The closest instrument actually measuring the air is KMLI · Moline/Quad City Intl on the ASOS/AWOS network, 21 miles away. Far enough that "current conditions" for Aledo 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 Illinois observing network as of this build.
Forecasts near Aledo
- Milan, IL19 mi
- Monmouth, IL20 mi
- Rock Island, IL21 mi
- Muscatine, IA23 mi
- Coal Valley, IL23 mi
- Moline, IL24 mi
- Galesburg, IL26 mi
- Davenport, IA26 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →