Hamilton, IL Weather Forecast
Hancock County, Illinois
Seven-day outlook
43–72°F across the weekThe week runs between 51° and 72°, 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%.
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 Hamilton forecast
Hamilton sits at 40.3915°N, 91.3613°W in Hancock 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
- Hancock County
- Coordinates
- 40.3915°N, 91.3613°W
- Population
- 2,689 · 2023 estimate
- Land area
- 3.561 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Hamilton, 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 Hamilton?
The nearest Doppler radar is KDVN (Davenport, IA), 94 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 Hamilton its center is about 8,700 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 Hamilton can look unsupported on the mosaic and still be right. Trust the warning over the picture.
The closest instrument actually measuring the air is KFSW · Fort Madison Muni on the ASOS/AWOS network, 19 miles away. Far enough that "current conditions" for Hamilton 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 Hamilton
- Keokuk, IA3 mi
- Fort Madison, IA16 mi
- Canton, MO20 mi
- West Burlington, IA31 mi
- Burlington, IA31 mi
- Quincy, IL32 mi
- Macomb, IL36 mi
- Mount Pleasant, IA41 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →