Dillon, MT Weather Forecast
Beaverhead County, Montana
Seven-day outlook
25–49°F across the weekThe week runs between 25° and 49°, with tomorrow the warmest day of it. The second half leans cooling, and Sunday is the coolest day in it. Sunday is the wettest day, peaking near 79%. 5 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 Dillon forecast
Dillon sits at 45.2179°N, 112.6346°W in Beaverhead County, Montana. 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
- Beaverhead County
- Coordinates
- 45.2179°N, 112.6346°W
- Population
- 4,176 · 2023 estimate
- Land area
- 1.898 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Dillon, 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 Dillon?
The nearest Doppler radar is KMSX (Missoula, MT), 142 miles to the NNW. 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 Dillon its center is about 16,600 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 Dillon can look unsupported on the mosaic and still be right. Trust the warning over the picture.
The closest instrument actually measuring the air is KDLN · Dillon Arpt on the ASOS/AWOS network, 4.8 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
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 Montana observing network as of this build.
Forecasts near Dillon
- Butte, MT47 mi
- Salmon, ID61 mi
- Anaconda-Deer Lodge County, MT65 mi
- Belgrade, MT81 mi
- Deer Lodge, MT82 mi
- Bozeman, MT83 mi
- St. Anthony, ID98 mi
- Helena, MT100 mi
Elsewhere in Montana
BillingsMissoulaGreat FallsBozemanButteHelenaAll Montana forecasts →