Grand Junction, CO Weather Forecast
Mesa County, Colorado
Seven-day outlook
41–66°F across the weekThe week runs between 41° and 66°, with tomorrow the warmest day of it. The second half leans cooling, and Monday is the coolest day in it. Sunday is the wettest day, peaking near 97%. 4 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 Grand Junction forecast
Grand Junction sits at 39.0891°N, 108.5675°W in Mesa County, Colorado. 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
- Mesa County
- Coordinates
- 39.0891°N, 108.5675°W
- Population
- 69,412 · 2023 estimate
- Land area
- 40.619 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Grand Junction, 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 Grand Junction?
The nearest Doppler radar is KGJX (Grand Junction, CO), 19 miles to the E. 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 Grand Junction its center is about 1,100 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 Grand Junction, so low-level rotation and the leading edge of a gust front show up on it. Grand Junction is closer to its radar than 86% of US cities.
The closest instrument actually measuring the air is KGJT · Grand Junction Rgnl on the ASOS/AWOS network, 3.4 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 Colorado observing network as of this build.
Forecasts near Grand Junction
- Fruita, CO10 mi
- Palisade, CO11 mi
- Delta, CO34 mi
- Orchard City, CO37 mi
- Rifle, CO53 mi
- Montrose, CO57 mi
- Silt, CO58 mi
- Moab, UT64 mi
Elsewhere in Colorado
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