Grand Junction is a home rule municipality that is the county seat of and the largest city in Mesa County, Colorado, United States. Grand Junction's population was 65,560 at the 2020 United States census, making it the most populous city in western Colorado and the 17th most populous Colorado municipality overall.
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As western Colorado's largest city, Grand Junction is the economic and cultural center of the Western Slope region. The city is a transportation hub, situated at the convergence of Interstate 70, U.S. Highway 50 and U.S. Highway 6. Grand Junction is also home to Colorado Mesa University, enrolling nearly 10,000 students annually.
The city is the anchor of the Grand Junction metropolitan area, home to over 162,000 residents as of 2025. It is located in the heart of the Grand Valley, a large Colorado River valley stretching over 30 miles (48 km) east-to-west and 5 miles (8.0 km) north-to-south. Grand Junction comprises the largest urban center between Denver and Salt Lake City, as well as the most densely populated area and the only metropolitan area in Colorado outside of the Front Range Urban Corridor.
From the Wikipedia article Grand Junction, Colorado, CC BY-SA 4.0.
Weather
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Forecast by Open-Meteo from national weather models. A forecast, not a measurement.
The past twelve months
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ERA5 reanalysis from Copernicus, via Open-Meteo. Modelled on a ~25 km grid, not measured at a station.
Air right now
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CAMS European and global air quality forecast, via Open-Meteo. Modelled on an 11–40 km grid; European AQI bands from the EEA.
Nearby on Wikipedia
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Articles with coordinates within 10 km, from English Wikipedia.
Towns around Grand Junction
Straight-line distance and compass bearing from the town centre.