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Click for Google Map. Our GPS coordinates: 45deg 20' 29.50 N 111deg 42' 50.12 W. Ennis is located in southwestern Montana an hour from Bozeman to the northeast and Yellowstone National Park to the south. US Highway 287 runs through Ennis. To the north is I-90 (45 miles) and to the south is Yellowstone National Park (70 miles).
Ennis Average Weather. 1  In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used. 2  In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.