The average temperature in the Rocky Mountains varies significantly depending on the elevation and time of year. Generally, at lower elevations, summer temperatures can range from the mid-70s to mid-80s Fahrenheit (about 24 to 29 degrees Celsius), while winter temperatures can drop to the teens and single digits Fahrenheit (around -7 to -12 degrees Celsius).
As you ascend to higher elevations, the temperatures become cooler. For instance, in the high alpine regions, summer daytime temperatures may only reach the 40s and 50s Fahrenheit (approximately 4 to 15 degrees Celsius), while nighttime temperatures can plummet below freezing even in the summer. In winter, these areas can experience severe cold, with temperatures frequently falling to well below zero.
Factors such as geographic location, prevailing weather patterns, and local microclimates can also influence temperature variations across different regions of the Rockies. Thus, while you can get a general idea of average temperatures, the specifics can fluctuate widely based on both elevation and season.