In general, the climate is continental, with cold, snowy winters and warm, dry summers. However, there can be significant differences in weather conditions between different areas of the Rockies, depending on elevation, latitude, and proximity to the Pacific Ocean.
In winter, the Rocky Mountains experience cold temperatures and heavy snowfall. The average January temperature in the lower elevations ranges from 15 to 30 degrees Fahrenheit (-9 to -1 degrees Celsius), while in the higher elevations it can drop below zero degrees Fahrenheit (-18 degrees Celsius). Snowfall can vary greatly from year to year, but the average annual snowfall in the lower elevations is around 100 inches (254 centimeters), while in the higher elevations it can exceed 300 inches (762 centimeters).
In summer, the Rocky Mountains experience warm, dry weather. The average July temperature in the lower elevations ranges from 60 to 70 degrees Fahrenheit (16 to 21 degrees Celsius), while in the higher elevations it can range from 40 to 50 degrees Fahrenheit (4 to 10 degrees Celsius). Precipitation in the summer is typically light, with the majority falling as afternoon thunderstorms.
Spring and fall are generally mild and pleasant in the Rocky Mountains. The average temperature in April and October ranges from 40 to 50 degrees Fahrenheit (4 to 10 degrees Celsius), with occasional periods of rain or snow.
Overall, the weather in the Rocky Mountains is diverse and can vary greatly from one location to another. It is important to be prepared for a range of weather conditions when visiting the Rockies, regardless of the time of year.