Precipitation annually averages between a half an inch a month to just over an inch in the summer. The occasional summer breezes of 7 to 8 m.p.h. serve to freshen the days and nights. The rains that do occur are chiefly scattered light showers due to the thundershowers which develop over the nearby mountains. Relative humidity is very low during the summer, with values close to those of other dry localities such as the southern parts of New Mexico and Arizona. Wintertimes Winters in Grand Junction can only be classified as mild, and especially so for a city in Colorado.
Winter snows are fairly frequent, but mostly light and quickly melt away.
Even the infrequent snows of 4 to 8 inches, which are heavy for this area, rarely remain on the gorund for prolonged periods of time. Blizzard conditions in Grand Junction are extremely rare. Again, due to the protected locality, sudden and severe weather changes are few and far between. The sunny days are many because sunny days predominate all seasons in Grand Junction. Typical Spring and Fall Grand Junction's mild summers and equally mild winters are separated by long blossoming springs and falls splashed with blazing colors.