The capital, Denver, has a mild, dry climate with an average of 300 sunny days a year. Spring is mild with warm days and cool evenings; summer has very warm days with low humidity and cool evening breezes. Denver often enjoys an Indian Summer right into November, while winter is cold, sunny and crisp, an average snowfall of 1,397mm (55 inches). The mountains enjoy warm summer days with cool evenings. Autumn arrives early in the high ground, with abundant snowfall from December to April and temperatures around freezing point.

Extra warm clothing, especially in the mountains, from November to March/April. Cottons and linens during the summer months, and usually a light jacket at night.