Be Prepared for Estes Park, CO Weather
Summer days are usually sunny and warm - in the 70's and 80's - but always be prepared for sudden afternoon thunder showers. Evenings will be cool to mild - 40's and 50's.
In September the air turns crisp with chilly nights - 30's and 40's - with warming days - 60's and 70's. Temps will cool as the Fall wears on. The first snows can fly by early Fall.
Winters are not severe, but do bring warm clothing, boots, gloves and hats. Although not the daily norm, there are numerous mild days throughout the Winter months.
This is blue jean country and you'll want comfortable but sturdy shoes. If you plan on hiking the trails, good hiking boots are a must. Jackets and sweaters are recommended regardless of the season for the cool, high country evenings.