Best Times to Visit Rocky Mountain National Park
The best time to visit Rocky Mountain National Park is from June to September when the snow is (mostly) melted and the hiking trails and attractions are accessible. Still, these four months are also the most popular times to visit, so if you'd rather experience RMNP in relative isolation and while wearing snowshoes or cross-country skis, visit between the months of October and May. Whether snow or sunshine, the park is open to the public 24 hours a day, 365 days a year, though some parts may be inaccessible.
Weather in Rocky Mountain National Park
Data sourced from the National Climatic Data Center
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June to September
The four months between June and September are peak travel season in Rocky Mountain National Park, and crowds will be as thick as the mountains are high. But it's the best time to visit to ensure that Trail Ridge Road, the park's main east-to-west thoroughfare, is open to cars and that the park's trails and attractions are open and accessible to travelers. During these months, average daytime temperatures usually hover in the 70s, though they can drop as low as the 40s in the evenings, so it's important to pack layers. Keep in mind that accommodation rates in Estes Park peak this time of year, but you can find more affordable stays at campgrounds or at the YMCA of the Rockies.
October to May
The months between October and May at Rocky Mountain National Park experience fewer crowds but they are also frequented by snow – sometimes quite a lot of it, which can hinder travelers' plans for hiking or enjoying a scenic drive. Likewise, RMNP is prone to severe cold, especially during the months of January and February, with daily averages in the 20s and 30s, and nightly temps dropping into the negatives. Still, if you're lucky, you might catch some wonderful days in early fall or late spring with at least semi-moderate temps and the park virtually to yourself.
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