Rocky Mountain · September · Colorado
Rocky Mountain National Park in September
September is a prime month to visit Rocky Mountain National Park. Expect peak crowds. Highs average 60°F and lows 37°F, with about 1.8 inches of rain.
September gets a prime rating at Rocky Mountain. The very best months are Jul–Sep.
Last prime month Best value
What to expect
September is prime at Rocky Mountain. Aspens peak in late September and the elk rut draws crowds to the meadows at dusk.
Start alpine hikes at dawn. Afternoon thunderstorms above the treeline are dangerous almost every summer day.
Good to know
- Best months overall: Jul–Sep.
- Closest airport: Denver (DEN), about 1.5–2 hours.
- Before you go: The park has required timed-entry permits from late May to October in recent years. Check current conditions on nps.gov.
Questions
Is September a good time to visit Rocky Mountain National Park?
September is a prime month to visit Rocky Mountain National Park. Expect peak crowds. Highs average 60°F and lows 37°F, with about 1.8 inches of rain.
What is the weather like in Rocky Mountain National Park in September?
Highs average 60°F and lows 37°F, with about 1.8 inches of rain. September is rated prime for visiting.
How crowded is Rocky Mountain National Park in September?
September brings peak crowds to Rocky Mountain National Park. Go early in the day and book lodging ahead.