Rocky Mountain · September
Rocky Mountain in September
September is a busy time to visit Rocky Mountain — quieter than August, busier than October.
Crowd score
How busy it gets
Approaching peak season — expect full lots by mid-morning and busy overlooks.
About 73% of this park's busiest month.
Source: NPS Visitor Use Statistics, 2023–2025
Data: NPS visitation 2023–2025 · crowd scores computed Jul 2026 · alerts checked Jul 10, 2026. How this is calculated →
Computed from federal data · Methodology by Sharon Ben-Moshe
Visitation
Typical September visits vs. the year
Typical monthly recreation visits, averaged over the most recent three full years.
Source: NPS Visitor Use Statistics, 2023–2025
Weather
September weather
- Avg high
- 69°F
- Avg low
- 39°F
- Precipitation
- 1.4"
- Sunrise
- 5:43 AM
- Sunset
- 6:10 PM
- Daylight
- 12.4h
Source: NOAA 1991–2020 climate normals, Estes Park
What's open
Rocky Mountain in September: access
Open 24 hours; Trail Ridge Road closed mid-Oct to late May
Seasonal closures may apply:
- Information
Trail Ridge Road closed for winter
Trail Ridge Road, the highest continuous paved road in the U.S., typically closes mid-October and reopens by Memorial Day.
Details on nps.gov → - Park Closure
A Fire Ban (Stage 2 Fire Restrictions) Are In Effect
Due to very high fire danger, the extended weather forecast, and current fire activity in the State of Colorado, Stage 2 Fire Restrictions are now in effect within Rocky Mountain National Park. When Stage 2 Fire Restrictions are in effect, this means that all campfires, including charcoal briquette fires are not permitted anywhere within Rocky Mountain National Park. This ban is effective beginning today, June 29, and will remain in effect until further notice.
Details on nps.gov →
Source: NPS Data API
Conditions
Current alerts
- Information
Trail Ridge Road closed for winter
Trail Ridge Road, the highest continuous paved road in the U.S., typically closes mid-October and reopens by Memorial Day.
Details on nps.gov → - Information
Update on Transponders
Due to some unexpected technical issues that are impacting recent transponder sales and renewals, Rocky Mountain National Park is temporarily pausing the sale and renewal of transponder devices. Updates will be posted on the park webpage.
Details on nps.gov → - Park Closure
A Fire Ban (Stage 2 Fire Restrictions) Are In Effect
Due to very high fire danger, the extended weather forecast, and current fire activity in the State of Colorado, Stage 2 Fire Restrictions are now in effect within Rocky Mountain National Park. When Stage 2 Fire Restrictions are in effect, this means that all campfires, including charcoal briquette fires are not permitted anywhere within Rocky Mountain National Park. This ban is effective beginning today, June 29, and will remain in effect until further notice.
Details on nps.gov →
Source: NPS Data API
Context
Rocky Mountain crowds across the year
Alternatives
Quieter nearby in September
FAQ
Rocky Mountain in September
How busy is Rocky Mountain in September?
September rates 8/10 for crowds (Busy) at Rocky Mountain National Park — about 73% of its busiest month. Typical recreation visits: 495,709.
What is the weather like at Rocky Mountain in September?
In September, Rocky Mountain averages a high of 69°F and a low of 39°F, with about 1.4 inches of precipitation.