Colorado by month · 9 of 12

Colorado RV rental in September

Prime month

September falls inside Colorado's best RV window (June to September).

High country is accessible and wildflowers peak; winters bring heavy snow that closes many mountain roads and campgrounds.

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Published by PickRV

Cited primary sources

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Updated July 17, 2026

Pub July 10, 2026

September on the ground

Weather & conditions

High 78°F, Low 49°F

September is many Coloradans' favorite month — gold climbing the hillsides, elk bugling at dusk, and summer crowds gone home.

What to do in September

Aspen gold sweeping the high country from mid-month
Elk bugling in the meadows around Estes Park
Crisp-night campfires as the storm season fades

Best-fit rigs: Motorhome · Truck or van · Off-road rig

Know before you go

The first high-country snows can arrive any time after mid-month; nights at elevation drop below freezing.

Afternoon thunderstorms are common in summer; altitude sickness is real above 8,000 feet. Winter driving requires chains or 4WD.

Seasonal spectacles, sourced

What September looks like in Colorado

Timing windows below are quoted verbatim from each official source — nature shifts year to year, so always check the source before you route a trip around it.

Elk rut
Rocky Mountain National Park, Colorado
“Bugling early September through October, peak early October”
Moraine Park, Horseshoe Park + Kawuneeche Valley (NPS) · RV base: Moraine Park Campground (in-park, electric hookups, RV to 40 ft)
NPS — Rocky Mountain NP elk
Fall foliage
Colorado fall foliage
“mid-September to early October”
San Juan Mountains, Rocky Mountain National Park, Aspen area (Maroon Bells) · RV base: Moraine Park Campground (Rocky Mountain NP)
Colorado Fall Foliage

From the verified event registry

September events in Colorado

Trip notes

September tips for Colorado

Layer up: shoulder-pattern days can swing from a chilly dawn to t-shirt warmth by afternoon.
Pack rain gear and leveling mats for soft or wet sites.
Carry a weather radio and check forecasts daily — transitional months turn fast.
Daylight shrinks noticeably — plan arrivals before dusk.

Keep planning

Plan the Colorado trip

Nearby & related

Keep planning Colorado

Sourced costs, campground directories, and the places worth a detour — the next layer of Colorado trip planning.

Colorado in September — FAQ

Is September a good month for an RV trip in Colorado?

September falls inside Colorado's best RV window (June to September). Our Colorado registry tracks 4 dated events and 2 seasonal highlights for September, each with its own official source.

What's the weather like in Colorado in September?

High 78°F, Low 49°F

What is there to see in Colorado in September?

Rocky Mountain National Park, Colorado (Bugling early September through October, peak early October); Colorado fall foliage (mid-September to early October). Every window is quoted verbatim from its official source.

How much does an RV rental cost in Colorado in September?

Rates on PickRV are host-set and shown at checkout — we don't publish a fabricated "Colorado in September" average. The real, sourced costs around the rental (fuel, camping, park entry, tax) are broken down on our Colorado cost page, and the only add-ons at checkout are a flat 10% service fee and state tax, both itemized.