Late summer · Weather & things to do
Rocky Mountain NP in August
Rocky Mountain NP edges cooler than July, with highs of 71°F (22°C), lows of 43°F (6°C) and about 1.7 in (44 mm) of rain.
At 91/100 for comfort (4th of 12), it's one of the best months to visit.
- Avg high
- 71°F (22°C)
- Avg low
- 43°F (6°C)
- Rain
- 1.7 in (44 mm)
- Humidity
- 52%
- Cloud cover
- 55%
- Daylight
- ~13 h 36 min
- Comfort score
- 91/100 · Great
What August feels like
Days are warm, averaging 71°F (22°C), easy weather for being outside from morning to evening.
Mornings start much cooler: lows average 43°F (6°C), about 16°C (28°F) below the afternoon high.
Rain is moderate at about 1.7 in (44 mm) for the month.
Plan around August
August is one of Rocky Mountain NP's best months on the climate data.
- Last warm month for a while: September highs fall to 63°F.
- Comfort holds steady from July (91 → 91/100).
- August sits inside the Jun – Sep window our Colorado Rockies route recommends.
What to pack for August
- Light, breathable clotheshighs average 71°F
- Sunscreen, sunglasses and a hatstrong sun this month
- A warm layer for eveningslows near 43°F
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Rocky Mountain NP in August
With conditions on your side, the picks below favor time outside.
Trail Ridge Road
48-mile drive topping out at 12,183 feet, with tundra overlooks the whole way.
Why now Our curated notes say it's best Jun–Sep morning.
Sprague Lake
Easy, flat loop with mirror reflections of the Continental Divide.
Why now August scores 91/100 for comfort, good conditions for being outside.
Bird & Jim
Estes Park restaurant near the Beaver Meadows entrance, with seasonal mountain cooking and a patio.
Why now Highs near 71°F and 1.7 in of monthly rain make this an easy outdoor pick.
Alberta Falls
Easy 1.6-mile round-trip hike to a 30-foot cascade on Glacier Creek.
Why now One to do outside while the weather is on your side.
Alpine Visitor Center
Highest visitor center in the National Park System, with tundra trails and a cafe.
Nearby in August
- Denver in August~56 mi · highs 89°F, 2.0 in rain · 10°C (17°F) warmer by day, about as wet
- Vail in August~60 mi · highs 75°F, 1.9 in rain · 2°C (4°F) warmer by day, about as wet
- Breckenridge in August~62 mi · highs 70°F, 1.9 in rain · similar daytime temperatures, about as wet
- Aspen in August~100 mi · highs 76°F, 1.8 in rain · 3°C (5°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~2,670 m to Rocky Mountain NP's ~2,918 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Rocky Mountain NP in August: quick answers
Is August a good time to visit Rocky Mountain NP?
Yes. On the climate data it's one of the best months, scoring 91/100. Expect highs of 71°F (22°C) and 1.7 in (44 mm) of rain. August is inside the Jun – Sep window our Colorado Rockies route recommends.
How hot is Rocky Mountain NP in August?
Average highs are 71°F (22°C) and average lows 43°F (6°C), making it the 2nd-warmest month by daytime highs.
Does it rain a lot in Rocky Mountain NP in August?
Not much: about 1.7 in (44 mm) of rain falls across August on average, the 6th-wettest month of the year. The annual total is about 21.8 in (553 mm).
What should I pack for Rocky Mountain NP in August?
Bring light, breathable clothes (highs average 71°F), sunscreen, sunglasses and a hat (strong sun this month), a warm layer for evenings (lows near 43°F) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Rocky Mountain NP
Routes in season in August
- Colorado Rockies Jun – Sep
Planning Rocky Mountain NP in August?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.