Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Rocky Mountain National Park Weather in September
In Rocky Mountain National Park, September brings moderate daytime temperatures around 15°C (59°F), with nights cooling to 3°C (37°F). Expect quite a bit of rainfall this month.
Rainfall in Rocky Mountain National Park in September
This month experiences about 12 days of rain according to historical data, averaging 61 mm (2.4 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Rocky Mountain National Park in September
September in Rocky Mountain National Park brings moderate temperatures, with highs of 15°C (59°F) and nights around 3°C (37°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 3°C (37°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Rocky Mountain National Park Temperature in September
Min Temperature
3°C (37°F)
Max Temperature
15°C (59°F)
Chance of Rain
38%
Precipitation
61 mm (2.4 in)
Rainy days
12 days
Rocky Mountain National Park Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rocky Mountain National Park - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Rocky Mountain National Park in September
Pack for changing conditions in Rocky Mountain National Park in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in Rocky Mountain National Park in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling6/10 -
Walking6/10 -
Barbeque5/10 -
Camping4/10 -
Outdoor sports10/10
Rocky Mountain National Park 3-Day Forecast
More climate data for Rocky Mountain National Park
See the full Rocky Mountain National Park climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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