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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Rocky Mountain National Park's climate page.
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
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
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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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Rocky Mountain National Park's climate page.
See the full Rocky Mountain National Park climate overview or explore weather in the United States of America.
