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Aspen Weather in September

September in Aspen sees daytime temperatures around 19°C (66°F) and lows of 4°C (39°F) at night. Pack a rain jacket because some rainfall is likely.

Rainfall in Aspen in September

Typically around 12 days of rainfall are expected, averaging 47 mm (1.9 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Aspen in September

Aspen in September gets highs of 19°C (66°F) during the day and drops to 4°C (39°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 4°C (39°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Aspen.

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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 Aspen's climate page.

Aspen Temperature in September

Min TemperatureMin Temperature 4°C (39°F)  
Max TemperatureMax Temperature 19°C (66°F)  
Chance of RainChance of Rain 39%  
PrecipitationPrecipitation 47 mm (1.9 in)  
Rainy daysRainy days 12 days  
HumidityHumidity 51%  

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 →

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Legend 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 Aspen in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.

What To Do in Aspen in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling
10/10
Walking
10/10
Camping
5/10
Outdoor sports
10/10

Select a Month

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 Aspen's climate page.

More climate data for Aspen