Denver Weather in September

Averages By Month

The temperature in Denver in September sees pleasant highs of 77°F and there is the potential for an Indian summer to prolong the August warmth. Overnight lows can drop to 46°F so do bring a jacket for the evenings if visiting in September. Denver doesn’t generally see a lot of rain throughout the year compared with elsewhere. September is in the tail end of the rainier summer season with 7 days of rain average (low compared with most cities) and between 1 and 3 inches of rainfall expected throughout the month. There are 9 hours of sunshine each day on average which allows plenty of time for exploring the city or the great outdoors in the surrounding area.

September is the start of the off peak season so you should be able to find some great deals at this time of year. There is so much on offer in Denver in addition to the beautiful nature of the surrounding area. You could always visit one of the museums, galleries, malls, theatres or the baseball stadium. If you like beer, you’ll love The Denver Microbrew Tour which is a guided walking tour through downtown Denver.

High and Low Temperature in September °F

Rain Days in September

Current Weather Denver

70°F broken clouds
Local Time

Hourly 10 Days

Averages Denver

  J F M A M J J A S O N D

High °F

45° 47° 55° 63° 72° 82° 89° 87° 77° 65° 54° 43°

Low °F

18° 21° 26° 34° 45° 53° 60° 58° 46° 36° 25° 15°


7h 8h 8h 9h 10h 11h 11h 10h 9h 8h 7h 6h

Rain/Snow Days

8 9 11 10 11 8 8 9 7 7 9 9

Snow (inch)

7 6 11 8 1 0 0 0 1 4 9 9

Denver Weather by Month

Best Time to Visit Denver

Denver Denver is a great place to visit at any time of the year especially if you’re looking to be active outdoors. From hiking in the spring and fall to skiing in winter and sightseeing year round, Denver has it all!

Winters can be very unpredictable with the potential for particularly cold or mild weather on any given day.

Summer sees the most rainfall and can feel quite hot, although the humidity remains low in summer, so late spring or early fall are good in terms of consistency of the weather. Highs in spring reach up to 72°F with overnight lows in the 30s F. In fall, there’s the potential for an Indian summer with highs of up to 75°F.

Things to know about Denver

Denver is the capital city of Colorado and lies just east of the Rocky Mountains in a valley at an altitude of 5280 ft, or one mile exactly, which is why it’s known as the Mile-High City that brings along some weather pecularities.

The LoDo (short for lower downtown) district is very trendy and whilst being a historic district, today sees lots of shops, restaurants and clubs. It’s home to the historic Denver Union Station which itself features several shops, bars and restaurants. 16th Street Mall and Latimer Square are next to LoDo and are also trendy areas to visit. In addition, 16th Street Mall offers a free shuttle.

Denver Downtown buildings trees sky park
Denver Union Station Building Sign
It’s worth checking if there’s a concert on at the Red Rocks Amphitheatre which is located just outside of Denver and is one of the most unique concert venues in the world. It’s essentially a rock (in the geological sense, not the music type) structure that’s been made into an outdoor arena. It has a capacity of close to 10,000 and has seen the likes of The Beatles, Jimi Hendrix, U2, Depeche Mode and The Grateful Dead all play there.
Denver red rocks amphitheatre
Denver red rocks amphitheatre
The Brown Palace Hotel is one of the longest operating hotels in Colorado and offers public tours to highlight its place in history and outline some of its notable guests over the years. Tours are particularly popular in October with “ghost” tours conducted that feature unexplained events that have been collated over the years. You could always join a free walking tour that takes you through downtown and points out the main sights, which there are:

- Denver Art Museum and
- The Denver Center for the Performing Arts
Denver art museum
Denver Center for the performing arts

- City and County Building and
- Civic Center Park
Denver city council building
Denver Civic Center park fountain statue pillars arch building

- Pepsi Center and
- Colorado State Capitol
Denver Pepsi Center ic hockey crowd jumbotron flags
Denver Colorade state Capitol

Denver Location

Other destinations by month

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