Breckenridge

Rocky Mountains Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in the Rocky Mountains, the United States of America in September.

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Breckenridge Park City Estes Park Aspen

Are you planning a trip a to the Rocky Mountains, the United States of America in September and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in the Rocky Mountains in September

The Rocky Mountains, the United States of America is a region in the United States of America. September in the Rocky Mountains generally has temperatures that range from mild to warm, with precipitation levels ranging from low to moderate.

Temperatures

The average maximum daytime temperatures vary from mild in Leadville at 16°C (61°F) to warm in Bozeman at 23°C (73°F). Nighttime temperatures generally drop to 6°C (43°F) in Bozeman and 1°C (34°F) in Leadville.

To explore the conditions in the Rocky Mountains, the United States of America in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From low rainfall in Sun Valley with an average of 29 mm (1.1 in) to moderate rainfall in Vail with 52 mm (2 in).

Explore the Rocky Mountains by month

Pick a month to see the average temperature, rainfall and sunshine in the Rocky Mountains — and find the best time to visit. (based on Breckenridge)

January-1°C (30°F) February-1°C (30°F) March4°C (39°F) April7°C (45°F) May12°C (54°F) June19°C (66°F) This monthJuly21°C (70°F) August20°C (68°F) September17°C (63°F) October10°C (50°F) November4°C (39°F) December-1°C (30°F)
Best Time to Visit the Rocky Mountains →

Best Places to Visit in the Rocky Mountains in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across the Rocky Mountains.

Conditions Temperatures Precipitation
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).

Popular Destinations in the Rocky Mountains

What is the weather like in September for some of the most popular destinations in the Rocky Mountains, the United States of America?

Temperature range in the Rocky Mountains (September)

Precipitation variation in the Rocky Mountains (September)

Breckenridge

In September Breckenridge generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 2°C (36°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
20°C (68°F)
17°C (63°F)
10°C (50°F)
Min temperature
5°C (41°F)
2°C (36°F)
-3°C (27°F)
Monthly rainfall
61 mm (2.4 in)
42 mm (1.7 in)
46 mm (1.8 in)
Monthly rainy days
18 days
12 days
12 days
Weather conditions
perfect
tolerable
poor
Climate in Breckenridge →

Park City

In September Park City generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 6°C (43°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
25°C (77°F)
21°C (70°F)
13°C (55°F)
Min temperature
10°C (50°F)
6°C (43°F)
1°C (34°F)
Monthly sun hours
351 hours
299 hours
244 hours
Monthly rainfall
38 mm (1.5 in)
51 mm (2 in)
52 mm (2 in)
Monthly rainy days
10 days
10 days
14 days
Weather conditions
perfect
perfect
unpleasant
Climate in Park City →

Estes Park

In September Estes Park generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 5°C (41°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
25°C (77°F)
21°C (70°F)
14°C (57°F)
Min temperature
9°C (48°F)
5°C (41°F)
1°C (34°F)
Monthly rainfall
39 mm (1.5 in)
50 mm (2 in)
35 mm (1.4 in)
Monthly rainy days
16 days
10 days
9 days
Weather conditions
perfect
perfect
tolerable
Climate in Estes Park →

Aspen

In September Aspen generally has pleasant temperatures with maximum daytime temperatures around 19°C (66°F), minimum nighttime temperatures around 4°C (39°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
22°C (72°F)
19°C (66°F)
12°C (54°F)
Min temperature
8°C (46°F)
4°C (39°F)
-1°C (30°F)
Monthly rainfall
54 mm (2.1 in)
47 mm (1.9 in)
54 mm (2.1 in)
Monthly rainy days
16 days
12 days
13 days
Weather conditions
perfect
pleasant
unpleasant
Climate in Aspen →

Bozeman

In September Bozeman generally has high temperatures with maximum daytime temperatures around 23°C (73°F), minimum nighttime temperatures around 6°C (43°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
23°C (73°F)
15°C (59°F)
Min temperature
10°C (50°F)
6°C (43°F)
1°C (34°F)
Monthly rainfall
33 mm (1.3 in)
35 mm (1.4 in)
47 mm (1.9 in)
Monthly rainy days
9 days
9 days
11 days
Weather conditions
perfect
perfect
tolerable
Climate in Bozeman →

Is your destination not in the list? Have a look at all destinations in the Rocky Mountains, in the United States of America.

Popular cities in September

Day & night temperatures, rainfall and average weather in the Rocky Mountains in September.

City Weather Day temp Night temp Rainfall
Breckenridge 17°C (63°F) 2°C (36°F) 42 mm (1.7 in)
Park City 21°C (70°F) 6°C (43°F) 51 mm (2 in)
Estes Park 21°C (70°F) 5°C (41°F) 50 mm (2 in)
Aspen 19°C (66°F) 4°C (39°F) 47 mm (1.9 in)
Bozeman 23°C (73°F) 6°C (43°F) 35 mm (1.4 in)
Vail 18°C (64°F) 3°C (37°F) 52 mm (2 in)

The Rocky Mountains weather in September: frequently asked questions

What is the weather like in the Rocky Mountains, the United States of America in September?

the Rocky Mountains, the United States of America typically experiences tolerable weather in September, part of the season. Daytime highs in Breckenridge average around 17°C (63°F), and temperatures drop to about 2°C (36°F) at night.

What is the average temperature in the Rocky Mountains, the United States of America in September?

Average temperatures in the Rocky Mountains, the United States of America during September range from a nighttime low near 2°C (36°F) to a daytime high around 17°C (63°F) in Breckenridge.

Does the Rocky Mountains, the United States of America get a lot of rain in September?

Not particularly. Breckenridge averages just 42 mm (1.7 in) of rain in September, making it a mostly dry month for the Rocky Mountains, the United States of America.

Is September a Good Time to Visit the Rocky Mountains, the United States of America?

In our opinion, September is a good time to visit the Rocky Mountains, the United States of America with overall tolerable weather in Breckenridge.

On average, the best time to visit the Rocky Mountains, the United States of America is in June, July and August with generally perfect weather in Breckenridge. In contrast, January, February, March, April, October, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in the Rocky Mountains.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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