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Pitkin County (Aspen)
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United States weather

Weather in Pitkin County, Colorado for September 2025

Your guide to Pitkin County weather in September - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Pitkin County during September is quite rare, with fewer than 2 snowy days on average.
    According to Pitkin County snow forecast for September 2025, no snow is expected until the end of the month.

    • Temperatures

  • Until now, September 2025 in Pitkin County is slightly cooler than the historical average by -1.4 °F.

  • The forecast for the next days in Pitkin County predicts temperatures to be around 20 °F, close to the historical average.

  • In general, the average temperature in Pitkin County at the beginning of September is 21.3 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 21.4 °F by the end of September.

    • Rain 🌧️

  • Pitkin County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 118.2 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
22
Dry days
Average rainy days
7
Rainy days
Average snowy days
1
Snow days
Average temperatures
19°/2°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
49 %
Avg humidity

Pitkin County Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
23°
2
Patchy light drizzle
22°
3
Patchy rain possible
22°
4
Patchy light drizzle
21°
5
Patchy moderate snow
20°
6
Sunny
21°
7
Patchy rain possible
20°
8
Patchy rain possible
21°
9
Patchy rain possible
21°
10
Patchy rain possible
21°
11
Patchy light drizzle
18°
12
Partly cloudy
18°
13
Sunny
17°
14
Sunny
18°
15
Moderate or heavy rain with thunder
18°
16
Partly cloudy
19°
17
Sunny
17°
18
Sunny
16°
19
Sunny
18°
20
Patchy rain possible
19°
21
Patchy rain possible
16°
22
Sunny
19°
23
Sunny
23°
24
Sunny
25°
25
Sunny
24°
26
Sunny
22°
27
Sunny
23°
28
Sunny
22°
29
Patchy rain possible
14°
30
Sunny
20°

Temperatures trend during September in Pitkin County

See the weather trend as well as the moving average line

September weather in Pitkin County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
Sept. 1 Patchy rain possible
Patchy rain possible
 23° /3° 0 mm 0 cm
Sept. 2 Patchy light drizzle
Patchy light drizzle
 22° /4° 0.4 mm 0 cm
Sept. 3 Patchy rain possible
Patchy rain possible
 22° /4° 0 mm 0 cm
Sept. 4 Patchy light drizzle
Patchy light drizzle
 21° /4° 0.3 mm 0 cm
Sept. 5 Patchy moderate snow
Patchy moderate snow
 20° /2° 0.3 mm 0.1 cm
Sept. 6 Sunny
Sunny
 21° /3° 1.9 mm 0 cm
Sept. 7 Patchy rain possible
Patchy rain possible
 20° /2° 0 mm 0 cm
Sept. 8 Patchy rain possible
Patchy rain possible
 21° /3° 0.1 mm 0 cm
Sept. 9 Patchy rain possible
Patchy rain possible
 21° /3° 0.3 mm 0 cm
Sept. 10 Patchy rain possible
Patchy rain possible
 21° /3° 3.9 mm 0 cm
Sept. 11 Patchy light drizzle
Patchy light drizzle
 18° /3° 18 mm 0 cm
Sept. 12 Partly cloudy
Partly cloudy
 18° /4° 7.4 mm 0 cm
Sept. 13 Sunny
Sunny
 17° /2° 5.3 mm 0 cm
Sept. 14 Sunny
Sunny
 18° /2° 1.3 mm 0 cm
Sept. 15 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 18° /1° 3.9 mm 0 cm
Sept. 16 Partly cloudy
Partly cloudy
 19° /4° 0 mm 0 cm
Sept. 17 Sunny
Sunny
 17° /1° 0 mm 0 cm
Sept. 18 Sunny
Sunny
 16° /1° 0 mm 0 cm
Sept. 19 Sunny
Sunny
 18° /-1° 0 mm 0 cm
Sept. 20 Patchy rain possible
Patchy rain possible
 19° /1° 2.4 mm 0 cm
Sept. 21 Patchy rain possible
Patchy rain possible
 16° /1° 1.8 mm 0 cm
Sept. 22 Sunny
Sunny
 19° /-1° 0 mm 0 cm
Sept. 23 Sunny
Sunny
 23° /1° 0 mm 0 cm
Sept. 24 Sunny
Sunny
 25° /4° 0 mm 0 cm
Sept. 25 Sunny
Sunny
 24° /5° 0 mm 0 cm
Sept. 26 Sunny
Sunny
 22° /3° 0 mm 0 cm
Sept. 27 Sunny
Sunny
 23° /2° 0 mm 0 cm
Sept. 28 Sunny
Sunny
 22° /2° 0 mm 0 cm
Sept. 29 Patchy rain possible
Patchy rain possible
 14° /-3° 1 mm 0 cm
Sept. 30 Sunny
Sunny
 20° /5° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Pitkin County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Pitkin County forecast closer to your planned date for the most up-to-date weather information.
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Pitkin County in September - FAQ

What are the expected maximum and minimum temperatures in Pitkin County during September?
During September, expect a variety of temperatures with highs around 19° and lows near 2°, suitable for diverse activities and preferences.
How much rainfall should be expected in Pitkin County during September?
Significant rainfall exceeding 118.2 mm is expected in Pitkin County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Pitkin County in September 2025?
Pitkin County typically sees 0.38 cm of snowfall during September.
What are the typical wind conditions in Pitkin County during September?
The average wind speed in Pitkin County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

Pitkin County snow forecast September 2025

Track daily snowfall levels and discover Pitkin County’s snowy potential this September ❄️

September rainfall patterns in Pitkin County

Explore the daily rainfall trends and prepare for Pitkin Countys September weather 💧

UV exposure in Pitkin County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Aspen
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Location coordinates Where is Pitkin County?

Get accurate weather forecasts for Pitkin County, located at latitude 39.191 and longitude -106.818. Stay updated with localized weather information tailored for Pitkin County.

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