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United States weather

Weather in Pitkin County, Colorado for September 2026

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

    Snow Forecast ❄️

  • With an average of 2 snowy days, Pitkin County usually enjoys a light touch of snow in September.

    • Temperatures

  • In general, the average temperature in Pitkin County at the beginning of September is 21.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.7 °C by the end of September.

    • Rain 🌧️

  • The climate of Pitkin County in September is notably wet, with an average of 12 rainy days, and a total of 138 mm of precipitation.

    • More

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

Average dry days
16
Dry days
Average rainy days
12
Rainy days
Average snowy days
2
Snow days
Average temperatures
18°/3°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
51 %
Avg humidity

Pitkin County Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
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
Patchy light rain with thunder
18°
17
Moderate or heavy rain with thunder
14°
18
Sunny
15°
19
Sunny
19°
20
Sunny
18°
21
Thundery outbreaks possible
16°
22
Mist
14°
23
Thundery outbreaks possible
13°
24
Sunny
17°
25
Sunny
20°
26
Sunny
18°
27
Cloudy
18°
28
Thundery outbreaks possible
17°
29
Sunny
16°
30
Sunny
18°

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 Patchy light rain with thunder
Patchy light rain with thunder
 18° /1° 0.8 mm 0 cm
Sept. 17 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 14° /3° 17.2 mm 0 cm
Sept. 18 Sunny
Sunny
 15° /1° 0 mm 0 cm
Sept. 19 Sunny
Sunny
 19° /1° 0 mm 0 cm
Sept. 20 Sunny
Sunny
 18° /5° 7.9 mm 0 cm
Sept. 21 Thundery outbreaks possible
Thundery outbreaks possible
 16° /2° 23.2 mm 0 cm
Sept. 22 Mist
Mist
 14° /3° 11.2 mm 0.1 cm
Sept. 23 Thundery outbreaks possible
Thundery outbreaks possible
 13° /-4° 0 mm 0 cm
Sept. 24 Sunny
Sunny
 17° /1° 0 mm 0 cm
Sept. 25 Sunny
Sunny
 20° /1° 0 mm 0 cm
Sept. 26 Sunny
Sunny
 18° /3° 0 mm 0 cm
Sept. 27 Cloudy
Cloudy
 18° /4° 0 mm 0 cm
Sept. 28 Thundery outbreaks possible
Thundery outbreaks possible
 17° /5° 24 mm 0 cm
Sept. 29 Sunny
Sunny
 16° /5° 10.4 mm 0 cm
Sept. 30 Sunny
Sunny
 18° /3° 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 18° and lows near 3°, suitable for diverse activities and preferences.

How much rainfall should be expected in Pitkin County during September?

Significant rainfall exceeding 138 mm is expected in Pitkin County during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Pitkin County in September 2026?

Pitkin County experiences an average snowfall of 0.335 cm during September, occurring over 2 days.

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 2026

Track daily snowfall levels and discover Pitkin County’s snowy potential this September ❄️
On average, Pitkin County sees 2 snowy days during September, with approximately 0.3 cm of total snowfall.

September rainfall patterns in Pitkin County

Explore the daily rainfall trends and prepare for Pitkin Countys September weather 💧
Typically, Pitkin County has 12 rainy days in September with a total of 138 mm of rainfall.

UV exposure in Pitkin County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Pitkin County
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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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