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United States weather

Weather in Denver County, Colorado for September 2025

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

    Temperatures

  • Until now, September 2025 in Denver County is cooler than usual, with temperatures averaging 26.3 °F, this is -2.9 °F below the typical seasonal average.

  • The forecast for the next days in Denver County predicts temperatures to be around 28 °F, close to the historical average.

  • In general, the average temperature in Denver County at the beginning of September is 30.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.4 °F by the end of September.

    • Rain 🌧️

  • Denver County experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 36.1 mm.

    • More

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

Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/13°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
32 %
Avg humidity

Denver County Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Cloudy
31°
2
Sunny
31°
3
Moderate or heavy rain shower
30°
4
Partly cloudy
31°
5
Sunny
27°
6
Sunny
30°
7
Sunny
31°
8
Sunny
32°
9
Overcast
29°
10
Partly cloudy
26°
11
Patchy rain possible
27°
12
Sunny
28°
13
Partly cloudy
27°
14
Moderate rain at times
25°
15
Sunny
30°
16
Patchy rain possible
20°
17
Heavy rain
23°
18
Patchy rain possible
21°
19
Sunny
25°
20
Patchy rain possible
30°
21
Sunny
30°
22
Sunny
31°
23
Partly cloudy
31°
24
Sunny
29°
25
Sunny
31°
26
Sunny
32°
27
Sunny
32°
28
Sunny
31°
29
Sunny
27°
30
Partly cloudy
24°

Temperatures trend during September in Denver County

See the weather trend as well as the moving average line

September weather in Denver County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Cloudy
Cloudy
 31° /16° 0 mm 7
Sept. 2 Sunny
Sunny
 31° /16° 0.3 mm 7
Sept. 3 Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /16° 1.5 mm 7
Sept. 4 Partly cloudy
Partly cloudy
 31° /15° 2.1 mm 7
Sept. 5 Sunny
Sunny
 27° /14° 0.2 mm 7
Sept. 6 Sunny
Sunny
 30° /13° 0 mm 8
Sept. 7 Sunny
Sunny
 31° /15° 0 mm 8
Sept. 8 Sunny
Sunny
 32° /16° 0 mm 8
Sept. 9 Overcast
Overcast
 29° /14° 0.3 mm 7
Sept. 10 Partly cloudy
Partly cloudy
 26° /14° 4 mm 6
Sept. 11 Patchy rain possible
Patchy rain possible
 27° /13° 2.1 mm 6
Sept. 12 Sunny
Sunny
 28° /13° 0 mm 7
Sept. 13 Partly cloudy
Partly cloudy
 27° /12° 1.2 mm 7
Sept. 14 Moderate rain at times
Moderate rain at times
 25° /13° 2 mm 5
Sept. 15 Sunny
Sunny
 30° /11° 0 mm 1.6
Sept. 16 Patchy rain possible
Patchy rain possible
 20° /13° 4.9 mm 1.3
Sept. 17 Heavy rain
Heavy rain
 23° /11° 20.2 mm 1.2
Sept. 18 Patchy rain possible
Patchy rain possible
 21° /12° 1.8 mm 1.3
Sept. 19 Sunny
Sunny
 25° /14° 0 mm 0
Sept. 20 Patchy rain possible
Patchy rain possible
 30° /16° 0.1 mm 5
Sept. 21 Sunny
Sunny
 30° /18° 0 mm 6
Sept. 22 Sunny
Sunny
 31° /19° 0 mm 6
Sept. 23 Partly cloudy
Partly cloudy
 31° /19° 0.1 mm 6
Sept. 24 Sunny
Sunny
 29° /20° 0 mm 6
Sept. 25 Sunny
Sunny
 31° /18° 0 mm 6
Sept. 26 Sunny
Sunny
 32° /19° 0 mm 6
Sept. 27 Sunny
Sunny
 32° /19° 0 mm 6
Sept. 28 Sunny
Sunny
 31° /20° 0 mm 7
Sept. 29 Sunny
Sunny
 27° /11° 1.7 mm 6
Sept. 30 Partly cloudy
Partly cloudy
 24° /10° 0.4 mm 6
Next
Important Notice
Our weather forecast for Denver 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 Denver County forecast closer to your planned date for the most up-to-date weather information.
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Denver County in September - FAQ

What are the expected maximum and minimum temperatures in Denver County during September?
Enjoy moderate daytime temperatures of up to 28° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Denver County during September?
In September, Denver County can expect light to moderate rainfall, totaling 36.1 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Denver County during September?
The average wind speed in Denver County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Denver County

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

UV exposure in Denver County during September

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

Get accurate weather forecasts for Denver County, located at latitude 39.739 and longitude -104.985. Stay updated with localized weather information tailored for Denver County.

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