Arapahoe County (Littleton)
September
Weather in Arapahoe County for September 2025
Your guide to Arapahoe County weather in September - trends and predictions
In general, the average temperature in Arapahoe County at the beginning of September is 28.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 28.9 °F by the end of September.
Arapahoe County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 81.4 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
27°/14°
Temperatures
21 km/h
Avg max wind
36 %
Avg humidity
Arapahoe County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2 31° | 3  31° | 4  29° | 5  21° | 6 27° | 7  28° |
| 8 29° | 9 29° | 10 29° | 11  28° | 12 31° | 13 28° | 14 30° |
| 15 29° | 16 28° | 17  27° | 18 27° | 19 27° | 20  29° | 21 18° |
| 22  10° | 23  24° | 24 23° | 25 30° | 26 32° | 27 30° | 28 31° |
| 29 29° | 30 27° |
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Temperatures trend during September in Arapahoe County
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 30° /18° | 0 mm | 8 | |
| Sept. 2 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 3 | Patchy rain possible | 31° /17° | 0.3 mm | 7 | |
| Sept. 4 | Patchy light rain | 29° /16° | 5.2 mm | 6 | |
| Sept. 5 | Patchy light rain with thunder | 21° /13° | 1.4 mm | 5 | |
| Sept. 6 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 7 | Partly cloudy | 28° /15° | 0 mm | 7 | |
| Sept. 8 | Partly cloudy | 29° /15° | 0 mm | 7 | |
| Sept. 9 | Patchy rain possible | 29° /16° | 0.1 mm | 6 | |
| Sept. 10 | Patchy rain possible | 29° /16° | 0.4 mm | 6 | |
| Sept. 11 | Moderate rain at times | 28° /16° | 4.4 mm | 6 | |
| Sept. 12 | Partly cloudy | 31° /15° | 0 mm | 8 | |
| Sept. 13 | Partly cloudy | 28° /15° | 0 mm | 7 | |
| Sept. 14 | Partly cloudy | 30° /15° | 0 mm | 8 | |
| Sept. 15 | Patchy rain possible | 29° /16° | 0.3 mm | 6 | |
| Sept. 16 | Patchy rain possible | 28° /16° | 0 mm | 6 | |
| Sept. 17 | Cloudy | 27° /14° | 0 mm | 6 | |
| Sept. 18 | Sunny | 27° /10° | 0 mm | 7 | |
| Sept. 19 | Sunny | 27° /11° | 0 mm | 7 | |
| Sept. 20 | Overcast | 29° /14° | 0 mm | 6 | |
| Sept. 21 | Overcast | 18° /8° | 18.1 mm | 4 | |
| Sept. 22 | Moderate rain | 10° /5° | 51.3 mm | 3 | |
| Sept. 23 | Mist | 24° /4° | 0 mm | 5 | |
| Sept. 24 | Partly cloudy | 23° /13° | 0 mm | 6 | |
| Sept. 25 | Sunny | 30° /12° | 0 mm | 8 | |
| Sept. 26 | Sunny | 32° /14° | 0 mm | 8 | |
| Sept. 27 | Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 28 | Partly cloudy | 31° /14° | 0 mm | 8 | |
| Sept. 29 | Sunny | 29° /16° | 0 mm | 7 | |
| Sept. 30 | Partly cloudy | 27° /14° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Arapahoe 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 Arapahoe County forecast closer to your planned date for the most up-to-date weather information.
Arapahoe County in September - FAQ
What are the expected maximum and minimum temperatures in Arapahoe County during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Arapahoe County during September?
Moderate rainfall is anticipated in Arapahoe County during September, with a total of 81.4 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Arapahoe County during September?
The average wind speed in Arapahoe County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Arapahoe County
Explore the daily rainfall trends and prepare for Arapahoe Countys September weather 💧
UV exposure in Arapahoe County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Arapahoe County?Get accurate weather forecasts for Arapahoe County, located at latitude 39.613 and longitude -105.017. Stay updated with localized weather information tailored for Arapahoe County.
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