Arapahoe County (Littleton)
September
Weather in Arapahoe County, Colorado for September 2027
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 28.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.1 °C by the end of September.
Arapahoe County experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 64 mm.
Is September a good time to visit Arapahoe County? check out the best time to travel to Arapahoe County page.
✨ Is September a good time to visit Arapahoe County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
26°/13°
Temperatures
19 km/h
Avg max wind
44 %
Avg humidity
Arapahoe County Weather September
Move between months or click on a day
Temperatures trend during September in Arapahoe County
See the weather trend as well as the moving average line
September weather in Arapahoe County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /16° | 0 mm | 7 | |
| Sept. 2 | Sunny | 31° /14° | 0 mm | 8 | |
| Sept. 3 |  Patchy rain possible | 30° /15° | 0.1 mm | 8 | |
| Sept. 4 | Patchy rain possible | 31° /14° | 1.7 mm | 8 | |
| Sept. 5 |  Patchy light rain with thunder | 24° /14° | 2.1 mm | 6 | |
| Sept. 6 | Sunny | 27° /13° | 0 mm | 8 | |
| Sept. 7 |  Partly cloudy | 29° /16° | 0 mm | 6 | |
| Sept. 8 | Patchy rain possible | 28° /16° | 1.2 mm | 7 | |
| Sept. 9 |  Overcast | 28° /14° | 0 mm | 7 | |
| Sept. 10 | Patchy rain possible | 30° /14° | 2.1 mm | 7 | |
| Sept. 11 | Patchy rain possible | 29° /15° | 2.4 mm | 7 | |
| Sept. 12 | Overcast | 28° /15° | 0 mm | 7 | |
| Sept. 13 | Patchy rain possible | 28° /14° | 2.2 mm | 7 | |
| Sept. 14 | Patchy rain possible | 28° /15° | 2.2 mm | 5 | |
| Sept. 15 | Patchy rain possible | 27° /12° | 0.1 mm | 6 | |
| Sept. 16 |  Moderate rain | 27° /14° | 10.2 mm | 4 | |
| Sept. 17 |  Light rain | 24° /14° | 4.8 mm | 4 | |
| Sept. 18 | Patchy rain possible | 24° /11° | 1.1 mm | 4 | |
| Sept. 19 | Sunny | 26° /11° | 0.7 mm | 6 | |
| Sept. 20 | Overcast | 25° /13° | 0.4 mm | 6 | |
| Sept. 21 | Light rain | 23° /10° | 6.1 mm | 6 | |
| Sept. 22 | Moderate rain | 21° /10° | 18.8 mm | 5 | |
| Sept. 23 | Light rain | 20° /9° | 2.7 mm | 3 | |
| Sept. 24 | Patchy rain possible | 21° /12° | 2.1 mm | 4 | |
| Sept. 25 | Patchy rain possible | 26° /11° | 1.5 mm | 6 | |
| Sept. 26 | Sunny | 28° /11° | 0 mm | 6.1 | |
| Sept. 27 | Partly cloudy | 27° /15° | 0 mm | 6 | |
| Sept. 28 | Partly cloudy | 26° /14° | 0.5 mm | 5 | |
| Sept. 29 | Sunny | 24° /14° | 0.1 mm | 4 | |
| Sept. 30 | Partly cloudy | 23° /12° | 0.9 mm | 5 | |
| Next | |||||
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.
Change Month
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 26° and cooler nights around 13°. 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 64 mm spread over approximately 8 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 19 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 💧
Typically, Arapahoe County has 8 rainy days in September with a total of 64 mm of rainfall.
UV exposure in Arapahoe County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Arapahoe County
Select a location for an accurate weather forecast
More Locations Quick links
More Arapahoe County weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.