Littleton (CO)
September
Weather in Littleton, Colorado for September 2025
Your guide to Littleton weather in September - trends and predictions
In general, the average temperature in Littleton 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.
With an average of 5 rainy days, Littleton experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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25
Dry days
5
Rainy days
0
Snow days
27°/14°
Temperatures
21 km/h
Avg max wind
35 %
Avg humidity
Littleton Weather September
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Temperatures trend during September in Littleton
See the weather trend as well as the moving average line
September weather in Littleton 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 Littleton 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 Littleton forecast closer to your planned date for the most up-to-date weather information.
Change Month
Littleton in September - FAQ
What are the expected maximum and minimum temperatures in Littleton 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 Littleton during September?
Moderate rainfall is anticipated in Littleton during September, with a total of 81.4 mm spread over approximately 5 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Littleton during September?
The average wind speed in Littleton during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Littleton
Explore the daily rainfall trends and prepare for Littletons September weather 💧
UV exposure in Littleton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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