Alamosa (CO)
September
Weather in Alamosa, Colorado for September 2025
Your guide to Alamosa weather in September - trends and predictions
In general, the average temperature in Alamosa at the beginning of September is 24.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 24.7 °F by the end of September.
Alamosa experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 43.8 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
23°/7°
Temperatures
19 km/h
Avg max wind
49 %
Avg humidity
Alamosa Weather September
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Temperatures trend during September in Alamosa
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September weather in Alamosa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 25° /10° | 0 mm | 7 | |
| Sept. 2 |  Sunny | 25° /8° | 0 mm | 7 | |
| Sept. 3 | Sunny | 26° /9° | 0 mm | 7 | |
| Sept. 4 |  Cloudy | 27° /11° | 0.9 mm | 6 | |
| Sept. 5 |  Moderate or heavy rain shower | 21° /9° | 6 mm | 5 | |
| Sept. 6 | Sunny | 22° /7° | 0 mm | 6 | |
| Sept. 7 |  Overcast | 23° /10° | 0 mm | 5 | |
| Sept. 8 | Sunny | 24° /7° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /8° | 0 mm | 7 | |
| Sept. 10 | Moderate or heavy rain shower | 24° /9° | 2.7 mm | 5 | |
| Sept. 11 | Moderate rain at times | 23° /8° | 1 mm | 5 | |
| Sept. 12 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 13 | Sunny | 25° /9° | 0 mm | 7 | |
| Sept. 14 | Sunny | 25° /6° | 0 mm | 6 | |
| Sept. 15 | Moderate rain at times | 22° /8° | 1.1 mm | 5 | |
| Sept. 16 | Moderate or heavy rain shower | 18° /8° | 2.6 mm | 4 | |
| Sept. 17 | Moderate or heavy rain shower | 21° /8° | 3 mm | 5 | |
| Sept. 18 | Partly cloudy | 21° /3° | 0 mm | 6 | |
| Sept. 19 | Sunny | 23° /4° | 0 mm | 6 | |
| Sept. 20 |  Patchy rain possible | 24° /5° | 0.1 mm | 5 | |
| Sept. 21 | Moderate or heavy rain shower | 17° /7° | 22.8 mm | 4 | |
| Sept. 22 | Patchy rain possible | 16° /6° | 3.5 mm | 4 | |
| Sept. 23 | Overcast | 19° /4° | 0 mm | 4 | |
| Sept. 24 | Partly cloudy | 21° /4° | 0 mm | 6 | |
| Sept. 25 | Sunny | 24° /5° | 0 mm | 6 | |
| Sept. 26 | Sunny | 26° /6° | 0 mm | 7 | |
| Sept. 27 | Sunny | 26° /10° | 0 mm | 7 | |
| Sept. 28 | Patchy rain possible | 25° /10° | 0.1 mm | 6 | |
| Sept. 29 | Sunny | 25° /7° | 0 mm | 7 | |
| Sept. 30 |  Thundery outbreaks possible | 26° /9° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Alamosa 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 Alamosa forecast closer to your planned date for the most up-to-date weather information.
Change Month
Alamosa in September - FAQ
What are the expected maximum and minimum temperatures in Alamosa during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Alamosa during September?
In September, Alamosa can expect light to moderate rainfall, totaling 43.8 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Alamosa during September?
The average wind speed in Alamosa during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Alamosa
Explore the daily rainfall trends and prepare for Alamosas September weather 💧
UV exposure in Alamosa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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