Greeley (CO)
September
Weather in Greeley, Colorado for September 2026
Your guide to Greeley weather in September - trends and predictions
In general, the average temperature in Greeley at the beginning of September is 29.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.9 °C by the end of September.
Greeley experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 67.7 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
28°/11°
Temperatures
23 km/h
Avg max wind
46 %
Avg humidity
Greeley Weather September
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Temperatures trend during September in Greeley
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September weather in Greeley day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /12° | 0 mm | 8 | |
| Sept. 2 | Sunny | 32° /13° | 0 mm | 8 | |
| Sept. 3 |  Partly cloudy | 32° /12° | 0 mm | 8 | |
| Sept. 4 |  Moderate rain at times | 32° /12° | 3.3 mm | 8 | |
| Sept. 5 |  Patchy rain possible | 23° /12° | 0.1 mm | 6 | |
| Sept. 6 | Sunny | 27° /8° | 0 mm | 7 | |
| Sept. 7 | Partly cloudy | 31° /12° | 0 mm | 8 | |
| Sept. 8 | Sunny | 31° /12° | 0 mm | 8 | |
| Sept. 9 | Patchy rain possible | 32° /12° | 0.3 mm | 7 | |
| Sept. 10 | Partly cloudy | 32° /14° | 0 mm | 8 | |
| Sept. 11 | Patchy rain possible | 29° /16° | 3.5 mm | 7 | |
| Sept. 12 | Partly cloudy | 30° /13° | 1.4 mm | 7 | |
| Sept. 13 | Partly cloudy | 27° /11° | 2.5 mm | 7 | |
| Sept. 14 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 15 |  Patchy light drizzle | 31° /9° | 0.4 mm | 8 | |
| Sept. 16 | Partly cloudy | 27° /11° | 2 mm | 7 | |
| Sept. 17 | Light rain shower | 26° /11° | 4 mm | 6 | |
| Sept. 18 |  Mist | 24° /7° | 0 mm | 6 | |
| Sept. 19 | Sunny | 28° /6° | 0 mm | 7 | |
| Sept. 20 |  Cloudy | 29° /9° | 0 mm | 6 | |
| Sept. 21 |  Overcast | 23° /10° | 0 mm | 5 | |
| Sept. 22 |  Heavy rain | 19° /7° | 47.8 mm | 5 | |
| Sept. 23 | Mist | 21° /6° | 0 mm | 5 | |
| Sept. 24 | Partly cloudy | 24° /8° | 0 mm | 6 | |
| Sept. 25 | Sunny | 28° /7° | 0 mm | 7 | |
| Sept. 26 | Sunny | 31° /8° | 0 mm | 8 | |
| Sept. 27 | Overcast | 28° /12° | 0 mm | 7 | |
| Sept. 28 | Sunny | 29° /11° | 2.3 mm | 7 | |
| Sept. 29 | Sunny | 30° /10° | 0 mm | 7 | |
| Sept. 30 | Cloudy | 25° /9° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Greeley 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 Greeley forecast closer to your planned date for the most up-to-date weather information.
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Greeley in September - FAQ
What are the expected maximum and minimum temperatures in Greeley during September?
Enjoy moderate daytime temperatures of up to 28° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Greeley during September?
Moderate rainfall is anticipated in Greeley during September, with a total of 67.7 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Greeley during September?
The average wind speed in Greeley during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Greeley
Explore the daily rainfall trends and prepare for Greeleys September weather 💧
Typically, Greeley has 8 rainy days in September with a total of 67.7 mm of rainfall.
UV exposure in Greeley during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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