Weld County (Greeley)
September
Weather in Weld County for September 2025
Your guide to Weld County weather in September - trends and predictions
In general, the average temperature in Weld County at the beginning of September is 31 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.3 °F by the end of September.
Weld County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 108.1 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
29°/11°
Temperatures
24 km/h
Avg max wind
39 %
Avg humidity
Weld County Weather September
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  32° | 2 33° | 3  34° | 4  31° | 5  25° | 6 30° | |
| 7 32° | 8 32° | 9 33° | 10 33° | 11 30° | 12 33° | 13 29° |
| 14 31° | 15  31° | 16 31° | 17 29° | 18  27° | 19 28° | 20  29° |
| 21  19° | 22  10° | 23 26° | 24 25° | 25 29° | 26 33° | 27 31° |
| 28 32° | 29 32° | 30 23° |
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Temperatures trend during September in Weld 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 | 32° /14° | 0 mm | 8 | |
| Sept. 2 | Sunny | 33° /15° | 0 mm | 8 | |
| Sept. 3 | Partly cloudy | 34° /14° | 0 mm | 8 | |
| Sept. 4 | Moderate rain at times | 31° /14° | 6.7 mm | 7 | |
| Sept. 5 | Patchy rain possible | 25° /13° | 0.1 mm | 6 | |
| Sept. 6 | Sunny | 30° /13° | 0 mm | 8 | |
| Sept. 7 | Partly cloudy | 32° /14° | 0 mm | 8 | |
| Sept. 8 | Sunny | 32° /14° | 0 mm | 8 | |
| Sept. 9 | Patchy rain possible | 33° /15° | 0.6 mm | 7 | |
| Sept. 10 | Partly cloudy | 33° /17° | 0 mm | 8 | |
| Sept. 11 | Patchy rain possible | 30° /15° | 2.6 mm | 7 | |
| Sept. 12 | Partly cloudy | 33° /13° | 0 mm | 8 | |
| Sept. 13 | Partly cloudy | 29° /12° | 0 mm | 7 | |
| Sept. 14 | Sunny | 31° /12° | 0 mm | 8 | |
| Sept. 15 | Patchy light drizzle | 31° /12° | 0.8 mm | 7 | |
| Sept. 16 | Partly cloudy | 31° /14° | 0.4 mm | 8 | |
| Sept. 17 | Light rain shower | 29° /10° | 4.2 mm | 6 | |
| Sept. 18 | Mist | 27° /4° | 0 mm | 6 | |
| Sept. 19 | Sunny | 28° /5° | 0 mm | 7 | |
| Sept. 20 | Cloudy | 29° /8° | 0 mm | 6 | |
| Sept. 21 | Overcast | 19° /8° | 0 mm | 4 | |
| Sept. 22 | Heavy rain | 10° /5° | 92.7 mm | 3 | |
| Sept. 23 | Mist | 26° /3° | 0 mm | 6 | |
| Sept. 24 | Partly cloudy | 25° /11° | 0 mm | 7 | |
| Sept. 25 | Sunny | 29° /9° | 0 mm | 7 | |
| Sept. 26 | Sunny | 33° /10° | 0 mm | 8 | |
| Sept. 27 | Overcast | 31° /16° | 0 mm | 7 | |
| Sept. 28 | Sunny | 32° /12° | 0 mm | 8 | |
| Sept. 29 | Sunny | 32° /11° | 0 mm | 8 | |
| Sept. 30 | Cloudy | 23° /9° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Weld 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 Weld County forecast closer to your planned date for the most up-to-date weather information.
Weld County in September - FAQ
What are the expected maximum and minimum temperatures in Weld County during September?
Enjoy moderate daytime temperatures of up to 29° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Weld County during September?
Significant rainfall exceeding 108.1 mm is expected in Weld County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Weld County during September?
The average wind speed in Weld County during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Weld County
Explore the daily rainfall trends and prepare for Weld Countys September weather 💧
UV exposure in Weld County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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