Coconino County (Flagstaff)
September
Weather in Coconino County, Arizona for September 2025
Your guide to Coconino County weather in September - trends and predictions
Until now, September 2025 in Coconino County is slightly cooler than the historical average by -1.6 °F.
The forecast for the next days in Coconino County predicts temperatures to be around 23 °F, close to the historical average.
In general, the average temperature in Coconino County at the beginning of September is 25.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22 °F by the end of September.
With an average of 3 rainy days, Coconino County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
23°/14°
Temperatures
20 km/h
Avg max wind
37 %
Avg humidity
Coconino County Weather September
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Temperatures trend during September in Coconino County
See the weather trend as well as the moving average line
September weather in Coconino County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 25° /16° | 2.3 mm | 7 | |
| Sept. 2 | Sunny | 26° /15° | 9.6 mm | 7 | |
| Sept. 3 |  Partly cloudy | 26° /16° | 1.8 mm | 7 | |
| Sept. 4 | Partly cloudy | 26° /16° | 1.2 mm | 6 | |
| Sept. 5 | Sunny | 24° /15° | 29.4 mm | 6 | |
| Sept. 6 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 7 |  Patchy light rain | 24° /14° | 1.7 mm | 6 | |
| Sept. 8 |  Patchy light rain with thunder | 25° /14° | 1.1 mm | 6 | |
| Sept. 9 |  Thundery outbreaks possible | 23° /14° | 0.3 mm | 5 | |
| Sept. 10 | Partly cloudy | 25° /14° | 0 mm | 7 | |
| Sept. 11 |  Cloudy | 23° /14° | 0 mm | 6 | |
| Sept. 12 | Sunny | 22° /13° | 0 mm | 6 | |
| Sept. 13 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 14 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 15 | Sunny | 23° /12° | 0.8 mm | 6 | |
| Sept. 16 | Sunny | 26° /15° | 0 mm | 2.1 | |
| Sept. 17 | Sunny | 27° /15° | 0 mm | 2 | |
| Sept. 18 | Cloudy | 25° /15° | 0 mm | 1.4 | |
| Sept. 19 |  Moderate rain | 19° /14° | 12.4 mm | 2 | |
| Sept. 20 | Sunny | 23° /12° | 0 mm | 2 | |
| Sept. 21 | Sunny | 24° /12° | 0 mm | 0 | |
| Sept. 22 | Sunny | 26° /14° | 0 mm | 5 | |
| Sept. 23 | Sunny | 28° /14° | 0 mm | 6 | |
| Sept. 24 | Sunny | 27° /16° | 0 mm | 6 | |
| Sept. 25 | Sunny | 25° /15° | 0 mm | 5 | |
| Sept. 26 | Sunny | 24° /12° | 0 mm | 5 | |
| Sept. 27 | Sunny | 23° /11° | 0 mm | 5 | |
| Sept. 28 | Sunny | 17° /9° | 0 mm | 4 | |
| Sept. 29 | Sunny | 14° /3° | 0 mm | 3 | |
| Sept. 30 | Cloudy | 24° /19° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Coconino 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 Coconino County forecast closer to your planned date for the most up-to-date weather information.
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Coconino County in September - FAQ
What are the expected maximum and minimum temperatures in Coconino County during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Coconino County during September?
Rainfall in Coconino County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 3 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Coconino County during September?
The average wind speed in Coconino County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Coconino County
Explore the daily rainfall trends and prepare for Coconino Countys September weather 💧
UV exposure in Coconino County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Coconino County?Get accurate weather forecasts for Coconino County, located at latitude 35.198 and longitude -111.651. Stay updated with localized weather information tailored for Coconino County.
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