Coconino County (Flagstaff)
September
Weather in Coconino County, Arizona for September 2026
Your guide to Coconino County weather in September - trends and predictions
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Until now, September 2026 in Coconino County is slightly cooler than the historical average by 0.9 °F.
The forecast for the coming days of September 2026 predicts a temperature of 20.1 °F , which is warmer than usual.
In general, the average temperature in Coconino County at the beginning of September is 24.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20 °F by the end of September.
Coconino County experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 83.4 mm.
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Temperatures
Rain 🌧️
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20
Dry days
10
Rainy days
0
Snow days
23°/14°
Temperatures
20 km/h
Avg max wind
45 %
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 | 24° /14° | 1.6 mm | 8 | |
| Sept. 2 | Sunny | 25° /14° | 6.5 mm | 8 | |
| Sept. 3 |  Partly cloudy | 25° /14° | 1.2 mm | 8 | |
| Sept. 4 | Partly cloudy | 25° /14° | 0.8 mm | 8 | |
| Sept. 5 | Sunny | 24° /13° | 19.6 mm | 8 | |
| Sept. 6 | Sunny | 25° /14° | 0 mm | 5 | |
| Sept. 7 |  Patchy light rain | 24° /14° | 1.1 mm | 7 | |
| Sept. 8 |  Patchy light rain with thunder | 25° /14° | 0.7 mm | 6 | |
| Sept. 9 |  Thundery outbreaks possible | 24° /15° | 0.3 mm | 6 | |
| Sept. 10 | Partly cloudy | 26° /14° | 0.8 mm | 8 | |
| Sept. 11 |  Cloudy | 23° /14° | 2.1 mm | 7 | |
| Sept. 12 | Sunny | 23° /13° | 0.9 mm | 6 | |
| Sept. 13 | Sunny | 22° /11° | 0.8 mm | 6 | |
| Sept. 14 | Sunny | 23° /12° | 0.7 mm | 5 | |
| Sept. 15 | Sunny | 22° /12° | 1.5 mm | 5 | |
| Sept. 16 |  Patchy rain possible | 22° /12° | 0.5 mm | 5 | |
| Sept. 17 | Partly cloudy | 21° /11° | 0.6 mm | 5 | |
| Sept. 18 | Partly cloudy | 21° /11° | 0 mm | 6 | |
| Sept. 19 | Sunny | 21° /11° | 0 mm | 7 | |
| Sept. 20 | Sunny | 21° /11° | 0 mm | 6 | |
| Sept. 21 | Thundery outbreaks possible | 18° /11° | 1.4 mm | 5 | |
| Sept. 22 | Cloudy | 20° /11° | 9.1 mm | 5 | |
| Sept. 23 | Cloudy | 23° /12° | 0.4 mm | 4 | |
| Sept. 24 | Sunny | 22° /11° | 0 mm | 4 | |
| Sept. 25 | Sunny | 23° /13° | 0.2 mm | 5 | |
| Sept. 26 | Partly cloudy | 22° /13° | 0.6 mm | 6 | |
| Sept. 27 | Partly cloudy | 21° /13° | 0.4 mm | 4 | |
| Sept. 28 |  Moderate or heavy rain shower | 18° /12° | 17.8 mm | 4 | |
| Sept. 29 | Light rain shower | 15° /7° | 9.1 mm | 6.3 | |
| Sept. 30 | Sunny | 19° /7° | 3.1 mm | 4.6 | |
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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?
Moderate rainfall is anticipated in Coconino County during September, with a total of 83.4 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
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 💧
Typically, Coconino County has 10 rainy days in September with a total of 83.4 mm of rainfall.
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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