Weather in Maricopa County, Arizona for September 2025
Until now, September 2025 in Maricopa County is cooler than usual, with temperatures averaging 37.6 °F, this is -2.1 °F below the typical seasonal average.
Expect cooler weather in the next days in Maricopa County with the forecast suggesting a temperature of 37.9 °F, lower than the historical average.
In general, the average temperature in Maricopa County at the beginning of September is 39.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 37.6 °F by the end of September.
Maricopa County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 28.9 mm.
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Maricopa County Weather September
Temperatures trend during September in Maricopa County
September weather in Maricopa County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 38° /28° | 9.4 mm | 9 | |
| Sept. 2 | Sunny | 39° /28° | 1.3 mm | 9 | |
| Sept. 3 | Sunny | 40° /28° | 0 mm | 10 | |
| Sept. 4 | Sunny | 40° /29° | 0.5 mm | 9 | |
| Sept. 5 | Sunny | 39° /28° | 0 mm | 9 | |
| Sept. 6 | Sunny | 41° /28° | 0 mm | 10 | |
| Sept. 7 | Sunny | 41° /28° | 0 mm | 10 | |
| Sept. 8 | Sunny | 41° /29° | 0 mm | 9 | |
| Sept. 9 | Sunny | 41° /28° | 0.4 mm | 10 | |
| Sept. 10 | Sunny | 40° /28° | 1.7 mm | 9 | |
| Sept. 11 | Sunny | 39° /28° | 0 mm | 9 | |
| Sept. 12 | Sunny | 38° /28° | 0.1 mm | 9 | |
| Sept. 13 | Sunny | 39° /26° | 2.4 mm | 9 | |
| Sept. 14 | Sunny | 39° /26° | 0 mm | 9 | |
| Sept. 15 | Sunny | 41° /24° | 0 mm | 2 | |
| Sept. 16 | Sunny | 42° /27° | 0 mm | 2 | |
| Sept. 17 |  Partly cloudy | 38° /27° | 0 mm | 1.6 | |
| Sept. 18 |  Patchy rain possible | 38° /29° | 0.1 mm | 0.8 | |
| Sept. 19 | Patchy rain possible | 35° /29° | 2.8 mm | 0 | |
| Sept. 20 | Sunny | 38° /30° | 0.1 mm | 8 | |
| Sept. 21 | Sunny | 39° /32° | 0 mm | 9 | |
| Sept. 22 | Sunny | 38° /30° | 0.1 mm | 8 | |
| Sept. 23 | Patchy rain possible | 34° /26° | 0.2 mm | 6 | |
| Sept. 24 | Sunny | 36° /28° | 0 mm | 8 | |
| Sept. 25 | Sunny | 37° /30° | 0 mm | 8 | |
| Sept. 26 | Sunny | 38° /30° | 0 mm | 8 | |
| Sept. 27 | Sunny | 39° /30° | 0 mm | 8 | |
| Sept. 28 | Sunny | 39° /25° | 0 mm | 9 | |
| Sept. 29 | Sunny | 37° /24° | 0 mm | 9 | |
| Sept. 30 | Sunny | 37° /23° | 0 mm | 9 | |
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Maricopa County in September - FAQ
September rainfall patterns in Maricopa County
UV exposure in Maricopa County during September
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Where is Maricopa County?Get accurate weather forecasts for Maricopa County, located at latitude 33.448 and longitude -112.074. Stay updated with localized weather information tailored for Maricopa County.