Maricopa County (Phoenix)
September
Weather in Maricopa County for September 2025
Your guide to Maricopa County weather in September - trends and predictions
In general, the average temperature in Maricopa County at the beginning of September is 40.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 40.9 °F by the end of September.
With an average of 3 rainy days, Maricopa County experiences minimal rainfall in September.
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27
Dry days
3
Rainy days
0
Snow days
39°/25°
Temperatures
18 km/h
Avg max wind
23 %
Avg humidity
Maricopa County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  38° | 2  39° | 3  40° | 4 40° | 5 41° | 6 41° | 7 42° |
| 8 40° | 9 42° | 10  42° | 11  40° | 12 37° | 13  39° | 14 38° |
| 15 37° | 16 39° | 17 36° | 18 37° | 19 37° | 20 35° | 21 34° |
| 22 36° | 23 38° | 24 39° | 25 41° | 26 42° | 27 42° | 28 42° |
| 29 40° | 30 40° |
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Temperatures trend during September in Maricopa 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 | Thundery outbreaks possible | 38° /27° | 12 mm | 9 | |
| Sept. 2 | Sunny | 39° /28° | 0.2 mm | 10 | |
| Sept. 3 | Partly cloudy | 40° /29° | 0 mm | 10 | |
| Sept. 4 | Partly cloudy | 40° /30° | 0 mm | 10 | |
| Sept. 5 | Sunny | 41° /29° | 0 mm | 10 | |
| Sept. 6 | Sunny | 41° /29° | 0 mm | 10 | |
| Sept. 7 | Sunny | 42° /30° | 0.1 mm | 10 | |
| Sept. 8 | Partly cloudy | 40° /29° | 0 mm | 10 | |
| Sept. 9 | Sunny | 42° /29° | 0 mm | 10 | |
| Sept. 10 | Cloudy | 42° /30° | 0 mm | 10 | |
| Sept. 11 | Overcast | 40° /31° | 0 mm | 10 | |
| Sept. 12 | Thundery outbreaks possible | 37° /29° | 0 mm | 9 | |
| Sept. 13 | Light rain shower | 39° /26° | 3.3 mm | 9 | |
| Sept. 14 | Sunny | 38° /27° | 0 mm | 10 | |
| Sept. 15 | Sunny | 37° /26° | 3 mm | 9 | |
| Sept. 16 | Sunny | 39° /25° | 0 mm | 9 | |
| Sept. 17 | Cloudy | 36° /24° | 0 mm | 9 | |
| Sept. 18 | Sunny | 37° /23° | 0 mm | 9 | |
| Sept. 19 | Sunny | 37° /22° | 0 mm | 9 | |
| Sept. 20 | Overcast | 35° /23° | 0 mm | 8 | |
| Sept. 21 | Sunny | 34° /20° | 0 mm | 8 | |
| Sept. 22 | Partly cloudy | 36° /21° | 0 mm | 9 | |
| Sept. 23 | Partly cloudy | 38° /23° | 0 mm | 9 | |
| Sept. 24 | Sunny | 39° /23° | 0 mm | 10 | |
| Sept. 25 | Sunny | 41° /24° | 0 mm | 10 | |
| Sept. 26 | Sunny | 42° /25° | 0 mm | 10 | |
| Sept. 27 | Overcast | 42° /25° | 0 mm | 10 | |
| Sept. 28 | Overcast | 42° /26° | 0 mm | 9 | |
| Sept. 29 | Partly cloudy | 40° /26° | 0 mm | 10 | |
| Sept. 30 | Sunny | 40° /24° | 0 mm | 10 | |
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Important Notice
Our weather forecast for Maricopa 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 Maricopa County forecast closer to your planned date for the most up-to-date weather information.
Maricopa County in September - FAQ
What are the expected maximum and minimum temperatures in Maricopa County during September?
With daytime temperatures soaring above 39° and not dropping much below 25° at night, September in Maricopa County is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Maricopa County during September?
In September, Maricopa County can expect light to moderate rainfall, totaling 29.6 mm across approximately 3 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Maricopa County during September?
The average wind speed in Maricopa County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Maricopa County
Explore the daily rainfall trends and prepare for Maricopa Countys September weather 💧
UV exposure in Maricopa County during September
Stay informed about UV levels for safe outdoor activities throughout the month of 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.
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