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Weather in Phoenix, Arizona for September 2025

Your guide to Phoenix weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Phoenix has been significantly cooler than historical averages by -2 °F, with average temperature of 37.9 °F.

  • Expect cooler weather in the next days in Phoenix with the forecast suggesting a temperature of 38.6 °F, lower than the historical average.

  • In general, the average temperature in Phoenix at the beginning of September is 39.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 39 °F by the end of September.

    • Rain 🌧️

  • Phoenix experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 28.9 mm.

    • More

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Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
38°/27°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
26 %
Avg humidity

Phoenix Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
38°
2
Sunny
39°
3
Sunny
40°
4
Sunny
40°
5
Sunny
39°
6
Sunny
41°
7
Sunny
41°
8
Sunny
41°
9
Sunny
41°
10
Sunny
40°
11
Sunny
39°
12
Sunny
38°
13
Sunny
38°
14
Sunny
39°
15
Sunny
41°
16
Sunny
39°
17
Sunny
38°
18
Sunny
38°
19
Patchy rain possible
35°
20
Patchy rain possible
35°
21
Sunny
38°
22
Sunny
39°
23
Sunny
40°
24
Sunny
42°
25
Sunny
41°
26
Sunny
38°
27
Sunny
39°
28
Sunny
39°
29
Sunny
37°
30
Sunny
37°

Temperatures trend during September in Phoenix

See the weather trend as well as the moving average line

September weather in Phoenix day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 38° /28° 9.4 mm 9
Sept. 2 Sunny
Sunny
 39° /28° 1.3 mm 9
Sept. 3 Sunny
Sunny
 40° /28° 0 mm 10
Sept. 4 Sunny
Sunny
 40° /29° 0.5 mm 9
Sept. 5 Sunny
Sunny
 39° /28° 0 mm 9
Sept. 6 Sunny
Sunny
 41° /28° 0 mm 10
Sept. 7 Sunny
Sunny
 41° /28° 0 mm 10
Sept. 8 Sunny
Sunny
 41° /29° 0 mm 9
Sept. 9 Sunny
Sunny
 41° /28° 0.4 mm 10
Sept. 10 Sunny
Sunny
 40° /28° 1.7 mm 9
Sept. 11 Sunny
Sunny
 39° /28° 0 mm 9
Sept. 12 Sunny
Sunny
 38° /28° 0.1 mm 9
Sept. 13 Sunny
Sunny
 38° /23° 0 mm 1.9
Sept. 14 Sunny
Sunny
 39° /22° 0 mm 2
Sept. 15 Sunny
Sunny
 41° /25° 0 mm 2
Sept. 16 Sunny
Sunny
 39° /26° 0 mm 2
Sept. 17 Sunny
Sunny
 38° /30° 0 mm 0
Sept. 18 Sunny
Sunny
 38° /31° 0 mm 8
Sept. 19 Patchy rain possible
Patchy rain possible
 35° /31° 0.9 mm 7
Sept. 20 Patchy rain possible
Patchy rain possible
 35° /29° 1.9 mm 7
Sept. 21 Sunny
Sunny
 38° /31° 0 mm 8
Sept. 22 Sunny
Sunny
 39° /31° 0 mm 8
Sept. 23 Sunny
Sunny
 40° /31° 0 mm 9
Sept. 24 Sunny
Sunny
 42° /32° 0 mm 9
Sept. 25 Sunny
Sunny
 41° /33° 0 mm 9
Sept. 26 Sunny
Sunny
 38° /30° 0 mm 8
Sept. 27 Sunny
Sunny
 39° /24° 0.1 mm 9
Sept. 28 Sunny
Sunny
 39° /25° 0 mm 9
Sept. 29 Sunny
Sunny
 37° /24° 0 mm 9
Sept. 30 Sunny
Sunny
 37° /23° 0 mm 9
Next
Important Notice
Our weather forecast for Phoenix 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 Phoenix forecast closer to your planned date for the most up-to-date weather information.
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Phoenix in September - FAQ

What are the expected maximum and minimum temperatures in Phoenix during September?
With daytime temperatures soaring above 38° and not dropping much below 27° at night, September in Phoenix is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Phoenix during September?
In September, Phoenix can expect light to moderate rainfall, totaling 28.9 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Phoenix during September?
The average wind speed in Phoenix during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Phoenix

Explore the daily rainfall trends and prepare for Phoenixs September weather 💧

UV exposure in Phoenix during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is Phoenix?

Get accurate weather forecasts for Phoenix, located at latitude 33.448 and longitude -112.074. Stay updated with localized weather information tailored for Phoenix.

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