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Arizona weather in September 2025
Expect daytime maximum temperatures of 37°C in Arizona in September and very high heat and humidity based on long-term weather averages. There are 11 hours of sunshine per day on average.
- 37°C max day temperature
37 - 11 hours of sunshine per day
- 3 days with some rainfall
3 - 21°C min night temperature
21 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 23 mm of monthly rainfall
23 - 8 (Very High) UV index
8
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Recommended for Arizona
The September weather guide for Arizona (Phoenix) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Arizona destinations
Below are average maximum temperatures at popular countries, regions and places in Arizona in September. Select a holiday destination to see more weather parameters.
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Metric (°C / mm) | Imperial (°F / inches)
More about Arizona
How hot is it in Arizona in September?
Daytime temperatures usually reach 37°C in Phoenix, Arizona in September with very high heat and humidity, falling to 21°C at night.
How sunny is it in Arizona in September?
There are normally 11 hours of bright sunshine each day in Phoenix, Arizona in September - that's 88% of daylight hours.
Does it ever rain in Arizona in September?
There are usually 3 days with some rain in Phoenix, Arizona in September and the average monthly rainfall is 23mm.
Arizona September sunrise & sunset times
Browse the sunrise and sunset times for Arizona in September 2025. Select a month to view Arizona sunrise and sunset times for the next 12 months. The Arizona sunrise and sunset times shown below are for Phoenix.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 06:03 | 18:53 |
| Monday, 15th September 2025 | 06:12 | 18:34 |
| Tuesday, 30th September 2025 | 06:22 | 18:14 |
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