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Phoenix weather in September 2025
Expect 37°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Phoenix in September. Check more long-term weather averages for Phoenix in September before you book your next holiday to Arizona in 2025/2026.
- 3737°C max day temperature
- 11 hours of sunshine per day
- 33 days with some rainfall
- 2121°C min night temperature
- 1212 hours of daylight per day
- VHVery High heat & humidity
- 2323 mm of monthly rainfall
- 88 (Very High) UV index
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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.
Metric (°C / mm) | Imperial (°F / inches)
More about Arizona
How hot is it in Phoenix in September?
Daytime temperatures usually reach 37°C in Phoenix in September with very high heat and humidity, falling to 21°C at night.
How sunny is it in Phoenix in September?
There are normally 11 hours of bright sunshine each day in Phoenix in September - that's 88% of daylight hours.
Does it ever rain in Phoenix in September?
There are usually 3 days with some rain in Phoenix in September and the average monthly rainfall is 23mm.
Phoenix September sunrise & sunset times
Browse the sunrise and sunset times for Phoenix in September 2025. Select a month to view Phoenix sunrise and sunset times for the next 12 months.
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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