Month-by-month travel weather
Phoenix September weather
Phoenix, United States · September
Early month feels summer-like
Many days remain hot, but later in the month evenings can start feeling easier.
September averages at a glance
Average low
around 23–26°C
Average high
around 38–42°C
Average precipitation
around 10–25 mm
Rainy days
about 1–4 days
What to wear in September in Phoenix
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Summer clothing + sunscreen
- • Optional thin evening layer
Travel tips for visiting Phoenix in September
- • Shift longer outdoor time to later hours if evenings improve.
September weather in Phoenix — FAQ
Q. Is monsoon still active?
A. It can be, though it often eases over time (varies by year).
Explore Phoenix
These pages are connected so you can compare conditions and decide for yourself.