Typical Run Score
56
Mixed
Phoenix · September
Running in Phoenix in September
Typical September running conditions in Phoenix — and a live Run Score so you can see how today compares with the norm.
Avg temperature
89°F
Sweltering
Avg dew point
49°F
Comfortable
Best window
6–10 AM
Local time
Phoenix · today vs the September normTemperature · dew point · wind · timing
How September compares in Phoenix
September ranks 10th of 12 months for running in Phoenix, with a typical daytime Run Score of 56 (Mixed). For reference, the best month is January (score 90) and the hardest is July (score 42). The kindest window in September is typically 6–10 AM. Precipitation falls in roughly 3% of hours this month. Use the live tool below to see how today actually compares with the September norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in Phoenix in September: FAQ
Is it good to run in Phoenix in September?
It's runnable, but at least one factor — usually heat or dew point — taxes the effort. The typical daytime Run Score is 56 (Mixed), with temperatures around 89°F (32°C) and comfortable dew points. The best window is usually 6–10 AM.
How hot is it for running in Phoenix in September?
Typical temperatures average 89°F (32°C) (Sweltering) with dew points near 49°F. Dew point — not the thermometer — usually decides how hard the run feels.
What is a good Run Score?
Scores run 0–100. 97+ is Perfect, 80–96 is Great — conditions are actively working in your favour. 65–79 (Good) is solid. 45–64 (Mixed) means at least one factor — usually heat or dew point — is taxing you. Below 45 (Poor), expect a noticeably harder effort or hold back for safety.
Why does dew point matter more than temperature?
Your body cools by evaporating sweat. When the dew point climbs above roughly 60°F, the air is too saturated for sweat to evaporate efficiently, so heat builds up even if the thermometer looks reasonable. That's why a 70°F muggy morning can feel harder than a dry 80°F afternoon.
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