Phoenix weather in September
Long-run climate averages for Phoenix, AZ in September, plus what the forecast models say for the days ahead.
In September, Phoenix averages 102°F by day and 76°F at night. The wettest month is usually January.
September in Phoenix averages a daytime high of 102°F and an overnight low of 76°F, which reads as hot for this part of the world. Across the whole year Phoenix sees roughly 8 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Phoenix forecast with every model compared and how much they currently agree.
Phoenix weather by month
what to expect in Phoenix through the yearHere is Phoenix's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Phoenix by season.