What Phoenix Fall Weather Is Really Like

If you’re thinking about moving here, you’ve probably heard two things about Phoenix fall weather: it’s brutally hot, and the winters are amazing. Both are true. What nobody really tells you is how long the first one lasts before the second one shows up.

This year is a perfect example. Phoenix hit its first 100-degree day on March 18, the earliest ever recorded, and by early October the city had already logged 129 triple-digit days, the fifth most on record. The average last 100-degree day is around October 5, but the latest one ever was October 27 back in 2016, so it can drag on.

Phoenix Fall Weather: When It Actually Turns

Averages help a little. Highs run about 88 in October, 75 in November, and 67 in December and January. Overnight lows slide from the low 60s in October down to the mid-40s by December.

But averages make it sound gradual, and it usually isn’t. Earlier this month the forecast went from highs near 100 to a rainy, windy weekend to the upper 70s by midweek. One front comes through and the whole feel of the place changes in a few days.

Officially, monsoon season ended September 30, and this year it wrapped up above normal in a lot of spots around the state. That doesn’t mean the heat is done, though. Early October can still sneak up near 100, and then the first real cool-down feels like someone flipped a switch. Locals know that feeling. Everyone suddenly has the windows open and the patio furniture dusted off.

What the Good Season Is Really Like

This is the part people move here for. Mornings are cool, afternoons are warm and dry, and evenings are the kind where you end up sitting outside way longer than you planned. Winter days mostly sit in the 60s and 70s, and it rarely drops below freezing. Rain is rare too, about 7 inches a year on average, so plans don’t get canceled by weather very often.

The real shift is that your whole routine moves outdoors. Patios, walks, kids’ sports, dinner outside. Stuff you’d never think about doing in July suddenly becomes the default.

What That Means If You’re Buying

Here’s my honest take: don’t fall in love with a house in November and call it done. Everything looks great in November. The patio is perfect, the yard is perfect, you can picture every weekend out there.

Then July shows up. If you can, go back to the house on a late afternoon in the middle of summer and see what it’s actually like. Check which direction the backyard faces, how much shade the patio gets, how hot the garage and the west-facing rooms feel, and whether the AC keeps up. None of that shows up in a listing, and all of it matters when it’s 110 outside.

One more easy thing: ask the sellers what their electric bills looked like in July and August. I’ve had buyers move here in the summer and get a real shock when that first bill showed up. They had a bigger house, vaulted ceilings, and more than one AC unit, and all of that adds up fast. Every extra unit makes the shock a whole lot bigger. I have a separate AC just for our RV garage, and we hardly ever use it because it’s so expensive to run. It’s nice to have when we need it, but it doesn’t just run all day like the others when it’s hot out. A house can feel perfect in the fall and still cost a lot to keep cool in the summer, and that number is a lot more useful than a pretty patio photo.

On the flip side, if you’re coming from somewhere with real winters, the comfortable stretch here runs roughly November through April, which is about half the year. That’s a pretty good trade for plenty of people, but the other half is what tells you whether a house really works for you.

Where to Go From Here

If you want to see how different parts of the Valley compare, take a look at the Living in Phoenix page. And if you’re weighing a move and want to talk through what daily life would actually look like, reach out and we can walk through it together.

Sources: KJZZ on Phoenix’s 2026 heat season, Visit Phoenix weather averages, ABC15 on Phoenix rainfall averages.