Arizona home maintenance checklist

Around Phoenix the first 32°F night lands about December 13 on average, so have hoses off, spigots drained, and the shut-off closed by November 29. "Average" is the trap — half of all years freeze EARLIER than that date, and a single hard night is enough to split a hose bib you won't notice until spring. The frost-free stretch here runs roughly 320 days, from January 27 to December 13.

The coldest month around Phoenix averages a 46°F low, and it only takes one night below freezing. Three habits cover it: insulate every exposed run (garage, crawlspace, exterior walls), never let the house drop below 55F even when you're away, and open the cabinets under sinks on the coldest nights so warm air reaches the pipe inside the wall. The pipe that bursts is almost always the one you couldn't see.

Phoenix averages about 169 days a year at or above 90°F, peaking around a 107°F normal high — the AC here runs long enough that maintenance pays back fast. Three free wins: change the filter twice a season rather than once, clear leaves and debris off the outdoor condenser, and check the attic — if it's over 140°F up there, ventilation is your problem, not the air conditioner. The paid win with the fastest payback is shading west-facing windows; an unshaded west window in July gains about as much heat as a small space heater.

Twice a year is the working rule — late spring and late autumn — and Phoenix's roughly 7.2 inches of annual precipitation is what makes it non-negotiable. Even in a drier climate it's the concentrated storm runoff that does foundation damage, not the yearly total. Add a pass after any big storm, and check that downspouts discharge at least four feet from the house — most water-in-the-basement calls trace back to that one detail.

Three layers: a 5-foot non-combustible "ember zone" right against the house (no mulch, firewood, doormats); 1/8-inch metal mesh on every attic and crawlspace vent so embers can't slip in; and a 30-foot defensible perimeter with grass mowed low and tree canopies thinned. A pre-staged go-bag is the fourth thing — when the order comes you have minutes, not hours.

Monsoon runs roughly June 15 to September 30. Before the first storm, clear washes, French drains, and any dry creek beds so the water has a path away from the foundation. Mid-season, walk flat and patio roofs after each storm to spot ponding.

Open once nights stay reliably above 50°F — around Phoenix the last spring freeze averages January 27, so a few weeks after that is the honest earliest. Close before the first hard freeze, which averages December 13: lower the water below the skimmer, blow out the lines, add anti-freeze plugs, secure the cover. A frozen pool line splits invisibly underground and you find out in May with a flooded yard.

A weekend per season handles about 80% of what matters, and around Phoenix the calendar sets itself: the autumn pass has to finish before the first freeze around December 13, and the spring pass starts once the last freeze passes around January 27. Layer in monthly safety checks (smoke and CO test, a glance at the breaker panel) and one yearly walk of the big shut-offs. The pattern that fails homeowners isn't doing too little — it's doing nothing for two years and then trying to catch up at once.

Most of it is DIY — gutters, filters, windows, sealants, irrigation, pest perimeter. Hire a pro for: anything on the roof past a quick eyeball with binoculars, gas-line work, the main electrical panel, and any plumbing repair that involves soldering or splicing into a main. There's no prize for bravery on those — the cost of a mistake is much higher than the cost of the call.