10/14/2026
Flagstaff falls below freezing on 204 nights a year. Your house is up there for all of them. You may not be.
There are things to be aware of when owning a second home in a winter climate and every generic winterizing article online is written for a house somebody lives in year round.
Here is what the numbers say. The average October overnight low in Flagstaff is 31.5 degrees, so the season has already started. Eighteen October nights reach freezing in an average year, then 28 in November and 30 in December. It is an easy thing to be a month late to.
The part most people miss is the daytime. Fourteen days a year the temperature never climbs above freezing at all, from one night straight through to the next. A pipe that froze at four in the morning does not quietly thaw at lunchtime on those days. Seven days a year the low reaches zero or below, and the coldest reading in the record is thirty below, from January 1937, in a record that runs back to 1898.
So, five things on the way out the door. Disconnect the garden hoses. Find the main shutoff and check that it actually turns. Open the cabinet doors under any sink on an exterior wall. Drain the irrigation and any pool supply line. And leave the heat at 55 degrees, which is the lowest the Red Cross says to go when you are away, set to the same number day and night. None of it takes an afternoon.
One more thing worth doing before you drive down. Call your insurer and ask what your policy says about a dwelling left unoccupied, and for how long. That answer varies by carrier, and it is not something to discover after a claim.
If you own up here and spend part of the year somewhere warmer, it is worth having somebody who can put eyes on the place after a hard freeze. 480.688.8808
Jamie Wong · RE/MAX Fine Properties