Ice dam risk in San Luis, AZ

Will your roof get ice dams in San Luis, AZ?

0.0 dam days a winter

Almost never. An ordinary house in San Luis sees 0.0 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.

San Luis averages 0 inches of snow a year and about 0 days with snow on the ground. Too little lies on the roof for long. The conditions that make a dam need all three at once: snow, cold at the eave and heat above it.

Do you need to do anything in San Luis?

Nothing for ice dams. If you are buying here and an inspector mentions water at the eaves, ask what they saw: it is far more likely a gutter, flashing or drip-edge problem than ice.

Snowy places are not always the worst: why snowfall misleads.

San Luis next to nearby towns

San Luis ranks 30 of 44 Arizona cities here for ice-dam days, behind Flagstaff at 16.2 days.

Somerton, AZ 8 mi, 0.0 days
Yuma, AZ 12 mi, 0.0 days
Calexico, CA 47 mi, 0.0 days
El Centro, CA 53 mi, 0.0 days
Imperial, CA 55 mi, 0.0 days

Where these numbers come from

NOAA 1991–2020 climate normals from Yuma Mcas, 12.9 miles from San Luis. A dam day is a day with snow on the roof and freezing at the eave while heat or sun melts the snow above it. This describes a normal winter, not this one.