Ice dam risk in Arroyo Grande, CA

Ice dams in Arroyo Grande, CA: how often

0.0 dam days a winter

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

Arroyo Grande 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 Arroyo Grande?

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.

Arroyo Grande next to nearby towns

Arroyo Grande ranks 314 of 376 California cities here for ice-dam days, behind Truckee at 36.3 days.

Grover Beach, CA 2 mi, 0.0 days
San Luis Obispo, CA 11 mi, 0.0 days
Santa Maria, CA 15 mi, 0.0 days
Morro Bay, CA 23 mi, 0.0 days
Atascadero, CA 26 mi, 0.0 days

Where these numbers come from

NOAA 1991–2020 climate normals from Pismo Beach, 6.1 miles from Arroyo Grande. 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.