Ice dam risk in Santa Rosa, CA

How often ice dams form in Santa Rosa

0.0 dam days a winter

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

Santa Rosa 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 Santa Rosa?

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.

Santa Rosa next to nearby towns

Santa Rosa ranks 32 of 376 California cities here for ice-dam days, behind Truckee at 36.3 days.

Rohnert Park, CA 7 mi, 0.0 days
Windsor, CA 9 mi, 0.0 days
Petaluma, CA 15 mi, 0.0 days
Healdsburg, CA 15 mi, 0.0 days
Sonoma, CA 17 mi, 0.0 days

Where these numbers come from

NOAA 1991–2020 climate normals from Santa Rosa, 0.8 miles from Santa Rosa. 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.