Ice dam risk in Walnut, CA
Will your roof get ice dams in Walnut, CA?
0.0 dam days a winter
Almost never. An ordinary house in Walnut sees 0.0 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Walnut 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 Walnut?
- 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.
Walnut next to nearby towns
Walnut ranks 260 of 376 California cities here for ice-dam days, behind Truckee at 36.3 days.
- Diamond Bar, CA 3 mi, 0.0 days
- West Covina, CA 3 mi, 0.0 days
- Covina, CA 4 mi, 0.0 days
- San Dimas, CA 6 mi, 0.0 days
- Pomona, CA 6 mi, 0.0 days
Where these numbers come from
NOAA 1991–2020 climate normals from Pomona/Fairplex, 6.0 miles from Walnut. 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.