Ice dam risk in Vallejo, CA
Ice dams in Vallejo, CA: how often
0.0 dam days a winter
Almost never. An ordinary house in Vallejo sees 0.0 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Vallejo 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 Vallejo?
- 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.
Vallejo next to nearby towns
Vallejo ranks 56 of 376 California cities here for ice-dam days, behind Truckee at 36.3 days.
- American Canyon, CA 5 mi, 0.0 days
- Hercules, CA 6 mi, 0.0 days
- Benicia, CA 6 mi, 0.0 days
- Pinole, CA 8 mi, 0.0 days
- San Pablo, CA 11 mi, 0.0 days
Where these numbers come from
NOAA 1991–2020 climate normals from Martinez Wtp, 10.3 miles from Vallejo. 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.