Ice dam risk in Hollister, CA
Ice dams in Hollister, CA: how often
0.0 dam days a winter
Almost never. An ordinary house in Hollister sees 0.0 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Hollister 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 Hollister?
- 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.
Hollister winter, month by month
| Month | Snow (in) | Days on ground | Dam days |
|---|---|---|---|
| December | 0.1 | 0.0 | 0.0 |
Hollister next to nearby towns
Hollister ranks 201 of 376 California cities here for ice-dam days, behind Truckee at 36.3 days.
- Gilroy, CA 15 mi, 0.0 days
- Salinas, CA 17 mi, 0.0 days
- Watsonville, CA 21 mi, 0.0 days
- Morgan Hill, CA 23 mi, 0.0 days
- Marina, CA 25 mi, 0.0 days
Where these numbers come from
NOAA 1991–2020 climate normals from Hollister 2, 1.3 miles from Hollister. 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.