Ice dam risk in Bainbridge Island, WA
Will your roof get ice dams in Bainbridge Island, WA?
0.1 dam days a winter
Almost never. An ordinary house in Bainbridge Island sees 0.1 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Bainbridge Island averages 3 inches of snow a year and about 2 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 Bainbridge Island?
- 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.
Bainbridge Island winter, month by month
| Month | Snow (in) | Days on ground | Dam days |
|---|---|---|---|
| January | 0.6 | 0.4 | 0.0 |
| February | 0.7 | 0.4 | 0.0 |
| March | 0.1 | 0.1 | 0.0 |
| November | 0.3 | 0.2 | 0.0 |
| December | 1.3 | 0.7 | 0.1 |
Bainbridge Island next to nearby towns
Bainbridge Island ranks 79 of 91 Washington cities here for ice-dam days, behind Spokane at 13.0 days.
- Seattle, WA 7 mi, 0.1 days
- Port Orchard, WA 9 mi, 0.1 days
- Poulsbo, WA 9 mi, 0.1 days
- Shoreline, WA 11 mi, 0.1 days
- Bremerton, WA 12 mi, 0.1 days
Where these numbers come from
NOAA 1991–2020 climate normals from Bremerton, 9.6 miles from Bainbridge Island. 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.