Ice dam risk in Coos Bay, OR
Ice dams in Coos Bay, OR: how often
0.0 dam days a winter
Almost never. An ordinary house in Coos Bay sees 0.0 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Coos Bay 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 Coos Bay?
- 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.
Coos Bay winter, month by month
| Month | Snow (in) | Days on ground | Dam days |
|---|---|---|---|
| December | 0.2 | 0.0 | 0.0 |
Coos Bay next to nearby towns
Coos Bay ranks 53 of 57 Oregon cities here for ice-dam days, behind Klamath Falls at 9.8 days.
- North Bend, OR 2 mi, 0.0 days
- Roseburg, OR 46 mi, 0.0 days
- Cottage Grove, OR 65 mi, 0.2 days
- Eugene, OR 73 mi, 0.2 days
- Springfield, OR 78 mi, 0.0 days
Where these numbers come from
NOAA 1991–2020 climate normals from N Bend SW Oregon Regional Airport, 2.3 miles from Coos Bay. 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.