Tillamook, OR 97108 Frost Dates
Frost dates for Tillamook, OR, ZIP 97108
Typically, the last spring freeze lands around 03/17, roughly 201 days out. The first fall frost typically arrives around 11/22, about 251 frost-free days later.
The USDA Plant Hardiness Zone Map puts Tillamook in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8b around Tillamook has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 03/17 isn't a guarantee
03/17 is the middle of 30 years of NOAA records, not a promise. Plant by 02/09 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tillamook compares
At roughly 251 frost-free days, Tillamook places 7,323 of 40,283 ZIP codes in this dataset. Within OR, it ranks 56 of 463.
Learn more
zone vs. frost date explains why Zone 8b and Tillamook's frost date answer different questions, and the frost range explains how to read the range around Tillamook's dates instead of trusting one.