Brownsville, OR 97336 Frost Dates
Frost dates for Brownsville, OR, ZIP 97336
Typically, the last spring freeze lands around 03/14, roughly 198 days out. The first fall frost typically arrives around 11/18, about 248 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Brownsville, not a forecast for this year.
What to do before the first frost
Zone 8b around Brownsville 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.
How much risk comes with planting early here
03/14 is the middle of 30 years of NOAA records, not a promise. Plant by 02/18 and you're betting against frost in roughly 9 years out of 10. 04/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brownsville compares
At roughly 248 frost-free days, Brownsville places 7,714 of 40,283 ZIP codes in this dataset. Within OR, it ranks 81 of 463.
Learn more
zone vs. frost date explains why Zone 8b and Brownsville's frost date answer different questions, and the frost range explains how to read the range around Brownsville's dates instead of trusting one.