Halfway, OR 97834 Frost Dates
Frost dates for Halfway, OR, ZIP 97834
Typically, the last spring freeze lands around 05/10, roughly 255 days out. The first fall frost typically arrives around 10/01, about 141 frost-free days later.
Zone 6b (-5 to 0°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 Halfway, not a forecast for this year.
What to do before the first frost
Zone 6b around Halfway has about 5 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
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Halfway compares
At roughly 141 frost-free days, Halfway places 36,980 of 40,283 ZIP codes in this dataset. Within OR, it ranks 374 of 463.
Learn more
local microclimates explains what one yard in Halfway can differ from the 97834 normal, and zone vs. frost date explains why Zone 6b and Halfway's frost date answer different questions.