Milton-Freewater, OR 97862 Frost Dates
Frost dates for Milton-Freewater, OR, ZIP 97862
Around 03/25 is the usual last spring frost, about 209 days away. The first fall frost typically arrives around 10/29, about 218 frost-free days later.
Zone 7a (0 to 5°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 Milton-Freewater, not a forecast for this year.
What to do before the first frost
Zone 7a around Milton-Freewater has about 9 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 03/25 isn't a guarantee
03/25 is the middle of 30 years of NOAA records, not a promise. Plant by 03/06 and you're betting against frost in roughly 9 years out of 10. 04/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Milton-Freewater compares
About 218 days separate Milton-Freewater's last and first frost, putting it 13,256 of 40,283 ZIP codes nationally. Within OR, it ranks 179 of 463.
Learn more
local microclimates explains what one yard in Milton-Freewater can differ from the 97862 normal, and zone vs. frost date explains why Zone 7a and Milton-Freewater's frost date answer different questions.