Arlington, OR 97812 Frost Dates
Frost dates for Arlington, OR, ZIP 97812
Around 04/06 is the usual last spring frost, about 221 days away. The first fall frost typically arrives around 10/21, about 196 frost-free days later.
Zone 7b (5 to 10°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 Arlington, not a forecast for this year.
What to do before the first frost
Zone 7b around Arlington has about 8 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 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/22 and you're betting against frost in roughly 9 years out of 10. 04/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Arlington compares
About 196 days separate Arlington's last and first frost, putting it 19,056 of 40,283 ZIP codes nationally. Within OR, it ranks 253 of 463.
Learn more
zone vs. frost date explains why Zone 7b and Arlington's frost date answer different questions, and the frost range explains how to read the range around Arlington's dates instead of trusting one.