Westfir, OR 97492 Frost Dates
Frost dates for Westfir, OR, ZIP 97492
Around 04/03 is the usual last spring frost, about 218 days away. The first fall frost typically arrives around 11/11, about 220 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 Westfir, not a forecast for this year.
What to do before the first frost
Zone 8b around Westfir has about 11 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.
The actual range around Westfir's last frost
04/03 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Westfir compares
Westfir's growing season runs about 220 days, ranking 12,901 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 178 of 463.
Learn more
the frost range explains how to read the range around Westfir's dates instead of trusting one, and local microclimates explains what one yard in Westfir can differ from the 97492 normal.