Lyons, OR 97358 Frost Dates
Frost dates for Lyons, OR, ZIP 97358
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 11/04, about 190 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 Lyons, not a forecast for this year.
What to do before the first frost
Zone 8b around Lyons has about 10 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 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lyons compares
At roughly 190 frost-free days, Lyons places 21,223 of 40,283 ZIP codes in this dataset. Within OR, it ranks 278 of 463.
Learn more
the frost range explains how to read the range around Lyons's dates instead of trusting one, and local microclimates explains what one yard in Lyons can differ from the 97358 normal.