Idanha, OR 97350 Frost Dates
When can you plant in Idanha, OR?
Around 03/09 is the usual last spring frost, about 193 days away. The first fall frost typically arrives around 12/03, about 270 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 Idanha, not a forecast for this year.
What to do before the first frost
About 14 weeks of growing season left in Idanha before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/09 isn't a guarantee
03/09 is the middle of 30 years of NOAA records, not a promise. Plant by 02/02 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Idanha compares
At roughly 270 frost-free days, Idanha places 5,635 of 40,283 ZIP codes in this dataset. Within OR, it ranks 41 of 463.
Learn more
the frost range covers how to read the range around Idanha's dates instead of trusting one. local microclimates covers what one yard in Idanha can differ from the 97350 normal.