College Place, WA 99360 Frost Dates
When can you plant in College Place, WA?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/01, about 151 frost-free days later.
College Place sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 5 weeks of growing season left in College Place before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around College Place's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How College Place compares
About 151 days separate College Place's last and first frost, putting it 34,970 of 40,283 ZIP codes nationally. Within WA, it ranks 596 of 700.
Learn more
the frost range covers how to read the range around College Place's dates instead of trusting one. local microclimates covers what one yard in College Place can differ from the 99360 normal.