Columbia City, OR 97018 Frost Dates
When can you plant in Columbia City, OR?
Typically, the last spring freeze lands around 04/18, roughly 233 days out. The first fall frost typically arrives around 11/07, about 201 frost-free days later.
Columbia City sits in USDA Zone 8b (15 to 20°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 10 weeks of growing season left in Columbia City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Columbia City's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 03/20 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Columbia City compares
At roughly 201 frost-free days, Columbia City places 17,537 of 40,283 ZIP codes in this dataset. Within OR, it ranks 231 of 463.
Learn more
local microclimates covers what one yard in Columbia City can differ from the 97018 normal. zone vs. frost date covers why Zone 8b and Columbia City's frost date answer different questions.