St. Paul, OR 97137 Frost Dates
When can you plant in St. Paul, OR?
Around 03/21 is the usual last spring frost, about 205 days away. The first fall frost typically arrives around 11/22, about 241 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 St. Paul, not a forecast for this year.
What to do before the first frost
About 12 weeks of growing season left in St. Paul before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/21 isn't a guarantee
03/21 is the middle of 30 years of NOAA records, not a promise. Plant by 02/23 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Paul compares
About 241 days separate St. Paul's last and first frost, putting it 8,615 of 40,283 ZIP codes nationally. Within OR, it ranks 123 of 463.
Learn more
zone vs. frost date covers why Zone 8b and St. Paul's frost date answer different questions. the frost range covers how to read the range around St. Paul's dates instead of trusting one.