Astoria, OR 98643 Frost Dates
Frost dates for Astoria, OR, ZIP 98643
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/22, about 178 frost-free days later.
The USDA Plant Hardiness Zone Map puts Astoria in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8b around Astoria has about 8 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.
The actual range around Astoria's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 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 Astoria compares
About 178 days separate Astoria's last and first frost, putting it 25,656 of 40,283 ZIP codes nationally. Within OR, it ranks 301 of 463.
Learn more
zone vs. frost date explains why Zone 8b and Astoria's frost date answer different questions, and the frost range explains how to read the range around Astoria's dates instead of trusting one.