Winston, OR 97496 Frost Dates
Frost dates for Winston, OR, ZIP 97496
Around 03/23 is the usual last spring frost, about 207 days away. The first fall frost typically arrives around 11/18, about 237 frost-free days later.
Zone 9a (20 to 25°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 Winston, not a forecast for this year.
What to do before the first frost
Zone 9a around Winston has about 12 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 Winston's last frost
03/23 is the middle of 30 years of NOAA records, not a promise. Plant by 02/25 and you're betting against frost in roughly 9 years out of 10. 04/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Winston compares
Winston's growing season runs about 237 days, ranking 9,102 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 129 of 463.
Learn more
zone vs. frost date explains why Zone 9a and Winston's frost date answer different questions, and the frost range explains how to read the range around Winston's dates instead of trusting one.