Jacksonville, OR 97530 Frost Dates
Frost dates for Jacksonville, OR, ZIP 97530
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/13, about 160 frost-free days later.
Jacksonville sits in USDA Zone 8a (10 to 15°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
Zone 8a around Jacksonville has about 7 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.
Why 05/04 isn't a guarantee
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jacksonville compares
Jacksonville's growing season runs about 160 days, ranking 32,327 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 336 of 463.
Learn more
the frost range explains how to read the range around Jacksonville's dates instead of trusting one, and local microclimates explains what one yard in Jacksonville can differ from the 97530 normal.