Republic, WA 99118 Frost Dates
Frost dates for Republic, WA, ZIP 99118
The last spring frost here typically falls around 05/30, about 275 days from today. The first fall frost typically arrives around 09/10, about 102 frost-free days later.
Republic sits in USDA Zone 6a (-10 to -5°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 6a around Republic has about 2 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 05/30 isn't a guarantee
05/30 is the middle of 30 years of NOAA records, not a promise. Plant by 05/11 and you're betting against frost in roughly 9 years out of 10. 06/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Republic compares
At roughly 102 frost-free days, Republic places 39,663 of 40,283 ZIP codes in this dataset. Within WA, it ranks 674 of 700.
Learn more
local microclimates explains what one yard in Republic can differ from the 99118 normal, and zone vs. frost date explains why Zone 6a and Republic's frost date answer different questions.