Kittitas, WA 98934 Frost Dates
Frost dates for Kittitas, WA, ZIP 98934
Typically, the last spring freeze lands around 05/08, roughly 253 days out. The first fall frost typically arrives around 10/02, about 146 frost-free days later.
Kittitas sits in USDA Zone 6b (-5 to 0°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 6b around Kittitas has about 5 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 Kittitas's last frost
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kittitas compares
About 146 days separate Kittitas's last and first frost, putting it 36,058 of 40,283 ZIP codes nationally. Within WA, it ranks 608 of 700.
Learn more
the frost range explains how to read the range around Kittitas's dates instead of trusting one, and local microclimates explains what one yard in Kittitas can differ from the 98934 normal.