Tenino, WA 98589 Frost Dates
Frost dates for Tenino, WA, ZIP 98589
Around 04/29 is the usual last spring frost, about 244 days away. The first fall frost typically arrives around 10/14, about 169 frost-free days later.
Tenino sits in USDA Zone 8b (15 to 20°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 8b around Tenino 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.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tenino compares
About 169 days separate Tenino's last and first frost, putting it 29,474 of 40,283 ZIP codes nationally. Within WA, it ranks 529 of 700.
Learn more
zone vs. frost date explains why Zone 8b and Tenino's frost date answer different questions, and the frost range explains how to read the range around Tenino's dates instead of trusting one.