Lyman, WA 98263 Frost Dates
Lyman, WA: when does the frost end?
Around 03/27 is the usual last spring frost, about 211 days away. Fall's first freeze usually shows up around 11/06, roughly 224 days after the last spring frost.
Lyman 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.
Stretching the season past the first frost
With roughly 10 weeks until Lyman's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Lyman against the rest of the dataset
About 224 days separate Lyman's last and first frost, putting it 11,946 of 40,283 ZIP codes nationally. Within WA, it ranks 220 of 700.
Learn more
Before leaning on 98263's figures: local microclimates explains what one yard in Lyman can differ from the 98263 normal, while zone vs. frost date explains why Zone 8b and Lyman's frost date answer different questions.