Twisp, WA 98856 Frost Dates
Twisp, WA: when does the frost end?
Around 05/15 is the usual last spring frost, about 260 days away. Fall's first freeze usually shows up around 09/22, roughly 127 days after the last spring frost.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Twisp, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Twisp'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
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Twisp against the rest of the dataset
At roughly 127 frost-free days, Twisp places 38,642 of 40,283 ZIP codes in this dataset. Within WA, it ranks 643 of 700.
Learn more
Before leaning on 98856's figures: the frost range explains how to read the range around Twisp's dates instead of trusting one, while local microclimates explains what one yard in Twisp can differ from the 98856 normal.