Medina, WA 98039 Frost Dates
98039, near Medina, WA: the frost window
Around 03/08 is the usual last spring frost, about 192 days away. Fall's first freeze usually shows up around 11/23, roughly 259 days after the last spring frost.
Medina sits in USDA Zone 9a (20 to 25°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
Medina's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
03/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/29 and only about 1 year in 10 sees frost after that.
Medina against the rest of the dataset
Medina's growing season runs about 259 days, ranking 6,591 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 48 of 700.
Learn more
Two guides worth reading on 98039: the frost range, on how to read the range around Medina's dates instead of trusting one, and local microclimates, on what one yard in Medina can differ from the 98039 normal.