Medina, WA 98112 Frost Dates
98112, near Medina, WA: the frost window
Typically, the last spring freeze lands around 03/08, roughly 192 days out. Fall's first freeze usually shows up around 11/23, roughly 259 days after the last spring frost.
Zone 9a (20 to 25°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 Medina, not a forecast for this year.
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.
The actual range around Medina's last frost
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
About 259 days separate Medina's last and first frost, putting it 6,592 of 40,283 ZIP codes nationally. Within WA, it ranks 49 of 700.
Learn more
Two guides worth reading on 98112: local microclimates, on what one yard in Medina can differ from the 98112 normal, and zone vs. frost date, on why Zone 9a and Medina's frost date answer different questions.