Kirkland, WA 98033 Frost Dates
98033, near Kirkland, WA: the frost window
The last spring frost here typically falls around 03/08, about 192 days from today. Fall's first freeze usually shows up around 11/23, roughly 259 days after the last spring frost.
Kirkland 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
Kirkland'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 Kirkland'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.
Kirkland against the rest of the dataset
Kirkland's growing season runs about 259 days, ranking 6,539 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 32 of 700.
Learn more
Two guides worth reading on 98033: zone vs. frost date, on why Zone 9a and Kirkland's frost date answer different questions, and the frost range, on how to read the range around Kirkland's dates instead of trusting one.