Index, WA 98224 Frost Dates
Index, WA: when does the frost end?
The last spring frost here typically falls around 04/14, about 229 days from today. Fall's first freeze usually shows up around 10/29, roughly 197 days after the last spring frost.
Index sits in USDA Zone 8a (10 to 15°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 9 weeks until Index's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Index's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Index against the rest of the dataset
Index's growing season runs about 197 days, ranking 18,845 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 337 of 700.
Learn more
Before leaning on 98224's figures: zone vs. frost date explains why Zone 8a and Index's frost date answer different questions, while the frost range explains how to read the range around Index's dates instead of trusting one.