Langley, WA 98340 Frost Dates
Frost dates for Langley, WA, ZIP 98340
The last spring frost here typically falls around 03/09, about 193 days from today. The first fall frost typically arrives around 11/17, about 250 frost-free days later.
Langley sits in USDA Zone 8b (15 to 20°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.
What to do before the first frost
Zone 8b around Langley has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
03/09 is the middle of 30 years of NOAA records, not a promise. Plant by 02/15 and you're betting against frost in roughly 9 years out of 10. 03/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Langley compares
About 250 days separate Langley's last and first frost, putting it 7,559 of 40,283 ZIP codes nationally. Within WA, it ranks 130 of 700.
Learn more
zone vs. frost date explains why Zone 8b and Langley's frost date answer different questions, and the frost range explains how to read the range around Langley's dates instead of trusting one.