Derby Line, VT 05907 Frost Dates
Frost dates for Derby Line, VT, ZIP 05907
Around 05/25 is the usual last spring frost, about 270 days away. The first fall frost typically arrives around 09/22, about 120 frost-free days later.
Derby Line sits in USDA Zone 4a (-30 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.
What to do before the first frost
Zone 4a around Derby Line has about 4 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
05/25 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Derby Line compares
Derby Line's growing season runs about 120 days, ranking 39,091 of 40,283 US ZIP codes measured here, longest to shortest. Within VT, it ranks 310 of 330.
Learn more
local microclimates explains what one yard in Derby Line can differ from the 05907 normal, and zone vs. frost date explains why Zone 4a and Derby Line's frost date answer different questions.