Winooski, VT 05404 Frost Dates
Frost dates for Winooski, VT, ZIP 05404
The last spring frost here typically falls around 04/29, about 244 days from today. The first fall frost typically arrives around 10/15, about 169 frost-free days later.
Zone 5a (-20 to -15°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 Winooski, not a forecast for this year.
What to do before the first frost
Zone 5a around Winooski has about 7 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.
Why 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Winooski compares
At roughly 169 frost-free days, Winooski places 29,392 of 40,283 ZIP codes in this dataset. Within VT, it ranks 19 of 330.
Learn more
local microclimates explains what one yard in Winooski can differ from the 05404 normal, and zone vs. frost date explains why Zone 5a and Winooski's frost date answer different questions.