South Burlington, VT 05461 Frost Dates
Frost dates for South Burlington, VT, ZIP 05461
Typically, the last spring freeze lands around 04/29, roughly 244 days out. 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 South Burlington, not a forecast for this year.
What to do before the first frost
Zone 5a around South Burlington 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.
The actual range around South Burlington's last frost
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 South Burlington compares
About 169 days separate South Burlington's last and first frost, putting it 29,340 of 40,283 ZIP codes nationally. Within VT, it ranks 7 of 330.
Learn more
zone vs. frost date explains why Zone 5a and South Burlington's frost date answer different questions, and the frost range explains how to read the range around South Burlington's dates instead of trusting one.