Marathon, NY 13863 Frost Dates
Frost dates for Marathon, NY, ZIP 13863
Typically, the last spring freeze lands around 05/04, roughly 249 days out. The first fall frost typically arrives around 10/16, about 163 frost-free days later.
Zone 5b (-15 to -10°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 Marathon, not a forecast for this year.
What to do before the first frost
Zone 5b around Marathon 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 Marathon's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marathon compares
About 163 days separate Marathon's last and first frost, putting it 31,475 of 40,283 ZIP codes nationally. Within NY, it ranks 983 of 1,951.
Learn more
zone vs. frost date explains why Zone 5b and Marathon's frost date answer different questions, and the frost range explains how to read the range around Marathon's dates instead of trusting one.