Marshall, IN 47859 Frost Dates
Frost dates for Marshall, IN, ZIP 47859
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/12, about 164 frost-free days later.
Marshall sits in USDA Zone 6a (-10 to -5°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 6a around Marshall has about 6 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marshall compares
Marshall's growing season runs about 164 days, ranking 31,187 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 894 of 927.
Learn more
zone vs. frost date explains why Zone 6a and Marshall's frost date answer different questions, and the frost range explains how to read the range around Marshall's dates instead of trusting one.