Rockport, IN 42355 Frost Dates
Frost dates for Rockport, IN, ZIP 42355
Typically, the last spring freeze lands around 04/02, roughly 217 days out. The first fall frost typically arrives around 11/07, about 218 frost-free days later.
The USDA Plant Hardiness Zone Map puts Rockport in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7a around Rockport has about 10 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 04/02 isn't a guarantee
04/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/16 and you're betting against frost in roughly 9 years out of 10. 04/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rockport compares
Rockport's growing season runs about 218 days, ranking 13,283 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 22 of 927.
Learn more
zone vs. frost date explains why Zone 7a and Rockport's frost date answer different questions, and the frost range explains how to read the range around Rockport's dates instead of trusting one.