Princeton, IN 47670 Frost Dates
47670, near Princeton, IN: the frost window
Typically, the last spring freeze lands around 04/13, roughly 228 days out. Fall's first freeze usually shows up around 10/25, roughly 194 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Princeton in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Princeton's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Princeton's last frost
04/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Princeton against the rest of the dataset
Princeton's growing season runs about 194 days, ranking 19,466 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 188 of 927.
Learn more
Two guides worth reading on 47670: local microclimates, on what one yard in Princeton can differ from the 47670 normal, and zone vs. frost date, on why Zone 6b and Princeton's frost date answer different questions.