Aurora, IN 47001 Frost Dates
47001, near Aurora, IN: the frost window
Typically, the last spring freeze lands around 04/30, roughly 245 days out. Fall's first freeze usually shows up around 10/16, roughly 168 days after the last spring frost.
Zone 6b (-5 to 0°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 Aurora, not a forecast for this year.
Stretching the season past the first frost
Aurora's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Aurora against the rest of the dataset
Aurora's growing season runs about 168 days, ranking 29,710 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 829 of 927.
Learn more
Two guides worth reading on 47001: the frost range, on how to read the range around Aurora's dates instead of trusting one, and local microclimates, on what one yard in Aurora can differ from the 47001 normal.