Carmel, IN 46033 Frost Dates
46033, near Carmel, IN: the frost window
Around 04/18 is the usual last spring frost, about 233 days away. Fall's first freeze usually shows up around 10/26, roughly 190 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Carmel in Zone 6a (-10 to -5°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
Carmel'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.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Carmel against the rest of the dataset
Carmel's growing season runs about 190 days, ranking 20,973 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 249 of 927.
Learn more
Two guides worth reading on 46033: the frost range, on how to read the range around Carmel's dates instead of trusting one, and local microclimates, on what one yard in Carmel can differ from the 46033 normal.