Westville, IN 46391 Frost Dates
46391, near Westville, IN: the frost window
The last spring frost here typically falls around 04/22, about 237 days from today. Fall's first freeze usually shows up around 10/25, roughly 185 days after the last spring frost.
Zone 6a (-10 to -5°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 Westville, not a forecast for this year.
Stretching the season past the first frost
Westville'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 Westville's last frost
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 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.
Westville against the rest of the dataset
At roughly 185 frost-free days, Westville places 23,136 of 40,283 ZIP codes in this dataset. Within IN, it ranks 373 of 927.
Learn more
Two guides worth reading on 46391: local microclimates, on what one yard in Westville can differ from the 46391 normal, and zone vs. frost date, on why Zone 6a and Westville's frost date answer different questions.