Westport, IN 47283 Frost Dates
47283, near Westport, IN: the frost window
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/21, roughly 180 days after the last spring frost.
Westport sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Westport'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 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Westport against the rest of the dataset
At roughly 180 frost-free days, Westport places 24,920 of 40,283 ZIP codes in this dataset. Within IN, it ranks 498 of 927.
Learn more
Two guides worth reading on 47283: local microclimates, on what one yard in Westport can differ from the 47283 normal, and zone vs. frost date, on why Zone 6b and Westport's frost date answer different questions.