Grand Rivers, KY 42045 Frost Dates
42045, near Grand Rivers, KY: the frost window
Around 03/27 is the usual last spring frost, about 211 days away. Fall's first freeze usually shows up around 11/08, roughly 225 days after the last spring frost.
Zone 7a (0 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 Grand Rivers, not a forecast for this year.
Stretching the season past the first frost
Grand Rivers's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
03/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Grand Rivers against the rest of the dataset
About 225 days separate Grand Rivers's last and first frost, putting it 11,474 of 40,283 ZIP codes nationally. Within KY, it ranks 8 of 909.
Learn more
Two guides worth reading on 42045: local microclimates, on what one yard in Grand Rivers can differ from the 42045 normal, and zone vs. frost date, on why Zone 7a and Grand Rivers's frost date answer different questions.