Monroe City, IN 47557 Frost Dates
47557, near Monroe City, IN: the frost window
Around 04/10 is the usual last spring frost, about 225 days away. Fall's first freeze usually shows up around 10/25, roughly 197 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 Monroe City, not a forecast for this year.
Stretching the season past the first frost
Monroe City'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 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Monroe City against the rest of the dataset
About 197 days separate Monroe City's last and first frost, putting it 18,792 of 40,283 ZIP codes nationally. Within IN, it ranks 148 of 927.
Learn more
Two guides worth reading on 47557: local microclimates, on what one yard in Monroe City can differ from the 47557 normal, and zone vs. frost date, on why Zone 6b and Monroe City's frost date answer different questions.