Warsaw, IN 46580 Frost Dates
46580, near Warsaw, IN: the frost window
Around 04/24 is the usual last spring frost, about 239 days away. Fall's first freeze usually shows up around 10/24, roughly 182 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 Warsaw, not a forecast for this year.
Stretching the season past the first frost
Warsaw'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.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 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.
Warsaw against the rest of the dataset
At roughly 182 frost-free days, Warsaw places 24,092 of 40,283 ZIP codes in this dataset. Within IN, it ranks 423 of 927.
Learn more
Two guides worth reading on 46580: zone vs. frost date, on why Zone 6a and Warsaw's frost date answer different questions, and the frost range, on how to read the range around Warsaw's dates instead of trusting one.