Napoleon, IN 47034 Frost Dates
Napoleon, IN: when does the frost end?
Typically, the last spring freeze lands around 04/15, roughly 230 days out. Fall's first freeze usually shows up around 10/26, roughly 194 days after the last spring frost.
Napoleon 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
With roughly 8 weeks until Napoleon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Napoleon against the rest of the dataset
About 194 days separate Napoleon's last and first frost, putting it 19,619 of 40,283 ZIP codes nationally. Within IN, it ranks 200 of 927.
Learn more
Before leaning on 47034's figures: local microclimates explains what one yard in Napoleon can differ from the 47034 normal, while zone vs. frost date explains why Zone 6b and Napoleon's frost date answer different questions.