Brookston, IN 47923 Frost Dates
Brookston, IN: when does the frost end?
Around 04/25 is the usual last spring frost, about 240 days away. Fall's first freeze usually shows up around 10/17, roughly 173 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Brookston in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Brookston'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
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Brookston against the rest of the dataset
Brookston's growing season runs about 173 days, ranking 27,956 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 721 of 927.
Learn more
Before leaning on 47923's figures: zone vs. frost date explains why Zone 6a and Brookston's frost date answer different questions, while the frost range explains how to read the range around Brookston's dates instead of trusting one.