Middlebury, IN 46540 Frost Dates
Middlebury, IN: when does the frost end?
The last spring frost here typically falls around 04/28, about 243 days from today. Fall's first freeze usually shows up around 10/19, roughly 171 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 Middlebury, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Middlebury's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/28 isn't a guarantee
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Middlebury against the rest of the dataset
At roughly 171 frost-free days, Middlebury places 28,639 of 40,283 ZIP codes in this dataset. Within IN, it ranks 761 of 927.
Learn more
Before leaning on 46540's figures: zone vs. frost date explains why Zone 6a and Middlebury's frost date answer different questions, while the frost range explains how to read the range around Middlebury's dates instead of trusting one.