Harrisburg, SD 57032 Frost Dates
Harrisburg, SD: when does the frost end?
The last spring frost here typically falls around 05/02, about 247 days from today. Fall's first freeze usually shows up around 10/02, roughly 151 days after the last spring frost.
Harrisburg sits in USDA Zone 5a (-20 to -15°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 5 weeks until Harrisburg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Harrisburg against the rest of the dataset
At roughly 151 frost-free days, Harrisburg places 34,968 of 40,283 ZIP codes in this dataset. Within SD, it ranks 141 of 378.
Learn more
Before leaning on 57032's figures: local microclimates explains what one yard in Harrisburg can differ from the 57032 normal, while zone vs. frost date explains why Zone 5a and Harrisburg's frost date answer different questions.