Worthing, SD 57077 Frost Dates
Worthing, 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.
Worthing 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 Worthing's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Worthing's last frost
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.
Worthing against the rest of the dataset
Worthing's growing season runs about 151 days, ranking 35,101 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 149 of 378.
Learn more
Before leaning on 57077's figures: local microclimates explains what one yard in Worthing can differ from the 57077 normal, while zone vs. frost date explains why Zone 5a and Worthing's frost date answer different questions.