Ramona, SD 57054 Frost Dates
When can you plant in Ramona, SD?
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 09/30, about 148 frost-free days later.
Ramona sits in USDA Zone 4b (-25 to -20°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.
What to do before the first frost
About 5 weeks of growing season left in Ramona before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Ramona's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ramona compares
Ramona's growing season runs about 148 days, ranking 35,809 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 206 of 378.
Learn more
the frost range covers how to read the range around Ramona's dates instead of trusting one. local microclimates covers what one yard in Ramona can differ from the 57054 normal.