Geddes, SD 57342 Frost Dates
Frost dates for Geddes, SD, ZIP 57342
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/13, about 165 frost-free days later.
The USDA Plant Hardiness Zone Map puts Geddes in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5a around Geddes has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Geddes compares
Geddes's growing season runs about 165 days, ranking 30,765 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 9 of 378.
Learn more
zone vs. frost date explains why Zone 5a and Geddes's frost date answer different questions, and the frost range explains how to read the range around Geddes's dates instead of trusting one.