Sauk City, WI 53583 Frost Dates
When can you plant in Sauk City, WI?
Typically, the last spring freeze lands around 05/04, roughly 249 days out. The first fall frost typically arrives around 10/06, about 155 frost-free days later.
Sauk City 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.
What to do before the first frost
About 6 weeks of growing season left in Sauk City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 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 Sauk City compares
Sauk City's growing season runs about 155 days, ranking 33,973 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 438 of 860.
Learn more
the frost range covers how to read the range around Sauk City's dates instead of trusting one. local microclimates covers what one yard in Sauk City can differ from the 53583 normal.