Ephraim, WI 54212 Frost Dates
When can you plant in Ephraim, WI?
Around 05/14 is the usual last spring frost, about 259 days away. The first fall frost typically arrives around 10/18, about 155 frost-free days later.
Ephraim sits in USDA Zone 5b (-15 to -10°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 7 weeks of growing season left in Ephraim 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
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ephraim compares
About 155 days separate Ephraim's last and first frost, putting it 34,115 of 40,283 ZIP codes nationally. Within WI, it ranks 450 of 860.
Learn more
local microclimates covers what one yard in Ephraim can differ from the 54212 normal. zone vs. frost date covers why Zone 5b and Ephraim's frost date answer different questions.