Turtle Lake, WI 54889 Frost Dates
When can you plant in Turtle Lake, WI?
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/04, about 152 frost-free days later.
The USDA Plant Hardiness Zone Map puts Turtle Lake in Zone 4b (-25 to -20°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
About 5 weeks of growing season left in Turtle Lake before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Turtle Lake'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 Turtle Lake compares
About 152 days separate Turtle Lake's last and first frost, putting it 34,810 of 40,283 ZIP codes nationally. Within WI, it ranks 523 of 860.
Learn more
local microclimates covers what one yard in Turtle Lake can differ from the 54889 normal. zone vs. frost date covers why Zone 4b and Turtle Lake's frost date answer different questions.