Mellen, WI 54565 Frost Dates
When can you plant in Mellen, WI?
Typically, the last spring freeze lands around 05/26, roughly 271 days out. The first fall frost typically arrives around 09/27, about 125 frost-free days later.
Mellen sits in USDA Zone 4a (-30 to -25°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 4 weeks of growing season left in Mellen 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
05/26 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mellen compares
At roughly 125 frost-free days, Mellen places 38,785 of 40,283 ZIP codes in this dataset. Within WI, it ranks 817 of 860.
Learn more
local microclimates covers what one yard in Mellen can differ from the 54565 normal. zone vs. frost date covers why Zone 4a and Mellen's frost date answer different questions.