Medford, WI 54451 Frost Dates
When can you plant in Medford, WI?
Typically, the last spring freeze lands around 05/11, roughly 256 days out. The first fall frost typically arrives around 10/01, about 141 frost-free days later.
The USDA Plant Hardiness Zone Map puts Medford in Zone 4a (-30 to -25°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 Medford before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/11 isn't a guarantee
05/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Medford compares
At roughly 141 frost-free days, Medford places 36,904 of 40,283 ZIP codes in this dataset. Within WI, it ranks 703 of 860.
Learn more
the frost range covers how to read the range around Medford's dates instead of trusting one. local microclimates covers what one yard in Medford can differ from the 54451 normal.