Mount Sterling, WI 54654 Frost Dates
Frost dates for Mount Sterling, WI, ZIP 54654
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 10/07, about 156 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mount Sterling in Zone 5a (-20 to -15°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
Zone 5a around Mount Sterling has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Mount Sterling's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 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 Mount Sterling compares
At roughly 156 frost-free days, Mount Sterling places 33,859 of 40,283 ZIP codes in this dataset. Within WI, it ranks 431 of 860.
Learn more
the frost range explains how to read the range around Mount Sterling's dates instead of trusting one, and local microclimates explains what one yard in Mount Sterling can differ from the 54654 normal.