Ladysmith, WI 54848 Frost Dates
Frost dates for Ladysmith, WI, ZIP 54848
Around 05/27 is the usual last spring frost, about 272 days away. The first fall frost typically arrives around 09/22, about 117 frost-free days later.
Ladysmith 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
Zone 4a around Ladysmith has about 4 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.
How much risk comes with planting early here
05/27 is the middle of 30 years of NOAA records, not a promise. Plant by 05/14 and you're betting against frost in roughly 9 years out of 10. 06/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ladysmith compares
At roughly 117 frost-free days, Ladysmith places 39,247 of 40,283 ZIP codes in this dataset. Within WI, it ranks 851 of 860.
Learn more
the frost range explains how to read the range around Ladysmith's dates instead of trusting one, and local microclimates explains what one yard in Ladysmith can differ from the 54848 normal.