Alma Center, WI 54611 Frost Dates
Frost dates for Alma Center, WI, ZIP 54611
Around 05/09 is the usual last spring frost, about 254 days away. The first fall frost typically arrives around 10/01, about 143 frost-free days later.
Alma Center sits in USDA Zone 4b (-25 to -20°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 4b around Alma Center has about 5 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 Alma Center's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alma Center compares
Alma Center's growing season runs about 143 days, ranking 36,597 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 696 of 860.
Learn more
local microclimates explains what one yard in Alma Center can differ from the 54611 normal, and zone vs. frost date explains why Zone 4b and Alma Center's frost date answer different questions.