Chaseburg, WI 54621 Frost Dates
Frost dates for Chaseburg, WI, ZIP 54621
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/17, about 178 frost-free days later.
Chaseburg sits in USDA Zone 5a (-20 to -15°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 5a around Chaseburg has about 7 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 Chaseburg's last frost
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Chaseburg compares
Chaseburg's growing season runs about 178 days, ranking 25,921 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 58 of 860.
Learn more
the frost range explains how to read the range around Chaseburg's dates instead of trusting one, and local microclimates explains what one yard in Chaseburg can differ from the 54621 normal.