Monticello, WI 53570 Frost Dates
When can you plant in Monticello, WI?
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/14, about 170 frost-free days later.
The USDA Plant Hardiness Zone Map puts Monticello 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
About 7 weeks of growing season left in Monticello before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Monticello's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Monticello compares
About 170 days separate Monticello's last and first frost, putting it 29,101 of 40,283 ZIP codes nationally. Within WI, it ranks 123 of 860.
Learn more
the frost range covers how to read the range around Monticello's dates instead of trusting one. local microclimates covers what one yard in Monticello can differ from the 53570 normal.