Park Falls, WI 54538 Frost Dates
When can you plant in Park Falls, WI?
The last spring frost here typically falls around 05/23, about 268 days from today. The first fall frost typically arrives around 09/27, about 127 frost-free days later.
The USDA Plant Hardiness Zone Map puts Park Falls in Zone 4a (-30 to -25°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 4 weeks of growing season left in Park Falls before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/23 isn't a guarantee
05/23 is the middle of 30 years of NOAA records, not a promise. Plant by 05/07 and you're betting against frost in roughly 9 years out of 10. 06/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Park Falls compares
Park Falls's growing season runs about 127 days, ranking 38,627 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 807 of 860.
Learn more
local microclimates covers what one yard in Park Falls can differ from the 54538 normal. zone vs. frost date covers why Zone 4a and Park Falls's frost date answer different questions.