Greenwood, WI 54437 Frost Dates
Greenwood, WI: when does the frost end?
The last spring frost here typically falls around 05/13, about 258 days from today. Fall's first freeze usually shows up around 09/26, roughly 136 days after the last spring frost.
Greenwood 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.
Stretching the season past the first frost
With roughly 4 weeks until Greenwood's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/13 isn't a guarantee
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Greenwood against the rest of the dataset
Greenwood's growing season runs about 136 days, ranking 37,718 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 760 of 860.
Learn more
Before leaning on 54437's figures: local microclimates explains what one yard in Greenwood can differ from the 54437 normal, while zone vs. frost date explains why Zone 4b and Greenwood's frost date answer different questions.