Gresham, WI 54128 Frost Dates
Gresham, WI: when does the frost end?
Typically, the last spring freeze lands around 05/09, roughly 254 days out. Fall's first freeze usually shows up around 10/02, roughly 144 days after the last spring frost.
Gresham 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.
Stretching the season past the first frost
With roughly 5 weeks until Gresham's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/24 and only about 1 year in 10 sees frost after that.
Gresham against the rest of the dataset
At roughly 144 frost-free days, Gresham places 36,436 of 40,283 ZIP codes in this dataset. Within WI, it ranks 678 of 860.
Learn more
Before leaning on 54128's figures: local microclimates explains what one yard in Gresham can differ from the 54128 normal, while zone vs. frost date explains why Zone 5a and Gresham's frost date answer different questions.