Amherst, WI 54406 Frost Dates
Amherst, WI: when does the frost end?
The last spring frost here typically falls around 05/08, about 253 days from today. Fall's first freeze usually shows up around 10/06, roughly 151 days after the last spring frost.
Amherst 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 6 weeks until Amherst's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Amherst's last frost
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Amherst against the rest of the dataset
Amherst's growing season runs about 151 days, ranking 35,087 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 546 of 860.
Learn more
Before leaning on 54406's figures: local microclimates explains what one yard in Amherst can differ from the 54406 normal, while zone vs. frost date explains why Zone 5a and Amherst's frost date answer different questions.