Deerfield, WI 53531 Frost Dates
Deerfield, WI: when does the frost end?
The last spring frost here typically falls around 04/29, about 244 days from today. Fall's first freeze usually shows up around 10/14, roughly 167 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Deerfield, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Deerfield's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Deerfield against the rest of the dataset
About 167 days separate Deerfield's last and first frost, putting it 30,004 of 40,283 ZIP codes nationally. Within WI, it ranks 164 of 860.
Learn more
Before leaning on 53531's figures: the frost range explains how to read the range around Deerfield's dates instead of trusting one, while local microclimates explains what one yard in Deerfield can differ from the 53531 normal.