Richland Center, WI 53581 Frost Dates
Richland Center, WI: when does the frost end?
Around 05/05 is the usual last spring frost, about 250 days away. Fall's first freeze usually shows up around 10/06, roughly 154 days after the last spring frost.
Richland Center 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 Richland Center'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
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Richland Center against the rest of the dataset
Richland Center's growing season runs about 154 days, ranking 34,269 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 475 of 860.
Learn more
Before leaning on 53581's figures: the frost range explains how to read the range around Richland Center's dates instead of trusting one, while local microclimates explains what one yard in Richland Center can differ from the 53581 normal.