Richfield, WI 53076 Frost Dates
Richfield, WI: when does the frost end?
Typically, the last spring freeze lands around 04/30, roughly 245 days out. Fall's first freeze usually shows up around 10/16, 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 Richfield, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Richfield's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Richfield against the rest of the dataset
At roughly 167 frost-free days, Richfield places 29,910 of 40,283 ZIP codes in this dataset. Within WI, it ranks 156 of 860.
Learn more
Before leaning on 53076's figures: local microclimates explains what one yard in Richfield can differ from the 53076 normal, while zone vs. frost date explains why Zone 5b and Richfield's frost date answer different questions.