Rhinelander, WI 54543 Frost Dates
Rhinelander, WI: when does the frost end?
Typically, the last spring freeze lands around 05/26, roughly 271 days out. Fall's first freeze usually shows up around 09/23, roughly 120 days after the last spring frost.
Rhinelander sits in USDA Zone 4b (-25 to -20°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 4 weeks until Rhinelander's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Rhinelander's last frost
05/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/08 and only about 1 year in 10 sees frost after that.
Rhinelander against the rest of the dataset
About 120 days separate Rhinelander's last and first frost, putting it 39,074 of 40,283 ZIP codes nationally. Within WI, it ranks 846 of 860.
Learn more
Before leaning on 54543's figures: local microclimates explains what one yard in Rhinelander can differ from the 54543 normal, while zone vs. frost date explains why Zone 4b and Rhinelander's frost date answer different questions.