Proctor, MN 55810 Frost Dates
Proctor, MN: when does the frost end?
Typically, the last spring freeze lands around 05/18, roughly 263 days out. Fall's first freeze usually shows up around 10/01, roughly 135 days after the last spring frost.
Zone 4b (-25 to -20°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 Proctor, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Proctor's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Proctor's last frost
05/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Proctor against the rest of the dataset
At roughly 135 frost-free days, Proctor places 37,863 of 40,283 ZIP codes in this dataset. Within MN, it ranks 802 of 943.
Learn more
Before leaning on 55810's figures: zone vs. frost date explains why Zone 4b and Proctor's frost date answer different questions, while the frost range explains how to read the range around Proctor's dates instead of trusting one.