Caribou, ME 04772 Frost Dates
Caribou, ME: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/02, roughly 147 days after the last spring frost.
Caribou sits in USDA Zone 4a (-30 to -25°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 5 weeks until Caribou's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Caribou's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Caribou against the rest of the dataset
At roughly 147 frost-free days, Caribou places 35,890 of 40,283 ZIP codes in this dataset. Within ME, it ranks 330 of 456.
Learn more
Before leaning on 04772's figures: zone vs. frost date explains why Zone 4a and Caribou's frost date answer different questions, while the frost range explains how to read the range around Caribou's dates instead of trusting one.