Waterville, ME 04901 Frost Dates
Waterville, ME: when does the frost end?
The last spring frost here typically falls around 05/02, about 247 days from today. Fall's first freeze usually shows up around 10/10, roughly 159 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Waterville in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 6 weeks until Waterville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Waterville's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Waterville against the rest of the dataset
At roughly 159 frost-free days, Waterville places 32,598 of 40,283 ZIP codes in this dataset. Within ME, it ranks 160 of 456.
Learn more
Before leaning on 04901's figures: local microclimates explains what one yard in Waterville can differ from the 04901 normal, while zone vs. frost date explains why Zone 5b and Waterville's frost date answer different questions.