Waterville, ME 04945 Frost Dates
Waterville, ME: when does the frost end?
The last spring frost here typically falls around 05/26, about 271 days from today. Fall's first freeze usually shows up around 09/23, roughly 119 days after the last spring frost.
Waterville 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 Waterville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/26 isn't a guarantee
05/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Waterville against the rest of the dataset
At roughly 119 frost-free days, Waterville places 39,130 of 40,283 ZIP codes in this dataset. Within ME, it ranks 440 of 456.
Learn more
Before leaning on 04945's figures: the frost range explains how to read the range around Waterville's dates instead of trusting one, while local microclimates explains what one yard in Waterville can differ from the 04945 normal.