Westbrook, ME 04049 Frost Dates
Westbrook, ME: when does the frost end?
The last spring frost here typically falls around 05/07, about 252 days from today. Fall's first freeze usually shows up around 10/04, roughly 148 days after the last spring frost.
Zone 5a (-20 to -15°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 Westbrook, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Westbrook's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Westbrook's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Westbrook against the rest of the dataset
At roughly 148 frost-free days, Westbrook places 35,660 of 40,283 ZIP codes in this dataset. Within ME, it ranks 311 of 456.
Learn more
Before leaning on 04049's figures: the frost range explains how to read the range around Westbrook's dates instead of trusting one, while local microclimates explains what one yard in Westbrook can differ from the 04049 normal.