Augusta, ME 04348 Frost Dates
Augusta, ME: when does the frost end?
The last spring frost here typically falls around 04/27, about 242 days from today. Fall's first freeze usually shows up around 10/18, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Augusta 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 7 weeks until Augusta's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Augusta against the rest of the dataset
At roughly 172 frost-free days, Augusta places 28,201 of 40,283 ZIP codes in this dataset. Within ME, it ranks 94 of 456.
Learn more
Before leaning on 04348's figures: local microclimates explains what one yard in Augusta can differ from the 04348 normal, while zone vs. frost date explains why Zone 5b and Augusta's frost date answer different questions.