Augusta, ME 04935 Frost Dates
04935, near Augusta, ME: the frost window
Around 04/27 is the usual last spring frost, about 242 days away. Fall's first freeze usually shows up around 10/16, 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
Augusta's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Augusta's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 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 28,204 of 40,283 ZIP codes in this dataset. Within ME, it ranks 97 of 456.
Learn more
Two guides worth reading on 04935: zone vs. frost date, on why Zone 5b and Augusta's frost date answer different questions, and the frost range, on how to read the range around Augusta's dates instead of trusting one.