Augusta, ME 04926 Frost Dates
04926, near Augusta, ME: the frost window
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.
Zone 5b (-15 to -10°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 Augusta, not a forecast for this year.
Stretching the season past the first frost
Augusta's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
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.
Augusta against the rest of the dataset
Augusta's growing season runs about 159 days, ranking 32,595 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 157 of 456.
Learn more
Two guides worth reading on 04926: local microclimates, on what one yard in Augusta can differ from the 04926 normal, and zone vs. frost date, on why Zone 5b and Augusta's frost date answer different questions.