Westbrook, ME 04110 Frost Dates
When can you plant in Westbrook, ME?
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/15, about 170 frost-free days later.
Zone 6a (-10 to -5°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.
What to do before the first frost
About 7 weeks of growing season left in Westbrook before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Westbrook compares
About 170 days separate Westbrook's last and first frost, putting it 28,916 of 40,283 ZIP codes nationally. Within ME, it ranks 130 of 456.
Learn more
zone vs. frost date covers why Zone 6a and Westbrook's frost date answer different questions. the frost range covers how to read the range around Westbrook's dates instead of trusting one.