Waterville, ME 04955 Frost Dates
Frost dates for Waterville, ME, ZIP 04955
Typically, the last spring freeze lands around 05/07, roughly 252 days out. The first fall frost typically arrives around 10/02, about 146 frost-free days later.
Waterville sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5a around Waterville has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/07 isn't a guarantee
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Waterville compares
About 146 days separate Waterville's last and first frost, putting it 36,030 of 40,283 ZIP codes nationally. Within ME, it ranks 345 of 456.
Learn more
zone vs. frost date explains why Zone 5a and Waterville's frost date answer different questions, and the frost range explains how to read the range around Waterville's dates instead of trusting one.