Waterville, ME 04982 Frost Dates
Frost dates for Waterville, ME, ZIP 04982
Around 05/24 is the usual last spring frost, about 269 days away. The first fall frost typically arrives around 09/21, about 118 frost-free days later.
Waterville sits in USDA Zone 4b (-25 to -20°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 4b around Waterville has about 3 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.
The actual range around Waterville's last frost
05/24 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Waterville compares
Waterville's growing season runs about 118 days, ranking 39,194 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 445 of 456.
Learn more
the frost range explains how to read the range around Waterville's dates instead of trusting one, and local microclimates explains what one yard in Waterville can differ from the 04982 normal.