Frost Dates for 04457 — Lincoln, Maine

Half of springs at Lincoln Sanitary District/Wtp, ME see their last 32°F night by May 4; only one in ten is past it by April 25, and one in ten still has one after May 16. Planting tender crops after May 8 leaves a 30% risk of a frost on them, after May 11 20%, and after May 16 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 67% of the 52 Maine stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 6 in half of years, as early as September 24 one year in ten, and holds off past October 20 one year in ten. A hard freeze of 28°F follows 12 days later, around October 18; in spring the one-in-ten date for 28°F is May 4, 12 days before the 32°F one. The freeze-free season lasts 153 days in a typical year, longer than at 58% of the 52 Maine stations; it reaches 170 days one year in ten and falls short of 137 one year in ten. On average 167 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 13 days longer, to about May 17, and return around September 26. Severe cold of 16°F or below comes every winter, usually between November 21 and March 31.

July is the warmest month at Lincoln Sanitary District/Wtp, ME, averaging 79°F by day and 59°F at night; January is the coldest at 26°F and 3°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 68% of years.

Warmth for growing adds up to 2,042 growing degree days a year (base 50°F), more than at 52% of the 52 Maine stations. 29% of them (592) have built up by the end of June, and July adds the most, 590. Precipitation totals 44.3 inches a year, most in October (4.7") and least in February (2.4"); May to September bring 41% of it.

The nearest other station, Millinocket, ME, 22 miles northwest of Lincoln and 170 feet higher, has a last frost 5 days later (May 9), a first frost 1 day earlier (October 5), a season 6 days shorter.

The first measurable snow (0.1 inch or more) in Lincoln usually arrives around November 12, and the last of the season around April 6. Those are the middle dates across the winters of 1991–2020 at Millinocket, ME, 22.2 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 28 days after the last snow.

ZIP 04457 is 1 mile from Lincoln Sanitary District/Wtp, ME, which stands at 190 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 04457 in zone 5a, the band where the coldest night of the year averaged -20 to -15°F (-28.9 to -26.1°C) over 1991–2020; a zone describes winter lows, not frost dates.