Frost Dates for 05672 — Stowe, Vermont

Half of springs at Morrisville 4 SSW, VT see their last 32°F night by May 24; only one in ten is past it by May 12, and one in ten still has one after June 5. Planting tender crops after May 29 leaves a 30% risk of a frost on them, after June 1 20%, and after June 5 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 85% of the 41 Vermont stations behind this site's ZIP pages.

In fall the first 32°F night comes by September 27 in half of years, as early as September 13 one year in ten, and holds off past October 7 one year in ten. A hard freeze of 28°F follows 9 days later, around October 6; in spring the one-in-ten date for 28°F is May 26, 10 days before the 32°F one. The freeze-free season lasts 123 days in a typical year, shorter than at 98% of the 41 Vermont stations; it reaches 139 days one year in ten and falls short of 105 one year in ten. On average 189 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 11 days longer, to about June 4, and return around September 15. Severe cold of 16°F or below comes every winter, usually between November 11 and April 7.

July is the warmest month at Morrisville 4 SSW, VT, averaging 77°F by day and 54°F at night; January is the coldest at 25°F and 3°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 23% of years.

Warmth for growing adds up to 1,632 growing degree days a year (base 50°F), fewer than at 93% of the 41 Vermont stations. 28% of them (458) have built up by the end of June, and July adds the most, 479.

The nearest other station, Morrisville Stowe State Airport, VT, 6 miles northeast of Stowe, has a last frost 4 days earlier (May 20), a first frost 1 day later (September 28), a season 6 days longer.

The first measurable snow (0.1 inch or more) in Stowe usually arrives around October 31, and the last of the season around April 14. Those are the middle dates across the winters of 1991–2020 at Morrisville 4 SSW, VT, 4.7 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 40 days after the last snow.

ZIP 05672 is 5 miles from Morrisville 4 SSW, VT, which stands at 760 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 05672 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.