Frost Dates for 05733 — Brandon, Vermont

Half of springs at Salisbury 2 N, VT see their last 32°F night by May 21; only one in ten is past it by May 4, and one in ten still has one after June 7. Planting tender crops after May 28 leaves a 30% risk of a frost on them, after June 1 20%, and after June 7 10%. The 17 days between the even-odds date and the one-in-ten date is the widest of the 41 Vermont stations behind this site's ZIP pages.

In fall the first 32°F night comes by September 26 in half of years, as early as September 13 one year in ten, and holds off past October 8 one year in ten. A hard freeze of 28°F follows 10 days later, around October 6; in spring the one-in-ten date for 28°F is May 23, 15 days before the 32°F one. The freeze-free season lasts 127 days in a typical year, shorter than at 93% of the 41 Vermont stations; it reaches 148 days one year in ten and falls short of 104 one year in ten. On average 168 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 14 days longer, to about June 4, and return around September 15. Severe cold of 16°F or below comes every winter, usually between November 12 and April 4.

July is the warmest month at Salisbury 2 N, VT, averaging 84°F by day and 56°F at night; January is the coldest at 31°F and 9°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 21% of years.

Warmth for growing adds up to 2,361 growing degree days a year (base 50°F), more than at 78% of the 41 Vermont stations. 32% of them (748) have built up by the end of June, and July adds the most, 615. Precipitation totals 41.2 inches a year, most in July (4.8") and least in February (2.0"); May to September bring 50% of it.

The nearest other station, Cornwall, VT, 12 miles northwest of Brandon, has a last frost 16 days earlier (May 5), a first frost 7 days later (October 3), a season 24 days longer.

The first measurable snow (0.1 inch or more) in Brandon usually arrives around November 14, and the last of the season around April 7. Those are the middle dates across the winters of 1991–2020 at Salisbury 2 N, VT, 8 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 44 days after the last snow.

ZIP 05733 is 8 miles from Salisbury 2 N, VT, which stands at 420 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 05733 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.