Frost Dates for 22473 — Heathsville, Virginia

Half of springs at St Inigoes Webster Nolf, MD see their last 32°F night by March 30; only one in ten is past it by March 14, and one in ten still has one after April 11. Planting tender crops after April 3 leaves a 30% risk of a frost on them, after April 7 20%, and after April 11 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 97% of the 128 Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 14 in half of years, as early as October 29 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 15 days later, around November 29; in spring the one-in-ten date for 28°F is April 1, 10 days before the 32°F one. The freeze-free season lasts 229 days in a typical year, longer than at 93% of the 128 Virginia stations; it reaches 250 days one year in ten and falls short of 209 one year in ten. On average 69 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 April 10, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 81%.

July is the warmest month at St Inigoes Webster Nolf, MD, averaging 87°F by day and 71°F at night; January is the coldest at 46°F and 30°F. A freezing night is all but certain in every month from December to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 41% of years.

Warmth for growing adds up to 4,397 growing degree days a year (base 50°F), more than at 80% of the 128 Virginia stations. 36% of them (1,603) have built up by the end of June, and July adds the most, 905.

The nearest other station, Warsaw 2 NW, VA, 23 miles west of Heathsville, has a last frost 9 days later (April 8), a first frost 15 days earlier (October 30), a season 25 days shorter.

The first measurable snow (0.1 inch or more) in Heathsville usually arrives around December 25, and the last of the season around February 25. Those are the middle dates across the winters of 1991–2020 at Warsaw 2 NW, VA, 23.5 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 33 days after the last snow.

ZIP 22473 is 18 miles from St Inigoes Webster Nolf, MD, which stands at 21 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 22473 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.