Frost Dates for 23086 — King William, Virginia

Half of springs at Walkerton 2 NW, VA see their last 32°F night by April 7; only one in ten is past it by March 24, and one in ten still has one after April 23. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 18 20%, and after April 23 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 59% of the 128 Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 1 in half of years, as early as October 18 one year in ten, and holds off past November 14 one year in ten. A hard freeze of 28°F follows 10 days later, around November 11; in spring the one-in-ten date for 28°F is April 11, 12 days before the 32°F one. The freeze-free season lasts 209 days in a typical year, longer than at 75% of the 128 Virginia stations; it reaches 228 days one year in ten and falls short of 189 one year in ten. On average 82 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 12 days longer, to about April 19, and return around October 23. Severe cold of 16°F or below comes in 97% of winters, usually between December 30 and February 11.

July is the warmest month at Walkerton 2 NW, VA, averaging 88°F by day and 69°F at night; January is the coldest at 49°F and 29°F. A freezing night is all but certain in every month from November 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 69% of years.

Warmth for growing adds up to 4,611 growing degree days a year (base 50°F), more than at 89% of the 128 Virginia stations. 38% of them (1,740) have built up by the end of June, and July adds the most, 896. Precipitation totals 45.7 inches a year, most in July (4.8") and least in February (2.9"); May to September bring 47% of it.

The nearest other station, W Pt 2 NW, VA, 13 miles southeast of King William, has a last frost 1 day earlier (April 6), the same first-frost date, a season 1 day shorter.

The first measurable snow (0.1 inch or more) in King William usually arrives around January 9, and the last of the season around February 27. Those are the middle dates across the winters of 1991–2020 at Walkerton 2 NW, VA, 6.9 miles away: half of years saw snow earlier, half later. Snow fell in 90% of those winters. The last 32°F night of spring typically comes 39 days after the last snow.

ZIP 23086 is 7 miles from Walkerton 2 NW, VA, which stands at 50 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 23009 (Aylett). The 2023 USDA Plant Hardiness Zone Map lists ZIP 23086 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.