Frost Dates for 22534 — Partlow, Virginia

Half of springs at Corbin, VA see their last 32°F night by April 14; only one in ten is past it by March 30, and one in ten still has one after May 4. Planting tender crops after April 21 leaves a 30% risk of a frost on them, after April 25 20%, and after May 4 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 84% of the 128 Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 27 in half of years, as early as October 13 one year in ten, and holds off past November 8 one year in ten. A hard freeze of 28°F follows 10 days later, around November 6; in spring the one-in-ten date for 28°F is April 14, 20 days before the 32°F one. The freeze-free season lasts 195 days in a typical year, shorter than at 52% of the 128 Virginia stations; it reaches 216 days one year in ten and falls short of 171 one year in ten. On average 93 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 April 28, and return around October 16. Severe cold of 16°F or below comes every winter, usually between December 24 and February 24.

July is the warmest month at Corbin, VA, averaging 87°F by day and 67°F at night; January is the coldest at 45°F and 26°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 83% of years and May still brings one in 16% of years.

Warmth for growing adds up to 4,018 growing degree days a year (base 50°F), more than at 59% of the 128 Virginia stations. 37% of them (1,470) have built up by the end of June, and July adds the most, 840. Precipitation totals 44.8 inches a year, most in September (4.7") and least in February (2.9"); May to September bring 45% of it.

The nearest other station, Fredericksburg Sewage, VA, 18 miles northeast of Partlow and 160 feet lower, has a last frost 8 days earlier (April 6), a first frost 5 days later (November 1), a season 12 days longer.

The first measurable snow (0.1 inch or more) in Partlow usually arrives around December 31, and the last of the season around February 15. Those are the middle dates across the winters of 1991–2020 at Corbin, VA, 18 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 58 days after the last snow.

ZIP 22534 is 18 miles from Corbin, VA, which stands at 220 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 22485 (King George). The 2023 USDA Plant Hardiness Zone Map lists ZIP 22534 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.