Frost Dates for 23920 — Brodnax, Virginia

Half of springs at Lawrenceville 3 E, VA see their last 32°F night by April 7; only one in ten is past it by March 22, and one in ten still has one after April 22. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 18 20%, and after April 22 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 70% of the 128 Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 31 in half of years, as early as October 16 one year in ten, and holds off past November 12 one year in ten. A hard freeze of 28°F follows 7 days later, around November 7; in spring the one-in-ten date for 28°F is April 12, 10 days before the 32°F one. The freeze-free season lasts 205 days in a typical year, longer than at 66% of the 128 Virginia stations; it reaches 224 days one year in ten and falls short of 186 one year in ten. On average 101 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 13 days longer, to about April 20, and return around October 21. Severe cold of 16°F or below comes in 93% of winters, usually between December 31 and February 6.

July is the warmest month at Lawrenceville 3 E, VA, averaging 90°F by day and 67°F at night; January is the coldest at 50°F and 27°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 71% of years.

Warmth for growing adds up to 4,419 growing degree days a year (base 50°F), more than at 81% of the 128 Virginia stations. 38% of them (1,671) have built up by the end of June, and July adds the most, 880.

The nearest other station, John H Kerr Dam, VA, 19 miles southwest of Brodnax, has a last frost 2 days earlier (April 5), a first frost 1 day later (November 1), a season 5 days longer.

The first measurable snow (0.1 inch or more) in Brodnax usually arrives around January 18, and the last of the season around February 26. Those are the middle dates across the winters of 1991–2020 at Alberta 5 N, VA, 15.3 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 23920 is 12 miles from Lawrenceville 3 E, VA, which stands at 325 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 23868 (Lawrenceville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 23920 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.