Frost Dates for 23437 — Suffolk, Virginia

Half of springs at Holland 1 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 25. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 18 20%, and after April 25 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 52% of the 128 Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 2 in half of years, as early as October 19 one year in ten, and holds off past November 15 one year in ten. A hard freeze of 28°F follows 10 days later, around November 12; in spring the one-in-ten date for 28°F is April 8, 17 days before the 32°F one. The freeze-free season lasts 208 days in a typical year, longer than at 73% of the 128 Virginia stations; it reaches 228 days one year in ten and falls short of 186 one year in ten. On average 84 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 21, and return around October 24. Severe cold of 16°F or below comes in 93% of winters, usually between January 5 and February 6.

July is the warmest month at Holland 1 E, VA, averaging 89°F by day and 69°F at night; January is the coldest at 50°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 72% of years.

Warmth for growing adds up to 4,595 growing degree days a year (base 50°F), more than at 88% of the 128 Virginia stations. 37% of them (1,709) have built up by the end of June, and July adds the most, 891. Precipitation totals 48.0 inches a year, most in September (5.6") and least in February (2.9"); May to September bring 49% of it.

The nearest other station, Suffolk Lake Kilby, VA, 14 miles northeast of Suffolk, has a last frost 11 days earlier (March 27), a first frost 13 days later (November 15), a season 25 days longer.

Measurable snow is rare here: only 9 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Holland 1 E, VA, 4.1 miles away, so there is no typical first-snow date to plan around.

ZIP 23437 is 4 miles from Holland 1 E, VA, which stands at 80 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 23851 (Franklin). The 2023 USDA Plant Hardiness Zone Map lists ZIP 23437 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.