Frost Dates for 08043 — Voorhees, New Jersey

Half of springs at Moorestown, NJ see their last 32°F night by April 12; only one in ten is past it by March 28, and one in ten still has one after May 3. Planting tender crops after April 21 leaves a 30% risk of a frost on them, after April 27 20%, and after May 3 10%. The 21 days between the even-odds date and the one-in-ten date is wider than at 98% of the 56 New Jersey stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by November 1 in half of years, as early as October 17 one year in ten, and holds off past November 14 one year in ten. A hard freeze of 28°F follows 11 days later, around November 12; in spring the one-in-ten date for 28°F is April 16, 17 days before the 32°F one. The freeze-free season lasts 200 days in a typical year, longer than at 64% of the 56 New Jersey stations; it reaches 223 days one year in ten and falls short of 174 one year in ten. On average 102 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 17 days longer, to about April 29, and return around October 19. Severe cold of 16°F or below comes in 98% of winters, usually between January 1 and February 19.

July is the warmest month at Moorestown, NJ, averaging 88°F by day and 67°F at night; January is the coldest at 43°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 79% of years and May still brings one in 13% of years.

Warmth for growing adds up to 3,860 growing degree days a year (base 50°F), more than at 88% of the 56 New Jersey stations. 35% of them (1,340) have built up by the end of June, and July adds the most, 849. Precipitation totals 49.4 inches a year, most in July (5.4") and least in February (2.7"); May to September bring 45% of it.

The nearest other station, Pennsauken 1N, NJ, 9 miles north of Voorhees, has a last frost 3 days later (April 15), a first frost 1 day earlier (October 31), a season 1 day shorter.

The first measurable snow (0.1 inch or more) in Voorhees usually arrives around December 11, and the last of the season around March 18. Those are the middle dates across the winters of 1991–2020 at Somerdale 4 SW, NJ, 4.5 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 25 days after the last snow.

ZIP 08043 is 7 miles from Moorestown, NJ, which stands at 45 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 8 other ZIP codes share the station; its figures are presented in full for 08003 (Cherry Hill). The 2023 USDA Plant Hardiness Zone Map lists ZIP 08043 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.