Frost Dates for 08055 — Medford, New Jersey

Half of springs at Indian Mills 2 W, NJ see their last 32°F night by April 28; only one in ten is past it by April 14, and one in ten still has one after May 16. Planting tender crops after May 4 leaves a 30% risk of a frost on them, after May 9 20%, and after May 16 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 80% of the 56 New Jersey stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 15 in half of years, as early as October 3 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 12 days later, around October 27; in spring the one-in-ten date for 28°F is April 30, 16 days before the 32°F one. The freeze-free season lasts 169 days in a typical year, shorter than at 95% of the 56 New Jersey stations; it reaches 191 days one year in ten and falls short of 149 one year in ten. On average 112 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 May 10, and return around October 5. Severe cold of 16°F or below comes every winter, usually between December 5 and March 6.

July is the warmest month at Indian Mills 2 W, NJ, averaging 87°F by day and 64°F at night; January is the coldest at 42°F and 24°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 40% of years.

Warmth for growing adds up to 3,501 growing degree days a year (base 50°F), more than at 52% of the 56 New Jersey stations. 34% of them (1,191) have built up by the end of June, and July adds the most, 792. Precipitation totals 50.5 inches a year, most in August (5.3") and least in February (3.0"); May to September bring 46% of it.

The nearest other station, Mt Holly S Jersey Airport, NJ, 6 miles north of Medford, has a last frost 13 days earlier (April 15), a first frost 13 days later (October 28), a season 26 days longer.

The first measurable snow (0.1 inch or more) in Medford usually arrives around December 26, and the last of the season around March 2. Those are the middle dates across the winters of 1991–2020 at Indian Mills 2 W, NJ, 5 miles away: half of years saw snow earlier, half later. Snow fell in 97% of those winters. The last 32°F night of spring typically comes 57 days after the last snow.

ZIP 08055 is 5 miles from Indian Mills 2 W, NJ, which stands at 100 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 08055 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.