Frost Dates for 08829 — High Bridge, New Jersey

Half of springs at Flemington 5 NNW, NJ see their last 32°F night by April 24; only one in ten is past it by April 9, and one in ten still has one after May 11. Planting tender crops after April 30 leaves a 30% risk of a frost on them, after May 5 20%, and after May 11 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 64% of the 56 New Jersey stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 21 in half of years, as early as October 6 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 12 days later, around November 2; in spring the one-in-ten date for 28°F is April 25, 16 days before the 32°F one. The freeze-free season lasts 179 days in a typical year, shorter than at 79% of the 56 New Jersey stations; it reaches 201 days one year in ten and falls short of 157 one year in ten. On average 124 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 6, and return around October 9. Severe cold of 16°F or below comes every winter, usually between December 10 and March 5.

July is the warmest month at Flemington 5 NNW, NJ, averaging 86°F by day and 63°F at night; January is the coldest at 38°F and 21°F. A freezing night is all but certain in every month from November 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 30% of years.

Warmth for growing adds up to 3,197 growing degree days a year (base 50°F), fewer than at 77% of the 56 New Jersey stations. 33% of them (1,053) have built up by the end of June, and July adds the most, 763. Precipitation totals 50.9 inches a year, most in July (4.9") and least in February (3.1"); May to September bring 44% of it.

The nearest other station, Somerville Somerset Airport, NJ, 12 miles east of High Bridge and 160 feet lower, has a last frost 2 days later (April 26), a first frost 3 days earlier (October 18), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in High Bridge usually arrives around December 6, and the last of the season around March 21. Those are the middle dates across the winters of 1991–2020 at Flemington 5 NNW, NJ, 6.6 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 34 days after the last snow.

ZIP 08829 is 7 miles from Flemington 5 NNW, NJ, which stands at 265 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station; its figures are presented in full for 08822 (Flemington). The 2023 USDA Plant Hardiness Zone Map lists ZIP 08829 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.