U.S. Frost Dates by Weather Station

NOAA station USC00287936 · New Jersey

Frost Dates for Seabrook Farms, NJ

NOAA weather station Seabrook Farms (USC00287936), New Jersey · elevation 104 ft (32 m) · hardiness zone 7b*

  • Lower-risk planting dateafter April 25only 1 spring in 10 still has a frost later
  • Typical last frostApril 1050% chance of a frost after it
  • Typical first fall frostNovember 150% chance of a frost before it
  • Frost-free season205 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Seabrook Farms, NJSpring: a frost after March 28 in 9 years out of 10, after April 10 in half of the years, after April 25 in 1 year out of 10. Fall: the first frost comes before October 16 in 1 year out of 10, before November 1 in half of the years, before November 15 in 9 years out of 10. Typical frost-free season: 205 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 10First frost ~Nov 1Frost season at Seabrook Farms, NJSpring: a frost after March 28 in 9 years out of 10, after April 10 in half of the years, after April 25 in 1 year out of 10. Fall: the first frost comes before October 16 in 1 year out of 10, before November 1 in half of the years, before November 15 in 9 years out of 10. Typical frost-free season: 205 days.JFMAMJJASONDLast frost ~Apr 10First frost ~Nov 1
frost likely chance fading 90% → 10% frost-free in a typical yearThe year at a glance. Blue: frost is likely; the gradient fades as the chance drops from 90% to 10%; green: the frost-free part of a typical year.Today

Frost dates (32°F)

Probability of frost, based on 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 25October 16
50% (typical)April 10November 1
90% (likely)March 28November 15
Frost-free season (32°F, 50% chance)
205 days
Hard frost (28°F), last in spring, 50% chance after
March 29
Hard frost (28°F), first in fall, 50% chance before
November 13

The last 15 years (2006–2020 normals)

Typical last frost April 9 (1 day earlier than the 30-year normal), typical first fall frost November 4 (3 days later). Frost-free season 208 days.

A shorter, more recent NOAA period. The 30-year normals above remain the main reference: 15 years carry more year-to-year noise.

Add these dates to your calendar Yearly reminders for the typical last frost, the lower-risk planting date and the typical first fall frost (.ics).

How the chance of frost changes with the date

Spring at Seabrook Farms: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 25, 20% April 20, 30% April 16, 40% April 12, 50% April 10, 60% April 6, 70% April 3, 80% March 31, 90% March 28. Observed last spring frost in recent years: 2021 April 3, 2022 April 11, 2023 April 10, 2024 March 25, 2025 April 9.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 25Apr 10Mar 282021: April 32022: April 112023: April 102024: March 252025: April 9Fall at Seabrook Farms: chance of a frost before this dateFall, chance of a frost before the date: 10% October 16, 20% October 22, 30% October 26, 40% October 30, 50% November 1, 60% November 4, 70% November 7, 80% November 11, 90% November 15. Observed first fall frost in recent years: 2021 November 2, 2022 November 15, 2023 November 2, 2024 November 10, 2025 November 11.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 16Nov 1Nov 152021: November 22022: November 152023: November 22024: November 102025: November 11
Two charts, because spring and fall answer different questions: in spring, the chance that a frost still comes after a date; in fall, the chance that the first frost has already come before it. NOAA publishes these odds from 10% to 90%, so the lines stop there. ◆ marks the actual date in each recent year.

What actually happened in recent years

Observed dates of the last spring and first fall frost (32°F) at this station; ◆ marks them on the charts above
YearLast spring frostFirst fall frost
2021April 3November 2
2022April 11November 15
2023April 10November 2
2024March 25November 10
2025April 9November 11
2026incomplete recordseason not over yet

What these dates mean

The 205 days between the 32°F 50% dates of April 10 and November 1 in Seabrook Farms mark the span during which the chance of a light frost is less than 50 % in either direction. Gardeners can treat this interval as the core window for activities that are vulnerable to frost.

In spring, the cautious light-frost date for setting out tender crops is April 25, when there is only a 10 % chance of a frost occurring later; planting on March 28 carries a 90 % chance of a frost later and is a gamble. In fall, the cautious date to finish harvesting tender crops is October 16, with a 10 % chance of a frost earlier, while November 15 carries a 90 % chance of an early frost and is risky.

The 50% hard-frost dates of March 29 and November 13 show when a 28°F frost is equally likely to have happened or not, and a hard frost can damage plants more severely than a light 32°F frost.

How to read the probabilities

The dates are probabilities from 30 years of weather, not a forecast for this year.

  • Spring: "10% after April 25" means that in about one spring out of ten a frost still happens after that date. The 90% date is the earliest: a frost after it happens in most years.
  • Fall: "10% before October 16" means that in about one fall out of ten the first frost arrives before that date.
  • 50% is the typical date: half of the years are earlier, half are later.
  • A light frost (32°F) damages tender plants; a hard frost (28°F) also stops most hardy vegetables.

Nearby weather stations

Map of weather stations near Seabrook Farms, NJNumbered nearest stations: 1 — Millville, NJ — 12 mi; 2 — Estell Manor, NJ — 22 mi; 3 — near Wilmington Manor, DE — 24 mi; 4 — near Wilmington, DE — 26 mi; 5 — Philadelphia, PA — 26 mi.NJPAMDDE25 mi · 40 km1. Millville, NJ — 12 mi12. Estell Manor, NJ — 22 mi23. near Wilmington Manor, DE — 24 mi34. near Wilmington, DE — 26 mi45. Philadelphia, PA — 26 mi5
  1. Millville, NJ 12 mi (19 km)
  2. Estell Manor, NJ 22 mi (35 km)
  3. near Wilmington Manor, DE 24 mi (39 km)
  4. near Wilmington, DE 26 mi (42 km)
  5. Philadelphia, PA 26 mi (42 km)

Sources

* Hardiness zone 7b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 39.4872, -75.22.