U.S. Frost Dates by Weather Station

NOAA station USC00300889 · New York

Frost Dates for Bridgehampton, NY

NOAA weather station Bridgehampton (USC00300889), New York · elevation 42 ft (13 m) · hardiness zone 7a*

  • Lower-risk planting dateafter May 8only 1 spring in 10 still has a frost later
  • Typical last frostApril 2350% chance of a frost after it
  • Typical first fall frostOctober 2450% chance of a frost before it
  • Frost-free season182 daystypical year, 32°F
  • Hardiness zone7acalculated*

The year at a glance

Frost season at Bridgehampton, NYSpring: a frost after April 11 in 9 years out of 10, after April 23 in half of the years, after May 8 in 1 year out of 10. Fall: the first frost comes before October 11 in 1 year out of 10, before October 24 in half of the years, before November 7 in 9 years out of 10. Typical frost-free season: 182 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 23First frost ~Oct 24Frost season at Bridgehampton, NYSpring: a frost after April 11 in 9 years out of 10, after April 23 in half of the years, after May 8 in 1 year out of 10. Fall: the first frost comes before October 11 in 1 year out of 10, before October 24 in half of the years, before November 7 in 9 years out of 10. Typical frost-free season: 182 days.JFMAMJJASONDLast frost ~Apr 23First frost ~Oct 24
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.

Frost dates (32°F)

Probability of frost, based on 28 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 8October 11
50% (typical)April 23October 24
90% (likely)April 11November 7
Frost-free season (32°F, 50% chance)
182 days
Hard frost (28°F), last in spring, 50% chance after
April 8
Hard frost (28°F), first in fall, 50% chance before
November 5

The last 15 years (2006–2020 normals)

Typical last frost April 21 (2 days earlier than the 30-year normal), typical first fall frost October 28 (4 days later). Frost-free season 188 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 Bridgehampton: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 8, 20% May 3, 30% April 30, 40% April 26, 50% April 23, 60% April 20, 70% April 18, 80% April 15, 90% April 11. Observed last spring frost in recent years: 2022 April 22, 2023 April 11, 2024 April 27, 2025 April 18, 2026 April 26.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1May 8Apr 23Apr 112022: April 222023: April 112024: April 272025: April 182026: April 26Fall at Bridgehampton: chance of a frost before this dateFall, chance of a frost before the date: 10% October 11, 20% October 15, 30% October 18, 40% October 21, 50% October 24, 60% October 27, 70% October 30, 80% November 2, 90% November 7. Observed first fall frost in recent years: 2021 November 6, 2022 November 15, 2023 November 3, 2025 October 25.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Oct 11Oct 24Nov 72021: November 62022: November 152023: November 32025: October 25
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
2021incomplete recordNovember 6
2022April 22November 15
2023April 11November 3
2024April 27incomplete record
2025April 18October 25
2026April 26season not over yet

What these dates mean

The cautious fall date in Bridgehampton for finishing the harvest is October 11, which carries a 10% chance of a light frost occurring earlier. By contrast, November 7 is a gamble, with a 90% chance that a light frost has already arrived.

The 50% date for light frost in spring is April 23 and in fall is October 24; each marks an even odds point for a frost later in spring or earlier in fall. Gardeners who want to reduce risk in spring use the cautious date of May 8, the point at which only a 10% chance of a later light frost remains, while the early spring date of April 11 carries a 90% chance and is a gamble.

The median hard-frost dates are April 8 in spring and November 5 in fall, and hard frost at 28 °F can injure plants that would survive a 32 °F light frost, making it the more hazardous temperature.

How to read the probabilities

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

  • Spring: "10% after May 8" 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 11" 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 Bridgehampton, NYNumbered nearest stations: 1 — Riverhead, NY — 22 mi; 2 — near Norwich, CT — 42 mi; 3 — near Islip, NY — 43 mi; 4 — near Bridgeport, CT — 46 mi; 5 — Kingston, RI — 54 mi.CTNY25 mi · 40 km1. Riverhead, NY — 22 mi12. near Norwich, CT — 42 mi23. near Islip, NY — 43 mi34. near Bridgeport, CT — 46 mi45. Kingston, RI — 54 mi5
  1. Riverhead, NY 22 mi (35 km)
  2. near Norwich, CT 42 mi (67 km)
  3. near Islip, NY 43 mi (70 km)
  4. near Bridgeport, CT 46 mi (73 km)
  5. Kingston, RI 54 mi (87 km)

Sources

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

Station coordinates: 40.9519, -72.2978.