U.S. Frost Dates by Weather Station

NOAA station USC00306774 · New York

Frost Dates for Port Jervis, NY

NOAA weather station Port Jervis (USC00306774), New York · elevation 580 ft (177 m) · hardiness zone 6b*

  • Lower-risk planting dateafter May 19only 1 spring in 10 still has a frost later
  • Typical last frostMay 550% chance of a frost after it
  • Typical first fall frostOctober 1050% chance of a frost before it
  • Frost-free season158 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Port Jervis, NYSpring: a frost after April 22 in 9 years out of 10, after May 5 in half of the years, after May 19 in 1 year out of 10. Fall: the first frost comes before September 28 in 1 year out of 10, before October 10 in half of the years, before October 29 in 9 years out of 10. Typical frost-free season: 158 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 5First frost ~Oct 10Frost season at Port Jervis, NYSpring: a frost after April 22 in 9 years out of 10, after May 5 in half of the years, after May 19 in 1 year out of 10. Fall: the first frost comes before September 28 in 1 year out of 10, before October 10 in half of the years, before October 29 in 9 years out of 10. Typical frost-free season: 158 days.JFMAMJJASONDLast frost ~May 5First frost ~Oct 10
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 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 19September 28
50% (typical)May 5October 10
90% (likely)April 22October 29
Frost-free season (32°F, 50% chance)
158 days
Hard frost (28°F), last in spring, 50% chance after
April 23
Hard frost (28°F), first in fall, 50% chance before
October 24

The last 15 years (2006–2020 normals)

Typical last frost May 3 (2 days earlier than the 30-year normal), typical first fall frost October 20 (10 days later). Frost-free season 167 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 Port Jervis: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 19, 20% May 14, 30% May 11, 40% May 8, 50% May 5, 60% May 2, 70% April 30, 80% April 26, 90% April 22. Observed last spring frost in recent years: 2021 May 13, 2022 May 2, 2023 May 18, 2024 April 27, 2025 April 19, 2026 May 12.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1May 19May 5Apr 222021: May 132022: May 22023: May 182024: April 272025: April 192026: May 12Fall at Port Jervis: chance of a frost before this dateFall, chance of a frost before the date: 10% September 28, 20% October 1, 30% October 4, 40% October 7, 50% October 10, 60% October 14, 70% October 18, 80% October 22, 90% October 29. Observed first fall frost in recent years: 2021 November 3, 2022 October 19, 2023 November 2, 2024 October 17, 2025 October 10.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Sep 28Oct 10Oct 292021: November 32022: October 192023: November 22024: October 172025: October 10
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
2021May 13November 3
2022May 2October 19
2023May 18November 2
2024April 27October 17
2025April 19October 10
2026May 12season not over yet

What these dates mean

Port Jervis enjoys a 158-day span between the 32 °F 50 % dates, defining the primary window for tender crops. The 50 % dates—May 5 in spring and October 10 in fall—mark the point where a light frost is equally likely to happen on either side of the date. For a cautious spring plan, May 19 carries a 10 % chance of a frost later, so it is used to set out tender crops. In fall, September 28 has a 10 % chance of a frost earlier and serves as the cautious date to finish harvesting tender crops. A hard frost at 28 °F—April 23 in spring and October 24 in fall—poses a greater risk because plants that can survive a light frost often cannot survive the colder temperature. These probabilities are based on a 27-year record.

How to read the probabilities

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

  • Spring: "10% after May 19" 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 September 28" 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 Port Jervis, NYNumbered nearest stations: 1 — Hawley, PA — 25 mi; 2 — near New Paltz, NY — 38 mi; 3 — Pleasant Mount, PA — 46 mi; 4 — Yorktown Heights, NY — 47 mi; 5 — Wilkes-Barre, PA — 54 mi.NYPANJ25 mi · 40 km1. Hawley, PA — 25 mi12. near New Paltz, NY — 38 mi23. Pleasant Mount, PA — 46 mi34. Yorktown Heights, NY — 47 mi45. Wilkes-Barre, PA — 54 mi5
  1. Hawley, PA 25 mi (41 km)
  2. near New Paltz, NY 38 mi (61 km)
  3. Pleasant Mount, PA 46 mi (74 km)
  4. Yorktown Heights, NY 47 mi (76 km)
  5. Wilkes-Barre, PA 54 mi (87 km)

Sources

* Hardiness zone 6b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 41.3892, -74.6906.