U.S. Frost Dates by Weather Station

NOAA station USC00367029 · Pennsylvania

Frost Dates for Pleasant Mount, PA

NOAA weather station Pleasant Mount 1 W (USC00367029), Pennsylvania · elevation 1800 ft (549 m) · hardiness zone 5b*

  • Lower-risk planting dateafter May 29only 1 spring in 10 still has a frost later
  • Typical last frostMay 1450% chance of a frost after it
  • Typical first fall frostOctober 150% chance of a frost before it
  • Frost-free season140 daystypical year, 32°F
  • Hardiness zone5bcalculated*

The year at a glance

Frost season at Pleasant Mount, PASpring: a frost after April 30 in 9 years out of 10, after May 14 in half of the years, after May 29 in 1 year out of 10. Fall: the first frost comes before September 21 in 1 year out of 10, before October 1 in half of the years, before October 15 in 9 years out of 10. Typical frost-free season: 140 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 14First frost ~Oct 1Frost season at Pleasant Mount, PASpring: a frost after April 30 in 9 years out of 10, after May 14 in half of the years, after May 29 in 1 year out of 10. Fall: the first frost comes before September 21 in 1 year out of 10, before October 1 in half of the years, before October 15 in 9 years out of 10. Typical frost-free season: 140 days.JFMAMJJASONDLast frost ~May 14First frost ~Oct 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.

Frost dates (32°F)

Probability of frost, based on 30 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 29September 21
50% (typical)May 14October 1
90% (likely)April 30October 15
Frost-free season (32°F, 50% chance)
140 days
Hard frost (28°F), last in spring, 50% chance after
May 3
Hard frost (28°F), first in fall, 50% chance before
October 12

The last 15 years (2006–2020 normals)

Typical last frost May 11 (3 days earlier than the 30-year normal), typical first fall frost October 7 (6 days later). Frost-free season 146 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 Pleasant Mount: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 29, 20% May 24, 30% May 20, 40% May 17, 50% May 14, 60% May 11, 70% May 8, 80% May 5, 90% April 30. Observed last spring frost in recent years: 2022 May 9, 2023 May 18, 2026 May 12.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1May 29May 14Apr 302022: May 92023: May 182026: May 12Fall at Pleasant Mount: chance of a frost before this dateFall, chance of a frost before the date: 10% September 21, 20% September 24, 30% September 28, 40% September 30, 50% October 1, 60% October 4, 70% October 6, 80% October 10, 90% October 15. Observed first fall frost in recent years: 2022 October 9, 2023 October 24, 2024 October 17, 2025 October 10.Fall: first frostChance of a frost before this date10%50%90%Oct 1Sep 21Oct 1Oct 152022: October 92023: October 242024: 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
2021incomplete recordincomplete record
2022May 9October 9
2023May 18October 24
2024incomplete recordOctober 17
2025incomplete recordOctober 10
2026May 12season not over yet

What these dates mean

May 29 is the cautious spring date in Pleasant Mount; with only a 10% chance of a light frost after that day, a gardener can plan to set out tender crops. In the fall, September 21 serves as the cautious date, carrying a 10% chance of a light frost before it, so harvesting of tender crops can be scheduled to finish by then.

The 50% light-frost dates are May 14 and October 1. The May 14 date indicates a 50% chance of a light frost later than this date, while the October 1 date indicates a 50% chance of a light frost earlier than this date. The 50% hard-frost dates are May 3 and October 12, each representing a 50% chance of a hard frost later (spring) or earlier (fall) than the date.

A hard frost at 28 °F can damage plants that would survive a light frost at 32 °F.

How to read the probabilities

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

  • Spring: "10% after May 29" 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 21" 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 Pleasant Mount, PANumbered nearest stations: 1 — Hawley, PA — 23 mi; 2 — Wilkes-Barre, PA — 32 mi; 3 — Binghamton, NY — 42 mi; 4 — Port Jervis, NY — 46 mi; 5 — Towanda, PA — 51 mi.PANY25 mi · 40 km1. Hawley, PA — 23 mi12. Wilkes-Barre, PA — 32 mi23. Binghamton, NY — 42 mi34. Port Jervis, NY — 46 mi45. Towanda, PA — 51 mi5
  1. Hawley, PA 23 mi (37 km)
  2. Wilkes-Barre, PA 32 mi (51 km)
  3. Binghamton, NY 42 mi (68 km)
  4. Port Jervis, NY 46 mi (74 km)
  5. Towanda, PA 51 mi (83 km)

Sources

* Hardiness zone 5b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 41.7394, -75.4464.