U.S. Frost Dates by Weather Station

NOAA station USC00364432 · Pennsylvania

Frost Dates for Kane, PA

NOAA weather station Kane 1 NNE (USC00364432), Pennsylvania · elevation 1750 ft (533 m) · hardiness zone 5b*

  • Lower-risk planting dateafter June 7only 1 spring in 10 still has a frost later
  • Typical last frostMay 2450% chance of a frost after it
  • Typical first fall frostSeptember 2850% chance of a frost before it
  • Frost-free season126 daystypical year, 32°F
  • Hardiness zone5bcalculated*

The year at a glance

Frost season at Kane, PASpring: a frost after May 6 in 9 years out of 10, after May 24 in half of the years, after June 7 in 1 year out of 10. Fall: the first frost comes before September 11 in 1 year out of 10, before September 28 in half of the years, before October 10 in 9 years out of 10. Typical frost-free season: 126 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 24First frost ~Sep 28Frost season at Kane, PASpring: a frost after May 6 in 9 years out of 10, after May 24 in half of the years, after June 7 in 1 year out of 10. Fall: the first frost comes before September 11 in 1 year out of 10, before September 28 in half of the years, before October 10 in 9 years out of 10. Typical frost-free season: 126 days.JFMAMJJASONDLast frost ~May 24First frost ~Sep 28
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 26 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)June 7September 11
50% (typical)May 24September 28
90% (likely)May 6October 10
Frost-free season (32°F, 50% chance)
126 days
Hard frost (28°F), last in spring, 50% chance after
May 11
Hard frost (28°F), first in fall, 50% chance before
October 8

The last 15 years (2006–2020 normals)

Typical last frost May 21 (3 days earlier than the 30-year normal), typical first fall frost October 1 (3 days later). Frost-free season 133 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 Kane: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 7, 20% June 1, 30% May 30, 40% May 27, 50% May 24, 60% May 21, 70% May 18, 80% May 13, 90% May 6. Observed last spring frost in recent years: 2021 May 18, 2022 May 18, 2023 May 26, 2024 June 1.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jun 7May 24May 62021: May 182022: May 182023: May 262024: June 1Fall at Kane: chance of a frost before this dateFall, chance of a frost before the date: 10% September 11, 20% September 17, 30% September 21, 40% September 24, 50% September 28, 60% September 30, 70% October 2, 80% October 5, 90% October 10. Observed first fall frost in recent years: 2021 October 19, 2023 October 20, 2024 October 8.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Sep 11Sep 28Oct 102021: October 192023: October 202024: October 8
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 18October 19
2022May 18incomplete record
2023May 26October 20
2024June 1October 8
2025incomplete recordno data
2026no dataseason not over yet

What these dates mean

June 7 is the cautious spring date, when the chance of a later light frost is only 10 % and a gardener can set out tender crops with minimal risk. May 24 is the 50 % light-frost date; there is a 50 % chance of a light frost later than this date. May 11 marks the 50 % hard-frost date, a colder threshold that can damage vegetation more severely than a 32 °F frost.

September 11 is the cautious fall date, when the chance of an earlier light frost is just 10 % and harvesting tender crops can be finished safely. September 28 is the 50 % light-frost date; there is a 50 % chance of a light frost earlier than this date. October 8 is the 50 % hard-frost date, and hard frost matters more because the 28 °F temperature can cause far greater plant injury than 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 June 7" 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 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 Kane, PANumbered nearest stations: 1 — Bradford, PA — 12 mi; 2 — Bradford 4 SW Research 5, PA — 16 mi; 3 — Ridgway, PA — 18 mi; 4 — Warren, PA — 21 mi; 5 — near Allegany, NY — 29 mi.NY25 mi · 40 km1. Bradford, PA — 12 mi12. Bradford 4 SW Research 5, PA — 16 mi23. Ridgway, PA — 18 mi34. Warren, PA — 21 mi45. near Allegany, NY — 29 mi5
  1. Bradford, PA 12 mi (20 km)
  2. Bradford 4 SW Research 5, PA 16 mi (26 km)
  3. Ridgway, PA 18 mi (29 km)
  4. Warren, PA 21 mi (34 km)
  5. near Allegany, NY 29 mi (47 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: 41.6767, -78.8036.