U.S. Frost Dates by Weather Station

NOAA station USC00362721 · Pennsylvania

Frost Dates for Everett, PA

NOAA weather station Everett (USC00362721), Pennsylvania · elevation 1000 ft (305 m) · hardiness zone 6b*

  • Lower-risk planting dateafter May 16only 1 spring in 10 still has a frost later
  • Typical last frostApril 2750% chance of a frost after it
  • Typical first fall frostOctober 1750% chance of a frost before it
  • Frost-free season170 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Everett, PASpring: a frost after April 12 in 9 years out of 10, after April 27 in half of the years, after May 16 in 1 year out of 10. Fall: the first frost comes before October 3 in 1 year out of 10, before October 17 in half of the years, before November 1 in 9 years out of 10. Typical frost-free season: 170 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 27First frost ~Oct 17Frost season at Everett, PASpring: a frost after April 12 in 9 years out of 10, after April 27 in half of the years, after May 16 in 1 year out of 10. Fall: the first frost comes before October 3 in 1 year out of 10, before October 17 in half of the years, before November 1 in 9 years out of 10. Typical frost-free season: 170 days.JFMAMJJASONDLast frost ~Apr 27First frost ~Oct 17
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 16October 3
50% (typical)April 27October 17
90% (likely)April 12November 1
Frost-free season (32°F, 50% chance)
170 days
Hard frost (28°F), last in spring, 50% chance after
April 12
Hard frost (28°F), first in fall, 50% chance before
October 29

The last 15 years (2006–2020 normals)

Typical last frost April 25 (2 days earlier than the 30-year normal), typical first fall frost October 23 (6 days later). Frost-free season 177 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 Everett: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 16, 20% May 9, 30% May 4, 40% April 30, 50% April 27, 60% April 23, 70% April 20, 80% April 17, 90% April 12.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1May 16Apr 27Apr 12Fall at Everett: chance of a frost before this dateFall, chance of a frost before the date: 10% October 3, 20% October 7, 30% October 11, 40% October 14, 50% October 17, 60% October 20, 70% October 22, 80% October 26, 90% November 1.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Oct 3Oct 17Nov 1
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.

What these dates mean

May 16 is the cautious spring light-frost date for Everett; with only a 10 % chance of a frost after that day a gardener can reasonably set out tender crops. The earlier date of April 12 carries a 90 % chance and is a gamble, while the median April 27 marks the 50 % point where a light frost is equally likely to occur later.

October 3 serves as the cautious fall light-frost date, giving a 10 % chance of a frost earlier than that day and allowing harvest of tender crops to be finished. The 50 % fall median is October 17, a point of even odds, and the hard-frost 50 % dates are April 12 in spring and October 29 in fall, based on 27 years of record.

A hard frost at 28 °F can damage plants that survive a light frost at 32 °F, so the hard-frost dates are especially important for protecting vulnerable crops.

How to read the probabilities

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

  • Spring: "10% after May 16" 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 3" 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 Everett, PANumbered nearest stations: 1 — near Martinsburg, PA — 20 mi; 2 — Cumberland, MD — 33 mi; 3 — Altoona, PA — 34 mi; 4 — Ebensburg, PA — 37 mi; 5 — Chambersburg, PA — 39 mi.MDWV25 mi · 40 km1. near Martinsburg, PA — 20 mi12. Cumberland, MD — 33 mi23. Altoona, PA — 34 mi34. Ebensburg, PA — 37 mi45. Chambersburg, PA — 39 mi5
  1. near Martinsburg, PA 20 mi (32 km)
  2. Cumberland, MD 33 mi (53 km)
  3. Altoona, PA 34 mi (54 km)
  4. Ebensburg, PA 37 mi (59 km)
  5. Chambersburg, PA 39 mi (62 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: 40.0136, -78.3653.