U.S. Frost Dates by Weather Station

NOAA station USC00366238 · Pennsylvania

Frost Dates for New Holland, PA

NOAA weather station New Holland 2 SE (USC00366238), Pennsylvania · elevation 605 ft (184 m) · hardiness zone 7a*

  • Lower-risk planting dateafter April 30only 1 spring in 10 still has a frost later
  • Typical last frostApril 1450% chance of a frost after it
  • Typical first fall frostNovember 150% chance of a frost before it
  • Frost-free season198 daystypical year, 32°F
  • Hardiness zone7acalculated*

The year at a glance

Frost season at New Holland, PASpring: a frost after April 1 in 9 years out of 10, after April 14 in half of the years, after April 30 in 1 year out of 10. Fall: the first frost comes before October 17 in 1 year out of 10, before November 1 in half of the years, before November 13 in 9 years out of 10. Typical frost-free season: 198 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 14First frost ~Nov 1Frost season at New Holland, PASpring: a frost after April 1 in 9 years out of 10, after April 14 in half of the years, after April 30 in 1 year out of 10. Fall: the first frost comes before October 17 in 1 year out of 10, before November 1 in half of the years, before November 13 in 9 years out of 10. Typical frost-free season: 198 days.JFMAMJJASONDLast frost ~Apr 14First frost ~Nov 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 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 30October 17
50% (typical)April 14November 1
90% (likely)April 1November 13
Frost-free season (32°F, 50% chance)
198 days
Hard frost (28°F), last in spring, 50% chance after
April 3
Hard frost (28°F), first in fall, 50% chance before
November 11

The last 15 years (2006–2020 normals)

Typical last frost April 14 (same as the 30-year normal), typical first fall frost November 2 (1 day later). Frost-free season 200 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 New Holland: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 30, 20% April 24, 30% April 20, 40% April 17, 50% April 14, 60% April 11, 70% April 8, 80% April 5, 90% April 1. Observed last spring frost in recent years: 2021 April 23, 2022 April 30, 2023 April 25, 2024 April 23, 2025 April 17, 2026 April 21.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 30Apr 14Apr 12021: April 232022: April 302023: April 252024: April 232025: April 172026: April 21Fall at New Holland: chance of a frost before this dateFall, chance of a frost before the date: 10% October 17, 20% October 23, 30% October 26, 40% October 29, 50% November 1, 60% November 3, 70% November 5, 80% November 8, 90% November 13. Observed first fall frost in recent years: 2021 November 3, 2022 October 9, 2023 October 24, 2024 October 17, 2025 October 17.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 17Nov 1Nov 132021: November 32022: October 92023: October 242024: October 172025: October 17
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
2021April 23November 3
2022April 30October 9
2023April 25October 24
2024April 23October 17
2025April 17October 17
2026April 21season not over yet

What these dates mean

The 198 days between the 32°F 50% dates of April 14 and November 1 define the span in New Holland during which a light frost is less likely than not. Within that window most garden activities can be scheduled with moderate risk.

For light frosts, the median spring date is April 14, indicating an even chance of a frost occurring later, and the median fall date is November 1, indicating an even chance of a frost occurring earlier. A cautious spring plan uses the April 30 date, which carries only a 10 % chance of a frost later, while a cautious fall plan uses the October 17 date, which carries only a 10 % chance of a frost earlier. Planting tender crops around these dates reduces exposure to the higher-risk periods.

Hard frosts at 28 °F, with 50% dates of April 3 and November 11, are more damaging because they occur at temperatures well below the threshold that merely chills foliage.

How to read the probabilities

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

  • Spring: "10% after April 30" 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 17" 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 New Holland, PANumbered nearest stations: 1 — near Lancaster, PA — 11 mi; 2 — Landisville, PA — 19 mi; 3 — near Oxford, PA — 19 mi; 4 — near Whitfield, PA — 21 mi; 5 — Lebanon, PA — 27 mi.NJMDDE25 mi · 40 km1. near Lancaster, PA — 11 mi12. Landisville, PA — 19 mi23. near Oxford, PA — 19 mi34. near Whitfield, PA — 21 mi45. Lebanon, PA — 27 mi5
  1. near Lancaster, PA 11 mi (17 km)
  2. Landisville, PA 19 mi (31 km)
  3. near Oxford, PA 19 mi (31 km)
  4. near Whitfield, PA 21 mi (34 km)
  5. Lebanon, PA 27 mi (44 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: 40.0753, -76.0714.