U.S. Frost Dates by Weather Station

NOAA station USW00014750 · New York

Frost Dates for Glens Falls, NY

NOAA weather station Glens Falls Airport (USW00014750), New York · elevation 321 ft (98 m) · hardiness zone 5a*

  • Lower-risk planting dateafter May 25only 1 spring in 10 still has a frost later
  • Typical last frostMay 950% chance of a frost after it
  • Typical first fall frostSeptember 3050% chance of a frost before it
  • Frost-free season143 daystypical year, 32°F
  • Hardiness zone5acalculated*

The year at a glance

Frost season at Glens Falls, NYSpring: a frost after April 27 in 9 years out of 10, after May 9 in half of the years, after May 25 in 1 year out of 10. Fall: the first frost comes before September 18 in 1 year out of 10, before September 30 in half of the years, before October 13 in 9 years out of 10. Typical frost-free season: 143 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 9First frost ~Sep 30Frost season at Glens Falls, NYSpring: a frost after April 27 in 9 years out of 10, after May 9 in half of the years, after May 25 in 1 year out of 10. Fall: the first frost comes before September 18 in 1 year out of 10, before September 30 in half of the years, before October 13 in 9 years out of 10. Typical frost-free season: 143 days.JFMAMJJASONDLast frost ~May 9First frost ~Sep 30
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.Today

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 25September 18
50% (typical)May 9September 30
90% (likely)April 27October 13
Frost-free season (32°F, 50% chance)
143 days
Hard frost (28°F), last in spring, 50% chance after
April 28
Hard frost (28°F), first in fall, 50% chance before
October 9

The last 15 years (2006–2020 normals)

Typical last frost May 7 (2 days earlier than the 30-year normal), typical first fall frost October 2 (2 days later). Frost-free season 145 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 Glens Falls: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 25, 20% May 19, 30% May 15, 40% May 11, 50% May 9, 60% May 5, 70% May 2, 80% April 30, 90% April 27. Observed last spring frost in recent years: 2021 April 27, 2022 May 10, 2023 May 26, 2024 April 27, 2025 April 28, 2026 May 11.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1May 25May 9Apr 272021: April 272022: May 102023: May 262024: April 272025: April 282026: May 11Fall at Glens Falls: chance of a frost before this dateFall, chance of a frost before the date: 10% September 18, 20% September 22, 30% September 25, 40% September 28, 50% September 30, 60% October 2, 70% October 4, 80% October 7, 90% October 13. Observed first fall frost in recent years: 2021 October 23, 2022 September 30, 2023 October 24, 2024 October 9, 2025 September 21.Fall: first frostChance of a frost before this date10%50%90%Oct 1Sep 18Sep 30Oct 132021: October 232022: September 302023: October 242024: October 92025: September 21
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 27October 23
2022May 10September 30
2023May 26October 24
2024April 27October 9
2025April 28September 21
2026May 11season not over yet

What these dates mean

Setting out tender crops on April 27 in Glens Falls carries a 90% chance that a light frost will occur later, making it a gamble for growers.

The 50% light-frost dates are May 9 and September 30; each represents an even-odds point where a light frost is equally likely to occur on either side of the date. Likewise, the 50% hard-frost dates are April 28 and October 9, each marking the median moment of a deeper 28 °F freeze.

The cautious spring date for tender crops is May 25, when only a 10% chance of a later light frost remains, and the cautious fall date is September 18, with a 10% chance that a light frost has arrived earlier. A hard frost at 28 °F matters more than a 32 °F light frost because the lower temperature can injure plants that would otherwise survive a milder freeze.

How to read the probabilities

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

  • Spring: "10% after May 25" 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 18" 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 Glens Falls, NYNumbered nearest stations: 1 — Saratoga Springs, NY — 24 mi; 2 — Rutland, VT — 37 mi; 3 — near Troy, NY — 42 mi; 4 — Albany, NY — 43 mi; 5 — Indian Lake 2 SW, NY — 43 mi.NYNH25 mi · 40 km1. Saratoga Springs, NY — 24 mi12. Rutland, VT — 37 mi23. near Troy, NY — 42 mi34. Albany, NY — 43 mi45. Indian Lake 2 SW, NY — 43 mi5
  1. Saratoga Springs, NY 24 mi (38 km)
  2. Rutland, VT 37 mi (60 km)
  3. near Troy, NY 42 mi (67 km)
  4. Albany, NY 43 mi (69 km)
  5. Indian Lake 2 SW, NY 43 mi (70 km)

Sources

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

Station coordinates: 43.35, -73.6167.