U.S. Frost Dates by Weather Station

NOAA station USC00018998 · Alabama

Frost Dates for Winfield, AL

NOAA weather station Winfield 2 SW (USC00018998), Alabama · elevation 520 ft (159 m) · hardiness zone 7b*

  • Lower-risk planting dateafter April 22only 1 spring in 10 still has a frost later
  • Typical last frostApril 450% chance of a frost after it
  • Typical first fall frostNovember 150% chance of a frost before it
  • Frost-free season211 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Winfield, ALSpring: a frost after March 14 in 9 years out of 10, after April 4 in half of the years, after April 22 in 1 year out of 10. Fall: the first frost comes before October 19 in 1 year out of 10, before November 1 in half of the years, before November 19 in 9 years out of 10. Typical frost-free season: 211 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 4First frost ~Nov 1Frost season at Winfield, ALSpring: a frost after March 14 in 9 years out of 10, after April 4 in half of the years, after April 22 in 1 year out of 10. Fall: the first frost comes before October 19 in 1 year out of 10, before November 1 in half of the years, before November 19 in 9 years out of 10. Typical frost-free season: 211 days.JFMAMJJASONDLast frost ~Apr 4First 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 22October 19
50% (typical)April 4November 1
90% (likely)March 14November 19
Frost-free season (32°F, 50% chance)
211 days
Hard frost (28°F), last in spring, 50% chance after
March 20
Hard frost (28°F), first in fall, 50% chance before
November 11

The last 15 years (2006–2020 normals)

Typical last frost April 1 (3 days earlier than the 30-year normal), typical first fall frost November 4 (3 days later). Frost-free season 218 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 Winfield: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 22, 20% April 15, 30% April 10, 40% April 7, 50% April 4, 60% March 31, 70% March 28, 80% March 21, 90% March 14. Observed last spring frost in recent years: 2021 April 3, 2022 April 10, 2023 March 22, 2024 March 20, 2025 April 8.Spring: last frostChance of a frost after this date10%50%90%Mar 1Apr 1May 1Apr 22Apr 4Mar 142021: April 32022: April 102023: March 222024: March 202025: April 8Fall at Winfield: chance of a frost before this dateFall, chance of a frost before the date: 10% October 19, 20% October 24, 30% October 27, 40% October 30, 50% November 1, 60% November 4, 70% November 7, 80% November 11, 90% November 19. Observed first fall frost in recent years: 2021 November 7, 2022 October 18, 2023 November 1, 2024 November 21, 2025 November 3.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Oct 19Nov 1Nov 192021: November 72022: October 182023: November 12024: November 212025: November 3
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 3November 7
2022April 10October 18
2023March 22November 1
2024March 20November 21
2025April 8November 3
2026incomplete recordseason not over yet

What these dates mean

October 19 is the cautious fall date for finishing the harvest in Winfield, carrying a 10 % chance that a light frost has already arrived; planting or harvesting after this point faces a much higher risk, whereas November 19 marks a 90 % chance that a light frost has already begun.

April 22 serves as the cautious spring date for setting out tender crops, with only a 10 % chance of a light frost occurring later. The median 50 % date of April 4 indicates an even odds of a frost later, while March 14 carries a 90 % chance and is a gamble for early planting.

A hard frost at 28 °F, represented by the median dates of March 20 and November 11, can injure plants that survive a 32 °F light frost, making it a more serious concern.

How to read the probabilities

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

  • Spring: "10% after April 22" 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 19" 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 Winfield, ALNumbered nearest stations: 1 — Hamilton, AL — 15 mi; 2 — Haleyville, AL — 25 mi; 3 — Verona, MS — 53 mi; 4 — Tupelo, MS — 58 mi; 5 — Muscle Shoals, AL — 59 mi.TN25 mi · 40 km1. Hamilton, AL — 15 mi12. Haleyville, AL — 25 mi23. Verona, MS — 53 mi34. Tupelo, MS — 58 mi45. Muscle Shoals, AL — 59 mi5
  1. Hamilton, AL 15 mi (25 km)
  2. Haleyville, AL 25 mi (41 km)
  3. Verona, MS 53 mi (86 km)
  4. Tupelo, MS 58 mi (94 km)
  5. Muscle Shoals, AL 59 mi (95 km)

Sources

* Hardiness zone 7b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 33.9108, -87.8469.