U.S. Frost Dates by Weather Station

NOAA station USC00015121 · Alabama

Frost Dates for Marion Junction, AL

NOAA weather station Marion Junction 2 NE (USC00015121), Alabama · elevation 200 ft (61 m) · hardiness zone 8b*

  • Lower-risk planting dateafter April 7only 1 spring in 10 still has a frost later
  • Typical last frostMarch 1950% chance of a frost after it
  • Typical first fall frostNovember 950% chance of a frost before it
  • Frost-free season238 daystypical year, 32°F
  • Hardiness zone8bcalculated*

The year at a glance

Frost season at Marion Junction, ALSpring: a frost after February 28 in 9 years out of 10, after March 19 in half of the years, after April 7 in 1 year out of 10. Fall: the first frost comes before October 27 in 1 year out of 10, before November 9 in half of the years, before November 28 in 9 years out of 10. Typical frost-free season: 238 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 19First frost ~Nov 9Frost season at Marion Junction, ALSpring: a frost after February 28 in 9 years out of 10, after March 19 in half of the years, after April 7 in 1 year out of 10. Fall: the first frost comes before October 27 in 1 year out of 10, before November 9 in half of the years, before November 28 in 9 years out of 10. Typical frost-free season: 238 days.JFMAMJJASONDLast frost ~Mar 19First frost ~Nov 9
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 28 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 7October 27
50% (typical)March 19November 9
90% (likely)February 28November 28
Frost-free season (32°F, 50% chance)
238 days
Hard frost (28°F), last in spring, 50% chance after
March 3
Hard frost (28°F), first in fall, 50% chance before
November 20

The last 15 years (2006–2020 normals)

Typical last frost March 14 (5 days earlier than the 30-year normal), typical first fall frost November 7 (2 days earlier). Frost-free season 237 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 Marion Junction: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 7, 20% April 2, 30% March 28, 40% March 24, 50% March 19, 60% March 15, 70% March 11, 80% March 4, 90% February 28. Observed last spring frost in recent years: 2021 April 3, 2022 March 14, 2023 March 22, 2024 March 19, 2025 March 22, 2026 March 17.Spring: last frostChance of a frost after this date10%50%90%Mar 1Apr 1Apr 7Mar 19Feb 282021: April 32022: March 142023: March 222024: March 192025: March 222026: March 17Fall at Marion Junction: chance of a frost before this dateFall, chance of a frost before the date: 10% October 27, 20% November 1, 30% November 3, 40% November 5, 50% November 9, 60% November 12, 70% November 15, 80% November 19, 90% November 28. Observed first fall frost in recent years: 2021 November 14, 2022 October 19, 2023 November 2, 2024 November 25, 2025 November 9.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Oct 27Nov 9Nov 282021: November 142022: October 192023: November 22024: November 252025: November 9
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 14
2022March 14October 19
2023March 22November 2
2024March 19November 25
2025March 22November 9
2026March 17season not over yet

What these dates mean

Setting out tender crops on the early spring date, February 28, risks a 90% chance of a frost later in Marion Junction and should be treated as a gamble. The cautious spring date for tender crops is April 7, when only a 10% chance of a frost later remains.

The 50% light-frost date in spring, March 19, means a frost is equally likely to occur after that day, while the 50% light-frost date in fall, November 9, means a frost is equally likely to have occurred before that day. The cautious fall date for finishing tender crops is October 27, which carries just a 10% chance that a frost has arrived earlier.

Hard-frost dates—March 3 in spring and November 20 in fall—are noted because a 28°F frost can damage plants more severely than the 32°F light frost. These dates, together with the 238-day span between the two 32°F 50% dates, summarize the frost risk profile for Marion Junction over the 28-year record.

How to read the probabilities

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

  • Spring: "10% after April 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 October 27" 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 Marion Junction, ALNumbered nearest stations: 1 — Clanton, AL — 44 mi; 2 — Montgomery, AL — 50 mi; 3 — Gainesville Lock, AL — 58 mi; 4 — Greenville, AL — 60 mi; 5 — Bessemer, AL — 65 mi.ALMS50 mi · 80 km1. Clanton, AL — 44 mi12. Montgomery, AL — 50 mi23. Gainesville Lock, AL — 58 mi34. Greenville, AL — 60 mi45. Bessemer, AL — 65 mi5
  1. Clanton, AL 44 mi (70 km)
  2. Montgomery, AL 50 mi (80 km)
  3. Gainesville Lock, AL 58 mi (94 km)
  4. Greenville, AL 60 mi (96 km)
  5. Bessemer, AL 65 mi (105 km)

Sources

* Hardiness zone 8b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 32.4714, -87.2314.