U.S. Frost Dates by Weather Station

NOAA station USC00161232 · Louisiana

Frost Dates for Boyce, LA

NOAA weather station Boyce 3 WNW (USC00161232), Louisiana · elevation 110 ft (34 m) · hardiness zone 9a*

  • Lower-risk planting dateafter March 19only 1 spring in 10 still has a frost later
  • Typical last frostMarch 250% chance of a frost after it
  • Typical first fall frostNovember 2750% chance of a frost before it
  • Frost-free season271 daystypical year, 32°F
  • Hardiness zone9acalculated*

The year at a glance

Frost season at Boyce, LASpring: a frost after February 1 in 9 years out of 10, after March 2 in half of the years, after March 19 in 1 year out of 10. Fall: the first frost comes before November 7 in 1 year out of 10, before November 27 in half of the years, before December 17 in 9 years out of 10. Typical frost-free season: 271 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 2First frost ~Nov 27Frost season at Boyce, LASpring: a frost after February 1 in 9 years out of 10, after March 2 in half of the years, after March 19 in 1 year out of 10. Fall: the first frost comes before November 7 in 1 year out of 10, before November 27 in half of the years, before December 17 in 9 years out of 10. Typical frost-free season: 271 days.JFMAMJJASONDLast frost ~Mar 2First frost ~Nov 27
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)March 19November 7
50% (typical)March 2November 27
90% (likely)February 1December 17
Frost-free season (32°F, 50% chance)
271 days
Hard frost (28°F), last in spring, 50% chance after
February 11
Hard frost (28°F), first in fall, 50% chance before
December 14

The last 15 years (2006–2020 normals)

Typical last frost March 2 (same as the 30-year normal), typical first fall frost November 26 (1 day earlier). Frost-free season 270 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 Boyce: chance of a frost after this dateSpring, chance of a frost after the date: 10% March 19, 20% March 14, 30% March 9, 40% March 5, 50% March 2, 60% February 26, 70% February 22, 80% February 14, 90% February 1. Observed last spring frost in recent years: 2021 February 21, 2022 March 13, 2023 March 21, 2024 February 20, 2025 February 23, 2026 March 17.Spring: last frostChance of a frost after this date10%50%90%Feb 1Mar 1Apr 1Mar 19Mar 2Feb 12021: February 212022: March 132023: March 212024: February 202025: February 232026: March 17Fall at Boyce: chance of a frost before this dateFall, chance of a frost before the date: 10% November 7, 20% November 13, 30% November 18, 40% November 23, 50% November 27, 60% December 1, 70% December 4, 80% December 9, 90% December 17. Observed first fall frost in recent years: 2022 November 13, 2023 November 2, 2024 November 30, 2025 December 2.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Nov 7Nov 27Dec 172022: November 132023: November 22024: November 302025: December 2
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
2021February 21incomplete record
2022March 13November 13
2023March 21November 2
2024February 20November 30
2025February 23December 2
2026March 17season not over yet

What these dates mean

November 7, the cautious fall date, marks the end of the season for finishing the harvest in Boyce. This date carries a 10% chance that a light frost has arrived, so tender crops should be harvested by then. In spring, the cautious date for setting out tender crops is March 19, when only a 10% chance of a later light frost remains. The 50% light-frost dates are March 2 in spring and November 27 in fall; at each of these dates there is an even chance of a frost occurring later (spring) or earlier (fall).

The median hard-frost dates are February 11 for spring and December 14 for fall. A hard frost at 28 °F can damage tender plants more severely than a light frost at 32 °F, so gardeners should regard these dates as additional risk markers.

How to read the probabilities

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

  • Spring: "10% after March 19" 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 November 7" 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 Boyce, LANumbered nearest stations: 1 — Alexandria, LA — 16 mi; 2 — Leesville, LA — 35 mi; 3 — Jena, LA — 40 mi; 4 — Bunkie, LA — 44 mi; 5 — near Jonesville, LA — 51 mi.25 mi · 40 km1. Alexandria, LA — 16 mi12. Leesville, LA — 35 mi23. Jena, LA — 40 mi34. Bunkie, LA — 44 mi45. near Jonesville, LA — 51 mi5
  1. Alexandria, LA 16 mi (26 km)
  2. Leesville, LA 35 mi (57 km)
  3. Jena, LA 40 mi (64 km)
  4. Bunkie, LA 44 mi (70 km)
  5. near Jonesville, LA 51 mi (82 km)

Sources

* Hardiness zone 9a: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 31.3944, -92.7164.