U.S. Frost Dates by Weather Station

NOAA station USC00167738 · Louisiana

Frost Dates near Bossier City, LA

NOAA weather station Red River Research Station (USC00167738), Louisiana · elevation 155 ft (47 m) · hardiness zone 8b*

Bossier City is the nearest town to the station (8.5 mi away) in GeoNames (CC BY 4.0). The dates below are measured at the station, not in the town itself.

  • Lower-risk planting dateafter March 26only 1 spring in 10 still has a frost later
  • Typical last frostMarch 650% chance of a frost after it
  • Typical first fall frostNovember 1850% chance of a frost before it
  • Frost-free season256 daystypical year, 32°F
  • Hardiness zone8bcalculated*

The year at a glance

Frost season near Bossier City, LASpring: a frost after February 15 in 9 years out of 10, after March 6 in half of the years, after March 26 in 1 year out of 10. Fall: the first frost comes before November 1 in 1 year out of 10, before November 18 in half of the years, before December 6 in 9 years out of 10. Typical frost-free season: 256 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 6First frost ~Nov 18Frost season near Bossier City, LASpring: a frost after February 15 in 9 years out of 10, after March 6 in half of the years, after March 26 in 1 year out of 10. Fall: the first frost comes before November 1 in 1 year out of 10, before November 18 in half of the years, before December 6 in 9 years out of 10. Typical frost-free season: 256 days.JFMAMJJASONDLast frost ~Mar 6First frost ~Nov 18
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 28 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)March 26November 1
50% (typical)March 6November 18
90% (likely)February 15December 6
Frost-free season (32°F, 50% chance)
256 days
Hard frost (28°F), last in spring, 50% chance after
February 22
Hard frost (28°F), first in fall, 50% chance before
December 1

The last 15 years (2006–2020 normals)

Typical last frost March 4 (2 days earlier than the 30-year normal), typical first fall frost November 16 (2 days earlier). Frost-free season 259 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 near Bossier City: chance of a frost after this dateSpring, chance of a frost after the date: 10% March 26, 20% March 19, 30% March 14, 40% March 10, 50% March 6, 60% March 2, 70% February 27, 80% February 22, 90% February 15. Observed last spring frost in recent years: 2022 March 13, 2023 March 21, 2024 February 19, 2025 March 21, 2026 March 18.Spring: last frostChance of a frost after this date10%50%90%Feb 1Mar 1Apr 1Mar 26Mar 6Feb 152022: March 132023: March 212024: February 192025: March 212026: March 18Fall near Bossier City: chance of a frost before this dateFall, chance of a frost before the date: 10% November 1, 20% November 6, 30% November 10, 40% November 14, 50% November 18, 60% November 21, 70% November 27, 80% December 1, 90% December 6. Observed first fall frost in recent years: 2021 November 19, 2022 October 19, 2023 November 1, 2024 November 30, 2025 November 10.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Nov 1Nov 18Dec 62021: November 192022: October 192023: November 12024: November 302025: November 10
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
2021incomplete recordNovember 19
2022March 13October 19
2023March 21November 1
2024February 19November 30
2025March 21November 10
2026March 18season not over yet

What these dates mean

March 26 is the cautious spring date for the Bossier City area; with only a 10 % chance of a light frost later, it marks the point when a gardener can begin setting out tender crops with minimal risk. The early-spring gamble of February 15 carries a 90 % chance of frost, while the median March 6 represents an even 50 % chance and is not itself a frost date.

In autumn the cautious date switches to November 1, when there is only a 10 % chance that a light frost has arrived, allowing the final harvest of tender crops before frost becomes likely. The median November 18 carries a 50 % chance of frost earlier, and the hard-frost median dates are February 22 in spring and December 1 in fall; a hard frost at 28 °F can damage plants that survive a light frost at 32 °F, making it the more critical threshold.

How to read the probabilities

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

  • Spring: "10% after March 26" 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 1" 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 Bossier City, LANumbered nearest stations: 1 — Shreveport, LA — 12 mi; 2 — Minden, LA — 24 mi; 3 — Marshall, TX — 41 mi; 4 — Bienville, LA — 41 mi; 5 — Homer, LA — 43 mi.TXAR25 mi · 40 km1. Shreveport, LA — 12 mi12. Minden, LA — 24 mi23. Marshall, TX — 41 mi34. Bienville, LA — 41 mi45. Homer, LA — 43 mi5
  1. Shreveport, LA 12 mi (19 km)
  2. Minden, LA 24 mi (38 km)
  3. Marshall, TX 41 mi (65 km)
  4. Bienville, LA 41 mi (65 km)
  5. Homer, LA 43 mi (69 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: 32.4219, -93.6381.