U.S. Frost Dates by Weather Station

NOAA station USW00013942 · Louisiana

Frost Dates for Monroe, LA

NOAA weather station Monroe Regional Airport (USW00013942), Louisiana · elevation 79 ft (24 m) · hardiness zone 8b*

  • Lower-risk planting dateafter March 25only 1 spring in 10 still has a frost later
  • Typical last frostMarch 850% chance of a frost after it
  • Typical first fall frostNovember 1550% chance of a frost before it
  • Frost-free season253 daystypical year, 32°F
  • Hardiness zone8bcalculated*

The year at a glance

Frost season at Monroe, LASpring: a frost after February 16 in 9 years out of 10, after March 8 in half of the years, after March 25 in 1 year out of 10. Fall: the first frost comes before November 1 in 1 year out of 10, before November 15 in half of the years, before December 3 in 9 years out of 10. Typical frost-free season: 253 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 8First frost ~Nov 15Frost season at Monroe, LASpring: a frost after February 16 in 9 years out of 10, after March 8 in half of the years, after March 25 in 1 year out of 10. Fall: the first frost comes before November 1 in 1 year out of 10, before November 15 in half of the years, before December 3 in 9 years out of 10. Typical frost-free season: 253 days.JFMAMJJASONDLast frost ~Mar 8First frost ~Nov 15
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)March 25November 1
50% (typical)March 8November 15
90% (likely)February 16December 3
Frost-free season (32°F, 50% chance)
253 days
Hard frost (28°F), last in spring, 50% chance after
February 23
Hard frost (28°F), first in fall, 50% chance before
November 29

The last 15 years (2006–2020 normals)

Typical last frost March 6 (2 days earlier than the 30-year normal), typical first fall frost November 16 (1 day later). Frost-free season 255 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 Monroe: chance of a frost after this dateSpring, chance of a frost after the date: 10% March 25, 20% March 19, 30% March 14, 40% March 11, 50% March 8, 60% March 3, 70% February 28, 80% February 24, 90% February 16. Observed last spring frost in recent years: 2021 March 3, 2022 March 13, 2023 March 20, 2024 February 19, 2025 February 21, 2026 March 17.Spring: last frostChance of a frost after this date10%50%90%Mar 1Apr 1Mar 25Mar 8Feb 162021: March 32022: March 132023: March 202024: February 192025: February 212026: March 17Fall at Monroe: chance of a frost before this dateFall, chance of a frost before the date: 10% November 1, 20% November 4, 30% November 8, 40% November 12, 50% November 15, 60% November 18, 70% November 23, 80% November 27, 90% December 3. Observed first fall frost in recent years: 2021 November 20, 2022 October 19, 2023 November 1, 2024 November 30, 2025 November 11.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Nov 1Nov 15Dec 32021: November 202022: October 192023: November 12024: November 302025: November 11
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
2021March 3November 20
2022March 13October 19
2023March 20November 1
2024February 19November 30
2025February 21November 11
2026March 17season not over yet

What these dates mean

March 25 is the cautious spring date; with only a 10% chance of a light frost later, it lets gardeners set out tender crops. The 50% date for light frost is March 8, meaning a frost is equally likely to occur later, while the 50% hard-frost date is February 23, marking an even chance of a 28 °F event. For fall, November 1 is the cautious date, carrying a 10% chance that a light frost has arrived earlier, so gardeners can finish harvesting tender crops. The 50% light-frost date is November 15, where a frost is equally likely to have arrived earlier, and the 50% hard-frost date is November 29. A hard frost matters more than a light frost because the 28 °F temperature can cause far greater plant injury than the milder 32 °F. These probabilities are drawn from 27 years of NOAA records for Monroe.

How to read the probabilities

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

  • Spring: "10% after March 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 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 Monroe, LANumbered nearest stations: 1 — Winnsboro, LA — 35 mi; 2 — Crossett, AR — 41 mi; 3 — Bienville, LA — 54 mi; 4 — Lake Providence, LA — 54 mi; 5 — Jena, LA — 58 mi.LAMSAR25 mi · 40 km1. Winnsboro, LA — 35 mi12. Crossett, AR — 41 mi23. Bienville, LA — 54 mi34. Lake Providence, LA — 54 mi45. Jena, LA — 58 mi5
  1. Winnsboro, LA 35 mi (56 km)
  2. Crossett, AR 41 mi (67 km)
  3. Bienville, LA 54 mi (86 km)
  4. Lake Providence, LA 54 mi (87 km)
  5. Jena, LA 58 mi (93 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: 32.5156, -92.0406.