U.S. Frost Dates by Weather Station

NOAA station USC00418743 · Texas

Frost Dates for Sulphur Springs, TX

NOAA weather station Sulphur Springs (USC00418743), Texas · elevation 495 ft (151 m) · hardiness zone 8b*

  • Lower-risk planting dateafter April 4only 1 spring in 10 still has a frost later
  • Typical last frostMarch 1550% chance of a frost after it
  • Typical first fall frostNovember 1450% chance of a frost before it
  • Frost-free season245 daystypical year, 32°F
  • Hardiness zone8bcalculated*

The year at a glance

Frost season at Sulphur Springs, TXSpring: a frost after February 25 in 9 years out of 10, after March 15 in half of the years, after April 4 in 1 year out of 10. Fall: the first frost comes before October 29 in 1 year out of 10, before November 14 in half of the years, before December 3 in 9 years out of 10. Typical frost-free season: 245 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 15First frost ~Nov 14Frost season at Sulphur Springs, TXSpring: a frost after February 25 in 9 years out of 10, after March 15 in half of the years, after April 4 in 1 year out of 10. Fall: the first frost comes before October 29 in 1 year out of 10, before November 14 in half of the years, before December 3 in 9 years out of 10. Typical frost-free season: 245 days.JFMAMJJASONDLast frost ~Mar 15First frost ~Nov 14
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 25 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 4October 29
50% (typical)March 15November 14
90% (likely)February 25December 3
Frost-free season (32°F, 50% chance)
245 days
Hard frost (28°F), last in spring, 50% chance after
March 2
Hard frost (28°F), first in fall, 50% chance before
November 28

The last 15 years (2006–2020 normals)

Typical last frost March 14 (1 day earlier than the 30-year normal), typical first fall frost November 15 (1 day later). Frost-free season 246 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 Sulphur Springs: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 4, 20% March 29, 30% March 23, 40% March 18, 50% March 15, 60% March 11, 70% March 6, 80% March 2, 90% February 25. Observed last spring frost in recent years: 2021 February 22, 2022 March 25, 2023 March 20, 2024 March 20, 2025 March 6, 2026 March 18.Spring: last frostChance of a frost after this date10%50%90%Mar 1Apr 1Apr 4Mar 15Feb 252021: February 222022: March 252023: March 202024: March 202025: March 62026: March 18Fall at Sulphur Springs: chance of a frost before this dateFall, chance of a frost before the date: 10% October 29, 20% November 3, 30% November 7, 40% November 11, 50% November 14, 60% November 18, 70% November 23, 80% November 27, 90% December 3. Observed first fall frost in recent years: 2021 November 13, 2022 October 19, 2023 November 1, 2024 November 29, 2025 November 10.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Oct 29Nov 14Dec 32021: November 132022: October 192023: November 12024: November 292025: 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
2021February 22November 13
2022March 25October 19
2023March 20November 1
2024March 20November 29
2025March 6November 10
2026March 18season not over yet

What these dates mean

The 245 days between the 50% dates in Sulphur Springs, March 15 and November 14, frame the period when light frosts are less likely than not. The 50% dates themselves represent the median point at which a light frost (32°F) has a 50 % chance of occurring; they are not frost dates but useful reference points for gardeners.

In spring the cautious date for setting out tender crops is April 4, which carries only a 10 % chance of a frost later than that day, while the earlier date of February 25 involves a 90 % chance and is a gamble. In fall the cautious date to finish harvesting tender crops is October 29, with a 10 % chance of a frost earlier, whereas December 3 carries a 90 % chance and is risky.

A hard frost at 28°F, reflected by the median dates of March 2 and November 28, can damage plant tissue that would survive a light frost, making it a more serious concern for growers.

How to read the probabilities

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

  • Spring: "10% after April 4" 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 29" 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 Sulphur Springs, TXNumbered nearest stations: 1 — near Greenville, TX — 27 mi; 2 — Paris, TX — 37 mi; 3 — Wills Point, TX — 38 mi; 4 — Tyler, TX — 61 mi; 5 — Sherman, TX — 70 mi.TX25 mi · 40 km1. near Greenville, TX — 27 mi12. Paris, TX — 37 mi23. Wills Point, TX — 38 mi34. Tyler, TX — 61 mi45. Sherman, TX — 70 mi5
  1. near Greenville, TX 27 mi (44 km)
  2. Paris, TX 37 mi (59 km)
  3. Wills Point, TX 38 mi (61 km)
  4. Tyler, TX 61 mi (99 km)
  5. Sherman, TX 70 mi (113 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: 33.1481, -95.6269.