U.S. Frost Dates by Weather Station

NOAA station USC00418323 · Texas

Frost Dates for Silverton, TX

NOAA weather station Silverton (USC00418323), Texas · elevation 3280 ft (1000 m) · hardiness zone 7a*

  • Lower-risk planting dateafter April 28only 1 spring in 10 still has a frost later
  • Typical last frostApril 1350% chance of a frost after it
  • Typical first fall frostOctober 2850% chance of a frost before it
  • Frost-free season197 daystypical year, 32°F
  • Hardiness zone7acalculated*

The year at a glance

Frost season at Silverton, TXSpring: a frost after March 28 in 9 years out of 10, after April 13 in half of the years, after April 28 in 1 year out of 10. Fall: the first frost comes before October 14 in 1 year out of 10, before October 28 in half of the years, before November 8 in 9 years out of 10. Typical frost-free season: 197 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 13First frost ~Oct 28Frost season at Silverton, TXSpring: a frost after March 28 in 9 years out of 10, after April 13 in half of the years, after April 28 in 1 year out of 10. Fall: the first frost comes before October 14 in 1 year out of 10, before October 28 in half of the years, before November 8 in 9 years out of 10. Typical frost-free season: 197 days.JFMAMJJASONDLast frost ~Apr 13First frost ~Oct 28
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 29 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 28October 14
50% (typical)April 13October 28
90% (likely)March 28November 8
Frost-free season (32°F, 50% chance)
197 days
Hard frost (28°F), last in spring, 50% chance after
April 3
Hard frost (28°F), first in fall, 50% chance before
November 6

The last 15 years (2006–2020 normals)

Typical last frost April 15 (2 days later than the 30-year normal), typical first fall frost October 29 (1 day later). Frost-free season 195 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 Silverton: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 28, 20% April 23, 30% April 20, 40% April 17, 50% April 13, 60% April 10, 70% April 7, 80% April 2, 90% March 28. Observed last spring frost in recent years: 2021 April 21, 2022 April 17, 2023 April 16, 2024 March 29, 2025 April 8, 2026 April 19.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 28Apr 13Mar 282021: April 212022: April 172023: April 162024: March 292025: April 82026: April 19Fall at Silverton: chance of a frost before this dateFall, chance of a frost before the date: 10% October 14, 20% October 19, 30% October 23, 40% October 25, 50% October 28, 60% October 31, 70% November 2, 80% November 5, 90% November 8. Observed first fall frost in recent years: 2021 October 16, 2022 November 5, 2023 October 29, 2024 October 31, 2025 October 30.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Oct 14Oct 28Nov 82021: October 162022: November 52023: October 292024: October 312025: October 30
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 21October 16
2022April 17November 5
2023April 16October 29
2024March 29October 31
2025April 8October 30
2026April 19season not over yet

What these dates mean

Setting out tender crops on March 28 carries a 90 % chance of a frost later in spring, a clear gamble for growers in Silverton.

The 50 % light-frost dates are April 13 and October 28; they mark the point where a frost is equally likely to occur before or after the date. The cautious spring date for tender crops is April 28, which has only a 10 % chance of a later frost, while the cautious fall date is October 14, with a 10 % chance of an earlier frost. The interval between the two 32°F 50% dates, April 13 and October 28, is 197 days, based on 29 years of record.

Hard frost is more damaging than light frost, and the 50 % hard-frost dates are April 3 in spring and November 6 in fall.

How to read the probabilities

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

  • Spring: "10% after April 28" 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 14" 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 Silverton, TXNumbered nearest stations: 1 — Turkey, TX — 24 mi; 2 — Tulia, TX — 27 mi; 3 — Plainview, TX — 30 mi; 4 — Floydada, TX — 34 mi; 5 — Memphis, TX — 47 mi.TX25 mi · 40 km1. Turkey, TX — 24 mi12. Tulia, TX — 27 mi23. Plainview, TX — 30 mi34. Floydada, TX — 34 mi45. Memphis, TX — 47 mi5
  1. Turkey, TX 24 mi (38 km)
  2. Tulia, TX 27 mi (43 km)
  3. Plainview, TX 30 mi (48 km)
  4. Floydada, TX 34 mi (54 km)
  5. Memphis, TX 47 mi (75 km)

Sources

* Hardiness zone 7a: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 34.4722, -101.3006.