U.S. Frost Dates by Weather Station

NOAA station USC00404417 · Tennessee

Frost Dates for Huntingdon, TN

NOAA weather station Huntingdon WTP (USC00404417), Tennessee · elevation 440 ft (134 m) · hardiness zone 7b*

  • Lower-risk planting dateafter April 18only 1 spring in 10 still has a frost later
  • Typical last frostApril 250% chance of a frost after it
  • Typical first fall frostOctober 3150% chance of a frost before it
  • Frost-free season211 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Huntingdon, TNSpring: a frost after March 16 in 9 years out of 10, after April 2 in half of the years, after April 18 in 1 year out of 10. Fall: the first frost comes before October 19 in 1 year out of 10, before October 31 in half of the years, before November 13 in 9 years out of 10. Typical frost-free season: 211 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 2First frost ~Oct 31Frost season at Huntingdon, TNSpring: a frost after March 16 in 9 years out of 10, after April 2 in half of the years, after April 18 in 1 year out of 10. Fall: the first frost comes before October 19 in 1 year out of 10, before October 31 in half of the years, before November 13 in 9 years out of 10. Typical frost-free season: 211 days.JFMAMJJASONDLast frost ~Apr 2First frost ~Oct 31
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 26 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 18October 19
50% (typical)April 2October 31
90% (likely)March 16November 13
Frost-free season (32°F, 50% chance)
211 days
Hard frost (28°F), last in spring, 50% chance after
March 21
Hard frost (28°F), first in fall, 50% chance before
November 9

The last 15 years (2006–2020 normals)

Typical last frost April 3 (1 day later than the 30-year normal), typical first fall frost November 1 (1 day later). Frost-free season 211 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 Huntingdon: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 18, 20% April 13, 30% April 9, 40% April 5, 50% April 2, 60% March 31, 70% March 26, 80% March 22, 90% March 16. Observed last spring frost in recent years: 2021 April 3, 2022 April 2, 2023 March 21, 2024 March 20, 2025 March 22.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 18Apr 2Mar 162021: April 32022: April 22023: March 212024: March 202025: March 22Fall at Huntingdon: chance of a frost before this dateFall, chance of a frost before the date: 10% October 19, 20% October 23, 30% October 25, 40% October 28, 50% October 31, 60% November 2, 70% November 4, 80% November 7, 90% November 13. Observed first fall frost in recent years: 2021 November 4, 2022 October 18, 2023 October 31, 2024 November 23.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 19Oct 31Nov 132021: November 42022: October 182023: October 312024: November 23
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 3November 4
2022April 2October 18
2023March 21October 31
2024March 20November 23
2025March 22incomplete record
2026incomplete recordseason not over yet

What these dates mean

In Huntingdon there are 211 days between the two 32°F 50% dates, April 2 and October 31, and those days define the core growing window.

The 50% date is April 2, indicating an even chance of a light frost occurring later; similarly the 50% date is October 31, an even chance of a light frost occurring earlier. Gardeners who wish to minimize risk can plan to set out tender crops no earlier than the cautious spring date, April 18, which carries only a 10% chance of a later frost, and to finish harvesting tender crops no later than the cautious fall date, October 19, which carries only a 10% chance of an earlier frost. Planting on March 16 or extending into November 13 would be a gamble with a 90% chance of frost.

A hard frost (28°F) can damage plants more severely than a light frost (32°F), so the median hard-frost dates March 21 and November 9 highlight when such deeper freezes become a 50% possibility.

How to read the probabilities

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

  • Spring: "10% after April 18" 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 19" 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 Huntingdon, TNNumbered nearest stations: 1 — Lexington, TN — 24 mi; 2 — Martin, TN — 34 mi; 3 — near Jackson, TN — 35 mi; 4 — Jackson (McKellar Airport), TN — 39 mi; 5 — Murray, KY — 43 mi.MOAR25 mi · 40 km1. Lexington, TN — 24 mi12. Martin, TN — 34 mi23. near Jackson, TN — 35 mi34. Jackson (McKellar Airport), TN — 39 mi45. Murray, KY — 43 mi5
  1. Lexington, TN 24 mi (39 km)
  2. Martin, TN 34 mi (55 km)
  3. near Jackson, TN 35 mi (57 km)
  4. Jackson (McKellar Airport), TN 39 mi (64 km)
  5. Murray, KY 43 mi (69 km)

Sources

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

Station coordinates: 36.0028, -88.4253.