U.S. Frost Dates by Weather Station

NOAA station USC00408179 · Tennessee

Frost Dates for Sevierville, TN

NOAA weather station Sevierville (USC00408179), Tennessee · elevation 899 ft (274 m) · hardiness zone 7b*

  • Lower-risk planting dateafter April 21only 1 spring in 10 still has a frost later
  • Typical last frostApril 650% chance of a frost after it
  • Typical first fall frostOctober 2950% chance of a frost before it
  • Frost-free season205 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Sevierville, TNSpring: a frost after March 23 in 9 years out of 10, after April 6 in half of the years, after April 21 in 1 year out of 10. Fall: the first frost comes before October 16 in 1 year out of 10, before October 29 in half of the years, before November 11 in 9 years out of 10. Typical frost-free season: 205 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 6First frost ~Oct 29Frost season at Sevierville, TNSpring: a frost after March 23 in 9 years out of 10, after April 6 in half of the years, after April 21 in 1 year out of 10. Fall: the first frost comes before October 16 in 1 year out of 10, before October 29 in half of the years, before November 11 in 9 years out of 10. Typical frost-free season: 205 days.JFMAMJJASONDLast frost ~Apr 6First frost ~Oct 29
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 25 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 21October 16
50% (typical)April 6October 29
90% (likely)March 23November 11
Frost-free season (32°F, 50% chance)
205 days
Hard frost (28°F), last in spring, 50% chance after
March 27
Hard frost (28°F), first in fall, 50% chance before
November 7

The last 15 years (2006–2020 normals)

Typical last frost April 5 (1 day earlier than the 30-year normal), typical first fall frost November 1 (3 days later). Frost-free season 209 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 Sevierville: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 21, 20% April 16, 30% April 11, 40% April 9, 50% April 6, 60% April 4, 70% April 1, 80% March 29, 90% March 23. Observed last spring frost in recent years: 2021 April 23, 2022 April 11, 2023 March 26, 2024 April 4, 2025 April 9, 2026 March 30.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 21Apr 6Mar 232021: April 232022: April 112023: March 262024: April 42025: April 92026: March 30Fall at Sevierville: chance of a frost before this dateFall, chance of a frost before the date: 10% October 16, 20% October 21, 30% October 23, 40% October 26, 50% October 29, 60% October 31, 70% November 2, 80% November 6, 90% November 11. Observed first fall frost in recent years: 2021 November 7, 2022 October 18, 2023 November 1, 2024 November 24, 2025 November 11.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Oct 16Oct 29Nov 112021: November 72022: October 182023: November 12024: November 242025: 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
2021April 23November 7
2022April 11October 18
2023March 26November 1
2024April 4November 24
2025April 9November 11
2026March 30season not over yet

What these dates mean

October 16 is the cautious fall date for finishing the harvest of tender crops in Sevierville, marking a 10% chance that a light frost has arrived earlier.

For planning, a cautious spring schedule uses April 21, the date with only a 10% chance of a light frost later, while the 50% light-frost dates—April 6 and October 29—represent the median point where frost is equally likely on either side of the season. The hard-frost 50% dates are March 27 in spring and November 7 in fall, indicating the midpoint of 28 °F events. The 90% gamble dates are March 23 in spring and November 11 in fall, when a light frost is still very likely. The interval between the two 32°F 50% dates—April 6 and October 29—spans 205 days, based on 25 years of record.

A hard frost matters more than a light frost because the lower temperature can damage plants that survive 32 °F conditions.

How to read the probabilities

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

  • Spring: "10% after April 21" 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 16" 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 Sevierville, TNNumbered nearest stations: 1 — Gatlinburg, TN — 17 mi; 2 — near Knoxville, TN — 20 mi; 3 — Mount Leconte, TN — 21 mi; 4 — Newport, TN — 23 mi; 5 — Knoxville (McGhee Tyson Airport), TN — 23 mi.TNNC25 mi · 40 km1. Gatlinburg, TN — 17 mi12. near Knoxville, TN — 20 mi23. Mount Leconte, TN — 21 mi34. Newport, TN — 23 mi45. Knoxville (McGhee Tyson Airport), TN — 23 mi5
  1. Gatlinburg, TN 17 mi (27 km)
  2. near Knoxville, TN 20 mi (32 km)
  3. Mount Leconte, TN 21 mi (34 km)
  4. Newport, TN 23 mi (36 km)
  5. Knoxville (McGhee Tyson Airport), TN 23 mi (37 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: 35.9297, -83.5983.