U.S. Frost Dates by Weather Station

NOAA station USC00409866 · Tennessee

Frost Dates for Woodbury, TN

NOAA weather station Woodbury 1 WNW (USC00409866), Tennessee · elevation 750 ft (229 m) · hardiness zone 7b*

  • Lower-risk planting dateafter May 2only 1 spring in 10 still has a frost later
  • Typical last frostApril 1750% chance of a frost after it
  • Typical first fall frostOctober 2150% chance of a frost before it
  • Frost-free season184 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Woodbury, TNSpring: a frost after April 3 in 9 years out of 10, after April 17 in half of the years, after May 2 in 1 year out of 10. Fall: the first frost comes before October 8 in 1 year out of 10, before October 21 in half of the years, before November 3 in 9 years out of 10. Typical frost-free season: 184 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 17First frost ~Oct 21Frost season at Woodbury, TNSpring: a frost after April 3 in 9 years out of 10, after April 17 in half of the years, after May 2 in 1 year out of 10. Fall: the first frost comes before October 8 in 1 year out of 10, before October 21 in half of the years, before November 3 in 9 years out of 10. Typical frost-free season: 184 days.JFMAMJJASONDLast frost ~Apr 17First frost ~Oct 21
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 30 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 2October 8
50% (typical)April 17October 21
90% (likely)April 3November 3
Frost-free season (32°F, 50% chance)
184 days
Hard frost (28°F), last in spring, 50% chance after
April 5
Hard frost (28°F), first in fall, 50% chance before
October 29

The last 15 years (2006–2020 normals)

Typical last frost April 17 (same as the 30-year normal), typical first fall frost October 25 (4 days later). Frost-free season 191 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 Woodbury: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 2, 20% April 27, 30% April 23, 40% April 20, 50% April 17, 60% April 15, 70% April 12, 80% April 8, 90% April 3. Observed last spring frost in recent years: 2021 April 22, 2024 March 20, 2025 April 10, 2026 March 19.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1May 2Apr 17Apr 32021: April 222024: March 202025: April 102026: March 19Fall at Woodbury: chance of a frost before this dateFall, chance of a frost before the date: 10% October 8, 20% October 12, 30% October 15, 40% October 18, 50% October 21, 60% October 23, 70% October 26, 80% October 29, 90% November 3. Observed first fall frost in recent years: 2021 November 5, 2023 November 1, 2024 November 29, 2025 November 10.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Dec 1Oct 8Oct 21Nov 32021: November 52023: 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
2021April 22November 5
2022incomplete recordno data
2023no dataNovember 1
2024March 20November 29
2025April 10November 10
2026March 19season not over yet

What these dates mean

Setting out tender crops on April 3 in Woodbury is a gamble, because there is a 90% chance a light frost will occur later. The 50% date is April 17, at which point there is an even chance of a frost later in the season. For a cautious plan, the spring date used for tender crops is May 2, when the chance of a frost later drops to 10%.

In the fall, the cautious date to finish harvesting tender crops is October 8, with only a 10% chance a light frost has already arrived. The 50% date is October 21, when there is a 50% chance of a frost earlier. A hard frost of 28 °F, marked by the 50% dates of April 5 in spring and October 29 in fall, can damage plants more severely than a light frost of 32 °F.

How to read the probabilities

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

  • Spring: "10% after May 2" 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 8" 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 Woodbury, TNNumbered nearest stations: 1 — Murfreesboro, TN — 17 mi; 2 — Smithville, TN — 18 mi; 3 — McMinnville, TN — 21 mi; 4 — Carthage, TN — 29 mi; 5 — near Shelbyville, TN — 32 mi.KY25 mi · 40 km1. Murfreesboro, TN — 17 mi12. Smithville, TN — 18 mi23. McMinnville, TN — 21 mi34. Carthage, TN — 29 mi45. near Shelbyville, TN — 32 mi5
  1. Murfreesboro, TN 17 mi (27 km)
  2. Smithville, TN 18 mi (29 km)
  3. McMinnville, TN 21 mi (33 km)
  4. Carthage, TN 29 mi (47 km)
  5. near Shelbyville, TN 32 mi (52 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: 35.8375, -86.0894.