U.S. Frost Dates by Weather Station

NOAA station USC00312238 · North Carolina

Frost Dates for Danbury, NC

NOAA weather station Danbury (USC00312238), North Carolina · elevation 1019 ft (311 m) · hardiness zone 7b*

  • Lower-risk planting dateafter April 29only 1 spring in 10 still has a frost later
  • Typical last frostApril 1150% chance of a frost after it
  • Typical first fall frostOctober 3050% chance of a frost before it
  • Frost-free season202 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Danbury, NCSpring: a frost after March 25 in 9 years out of 10, after April 11 in half of the years, after April 29 in 1 year out of 10. Fall: the first frost comes before October 18 in 1 year out of 10, before October 30 in half of the years, before November 12 in 9 years out of 10. Typical frost-free season: 202 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 11First frost ~Oct 30Frost season at Danbury, NCSpring: a frost after March 25 in 9 years out of 10, after April 11 in half of the years, after April 29 in 1 year out of 10. Fall: the first frost comes before October 18 in 1 year out of 10, before October 30 in half of the years, before November 12 in 9 years out of 10. Typical frost-free season: 202 days.JFMAMJJASONDLast frost ~Apr 11First frost ~Oct 30
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 29October 18
50% (typical)April 11October 30
90% (likely)March 25November 12
Frost-free season (32°F, 50% chance)
202 days
Hard frost (28°F), last in spring, 50% chance after
March 27
Hard frost (28°F), first in fall, 50% chance before
November 9

The last 15 years (2006–2020 normals)

Typical last frost April 8 (3 days earlier than the 30-year normal), typical first fall frost November 2 (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 Danbury: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 29, 20% April 22, 30% April 17, 40% April 13, 50% April 11, 60% April 8, 70% April 4, 80% March 31, 90% March 25. Observed last spring frost in recent years: 2021 April 24, 2022 April 21, 2023 March 22, 2024 March 26, 2025 April 10, 2026 March 30.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 29Apr 11Mar 252021: April 242022: April 212023: March 222024: March 262025: April 102026: March 30Fall at Danbury: chance of a frost before this dateFall, chance of a frost before the date: 10% October 18, 20% October 22, 30% October 25, 40% October 28, 50% October 30, 60% November 1, 70% November 4, 80% November 7, 90% November 12. Observed first fall frost in recent years: 2021 November 5, 2022 October 19, 2023 November 2, 2024 November 22, 2025 November 11.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 18Oct 30Nov 122021: November 52022: October 192023: November 22024: November 222025: 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 24November 5
2022April 21October 19
2023March 22November 2
2024March 26November 22
2025April 10November 11
2026March 30season not over yet

What these dates mean

April 29 is the cautious spring date for Danbury; with only a 10% chance of a light frost later, a gardener can plan to set out tender crops. The 50% spring date, April 11, marks a day with a 50% chance of frost later, while the median hard-frost date is March 27.

October 18 serves as the cautious fall date, giving a gardener just a 10% chance that a light frost has arrived earlier, so tender crops can be finished safely. The 50% fall date, October 30, carries a 50% chance of frost earlier, and the median hard-frost date is November 9. Hard frost at 28 °F can damage plant tissue that survives a light frost at 32 °F, making it a more serious threat.

How to read the probabilities

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

  • Spring: "10% after April 29" 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 18" 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 Danbury, NCNumbered nearest stations: 1 — Stuart, VA — 15 mi; 2 — near Greensboro, NC — 26 mi; 3 — Reidsville, NC — 27 mi; 4 — Lexington, NC — 41 mi; 5 — Christiansburg, VA — 50 mi.VA25 mi · 40 km1. Stuart, VA — 15 mi12. near Greensboro, NC — 26 mi23. Reidsville, NC — 27 mi34. Lexington, NC — 41 mi45. Christiansburg, VA — 50 mi5
  1. Stuart, VA 15 mi (24 km)
  2. near Greensboro, NC 26 mi (43 km)
  3. Reidsville, NC 27 mi (44 km)
  4. Lexington, NC 41 mi (65 km)
  5. Christiansburg, VA 50 mi (80 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: 36.43, -80.1789.