U.S. Frost Dates by Weather Station

NOAA station USC00465224 · West Virginia

Frost Dates for Lewisburg, WV

NOAA weather station Lewisburg 3 N (USC00465224), West Virginia · elevation 2300 ft (701 m) · hardiness zone 6b*

  • Lower-risk planting dateafter May 21only 1 spring in 10 still has a frost later
  • Typical last frostMay 350% chance of a frost after it
  • Typical first fall frostOctober 950% chance of a frost before it
  • Frost-free season158 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Lewisburg, WVSpring: a frost after April 17 in 9 years out of 10, after May 3 in half of the years, after May 21 in 1 year out of 10. Fall: the first frost comes before September 25 in 1 year out of 10, before October 9 in half of the years, before October 24 in 9 years out of 10. Typical frost-free season: 158 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 3First frost ~Oct 9Frost season at Lewisburg, WVSpring: a frost after April 17 in 9 years out of 10, after May 3 in half of the years, after May 21 in 1 year out of 10. Fall: the first frost comes before September 25 in 1 year out of 10, before October 9 in half of the years, before October 24 in 9 years out of 10. Typical frost-free season: 158 days.JFMAMJJASONDLast frost ~May 3First frost ~Oct 9
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)May 21September 25
50% (typical)May 3October 9
90% (likely)April 17October 24
Frost-free season (32°F, 50% chance)
158 days
Hard frost (28°F), last in spring, 50% chance after
April 19
Hard frost (28°F), first in fall, 50% chance before
October 20

The last 15 years (2006–2020 normals)

Typical last frost April 30 (3 days earlier than the 30-year normal), typical first fall frost October 16 (7 days later). Frost-free season 168 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 Lewisburg: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 21, 20% May 15, 30% May 10, 40% May 6, 50% May 3, 60% April 29, 70% April 26, 80% April 22, 90% April 17. Observed last spring frost in recent years: 2021 April 24, 2022 April 22, 2023 May 5, 2024 April 24, 2025 April 18, 2026 May 2.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1May 21May 3Apr 172021: April 242022: April 222023: May 52024: April 242025: April 182026: May 2Fall at Lewisburg: chance of a frost before this dateFall, chance of a frost before the date: 10% September 25, 20% October 1, 30% October 4, 40% October 7, 50% October 9, 60% October 12, 70% October 15, 80% October 19, 90% October 24. Observed first fall frost in recent years: 2021 November 3, 2022 October 9, 2023 October 19, 2024 October 11, 2025 October 17.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Sep 25Oct 9Oct 242021: November 32022: October 92023: October 192024: October 112025: October 17
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 3
2022April 22October 9
2023May 5October 19
2024April 24October 11
2025April 18October 17
2026May 2season not over yet

What these dates mean

Setting tender crops on April 17 in Lewisburg carries a 90% chance that a light frost will occur later, making that a gamble for gardeners. The 50% date for light frost in spring is May 3, which marks the median point of the 29-year record; there is a 50% chance of a frost later than this date. In fall the 50% date is October 9, meaning a 50% chance of a frost earlier than this date. A cautious approach uses the 10% chance dates—May 21 for starting tender crops in spring and September 25 for finishing tender crops in fall—because the risk of frost is low on those days. Hard frost at 28 °F, with median dates of April 19 and October 20, can injure plants more severely than a light frost at 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 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 September 25" 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 Lewisburg, WVNumbered nearest stations: 1 — White Sulphur Springs, WV — 7 mi; 2 — Covington, VA — 23 mi; 3 — Gathright Dam, VA — 25 mi; 4 — Buckeye, WV — 27 mi; 5 — Marlinton, WV — 30 mi.WVVA25 mi · 40 km1. White Sulphur Springs, WV — 7 mi12. Covington, VA — 23 mi23. Gathright Dam, VA — 25 mi34. Buckeye, WV — 27 mi45. Marlinton, WV — 30 mi5
  1. White Sulphur Springs, WV 7 mi (11 km)
  2. Covington, VA 23 mi (37 km)
  3. Gathright Dam, VA 25 mi (41 km)
  4. Buckeye, WV 27 mi (44 km)
  5. Marlinton, WV 30 mi (49 km)

Sources

* Hardiness zone 6b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 37.8567, -80.4042.