U.S. Frost Dates by Weather Station

NOAA station USC00267620 · Nevada

Frost Dates for Smoky Valley - Carvers, NV

NOAA weather station Smoky Valley - Carvers (USC00267620), Nevada · elevation 5647 ft (1721 m) · hardiness zone 6b*

  • Lower-risk planting dateafter June 13only 1 spring in 10 still has a frost later
  • Typical last frostMay 2450% chance of a frost after it
  • Typical first fall frostSeptember 2850% chance of a frost before it
  • Frost-free season126 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Smoky Valley - Carvers, NVSpring: a frost after May 3 in 9 years out of 10, after May 24 in half of the years, after June 13 in 1 year out of 10. Fall: the first frost comes before September 8 in 1 year out of 10, before September 28 in half of the years, before October 13 in 9 years out of 10. Typical frost-free season: 126 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 24First frost ~Sep 28Frost season at Smoky Valley - Carvers, NVSpring: a frost after May 3 in 9 years out of 10, after May 24 in half of the years, after June 13 in 1 year out of 10. Fall: the first frost comes before September 8 in 1 year out of 10, before September 28 in half of the years, before October 13 in 9 years out of 10. Typical frost-free season: 126 days.JFMAMJJASONDLast frost ~May 24First frost ~Sep 28
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 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)June 13September 8
50% (typical)May 24September 28
90% (likely)May 3October 13
Frost-free season (32°F, 50% chance)
126 days
Hard frost (28°F), last in spring, 50% chance after
May 6
Hard frost (28°F), first in fall, 50% chance before
October 8

The last 15 years (2006–2020 normals)

Typical last frost May 30 (6 days later than the 30-year normal), typical first fall frost September 28. Frost-free season 120 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 Smoky Valley - Carvers: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 13, 20% June 7, 30% June 3, 40% May 30, 50% May 24, 60% May 20, 70% May 15, 80% May 10, 90% May 3. Observed last spring frost in recent years: 2021 May 24, 2022 May 21, 2023 May 8, 2024 May 21, 2026 May 28.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jun 13May 24May 32021: May 242022: May 212023: May 82024: May 212026: May 28Fall at Smoky Valley - Carvers: chance of a frost before this dateFall, chance of a frost before the date: 10% September 8, 20% September 17, 30% September 22, 40% September 25, 50% September 28, 60% October 1, 70% October 4, 80% October 8, 90% October 13. Observed first fall frost in recent years: 2021 September 28, 2022 October 20, 2023 September 23, 2024 October 17, 2025 October 12.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Sep 8Sep 28Oct 132021: September 282022: October 202023: September 232024: October 172025: October 12
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
2021May 24September 28
2022May 21October 20
2023May 8September 23
2024May 21October 17
2025incomplete recordOctober 12
2026May 28season not over yet

What these dates mean

September 8 marks the cautious fall date for finishing the harvest of tender crops in Smoky Valley – Carvers, with only a 10 % chance that a light frost has already arrived. In spring the cautious date for setting out tender crops is June 13, when the chance of a light frost later in the season drops to 10 %.

The 50 % dates are May 24 for the spring light-frost window and September 28 for the fall window; each represents an even odds point, not a frost event. Gardeners can use those dates to gauge the midpoint of the frost-free period, which spans 126 days between the two 32 °F 50 % dates. The hard-frost 50 % dates are May 6 in spring and October 8 in fall, and a hard frost can damage plants more severely than a light frost because it occurs at a lower temperature threshold.

How to read the probabilities

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

  • Spring: "10% after June 13" 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 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 Smoky Valley - Carvers, NVNumbered nearest stations: 1 — Tonopah, NV — 51 mi; 2 — Eureka, NV — 82 mi; 3 — Beowawe 49 S - University of N Ranch, NV — 83 mi; 4 — Blue Eagle Ranch - Currant 12 SSW, NV — 90 mi; 5 — Dyer, NV — 93 mi.NVCA50 mi · 80 km1. Tonopah, NV — 51 mi12. Eureka, NV — 82 mi23. Beowawe 49 S - University of N Ranch, NV — 83 mi34. Blue Eagle Ranch - Currant 12 SSW, NV — 90 mi45. Dyer, NV — 93 mi5
  1. Tonopah, NV 51 mi (82 km)
  2. Eureka, NV 82 mi (133 km)
  3. Beowawe 49 S - University of N Ranch, NV 83 mi (134 km)
  4. Blue Eagle Ranch - Currant 12 SSW, NV 90 mi (144 km)
  5. Dyer, NV 93 mi (150 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: 38.7839, -117.1739.