U.S. Frost Dates by Weather Station

NOAA station USC00265846 · Nevada

Frost Dates for Overton, NV

NOAA weather station Overton (USC00265846), Nevada · elevation 1250 ft (381 m) · hardiness zone 9a*

  • Lower-risk planting dateafter March 16only 1 spring in 10 still has a frost later
  • Typical last frostFebruary 2650% chance of a frost after it
  • Typical first fall frostNovember 2250% chance of a frost before it
  • Frost-free season268 daystypical year, 32°F
  • Hardiness zone9acalculated*

The year at a glance

Frost season at Overton, NVSpring: a frost after February 4 in 9 years out of 10, after February 26 in half of the years, after March 16 in 1 year out of 10. Fall: the first frost comes before November 9 in 1 year out of 10, before November 22 in half of the years, before December 6 in 9 years out of 10. Typical frost-free season: 268 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Feb 26First frost ~Nov 22Frost season at Overton, NVSpring: a frost after February 4 in 9 years out of 10, after February 26 in half of the years, after March 16 in 1 year out of 10. Fall: the first frost comes before November 9 in 1 year out of 10, before November 22 in half of the years, before December 6 in 9 years out of 10. Typical frost-free season: 268 days.JFMAMJJASONDLast frost ~Feb 26First frost ~Nov 22
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)March 16November 9
50% (typical)February 26November 22
90% (likely)February 4December 6
Frost-free season (32°F, 50% chance)
268 days
Hard frost (28°F), last in spring, 50% chance after
February 5
Hard frost (28°F), first in fall, 50% chance before
December 2

The last 15 years (2006–2020 normals)

Typical last frost February 24 (2 days earlier than the 30-year normal), typical first fall frost November 26 (4 days later). Frost-free season 275 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 Overton: chance of a frost after this dateSpring, chance of a frost after the date: 10% March 16, 20% March 8, 30% March 3, 40% February 28, 50% February 26, 60% February 21, 70% February 17, 80% February 10, 90% February 4. Observed last spring frost in recent years: 2021 March 16, 2022 March 1, 2023 February 19, 2024 January 18, 2025 February 2, 2026 February 22.Spring: last frostChance of a frost after this date10%50%90%Feb 1Mar 1Mar 16Feb 26Feb 42021: March 162022: March 12023: February 192024: January 182025: February 22026: February 22Fall at Overton: chance of a frost before this dateFall, chance of a frost before the date: 10% November 9, 20% November 13, 30% November 16, 40% November 19, 50% November 22, 60% November 24, 70% November 27, 80% December 1, 90% December 6. Observed first fall frost in recent years: 2021 December 12, 2022 November 24, 2023 December 12, 2024 November 22, 2025 December 6.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Nov 9Nov 22Dec 62021: December 122022: November 242023: December 122024: November 222025: December 6
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
2021March 16December 12
2022March 1November 24
2023February 19December 12
2024January 18November 22
2025February 2December 6
2026February 22season not over yet

What these dates mean

November 9 is the cautious fall date for finishing the harvest of tender crops in Overton, since only a 10 % chance of a light frost has occurred earlier. The later November 22 date is the 50 % point for light frost, meaning a frost is equally likely to occur earlier than that date.

In spring, gardeners rely on March 16 as the cautious light-frost date, because there is only a 10 % chance of frost after it; the earlier February 4 date carries a 90 % chance and is a gamble. The 50 % light-frost date is February 26, indicating an even chance of a frost later than that date. The 50 % hard-frost dates, February 5 in spring and December 2 in fall, mark the median moments when temperatures reach 28 °F.

A hard frost at 28 °F can damage tender 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 March 16" 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 November 9" 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 Overton, NVNumbered nearest stations: 1 — Desert NWR, NV — 51 mi; 2 — Caliente, NV — 73 mi; 3 — Mercury Desert Rock Airport, NV — 87 mi; 4 — New Harmony, UT — 90 mi; 5 — Pahrump, NV — 91 mi.NVAZUT25 mi · 40 km1. Desert NWR, NV — 51 mi12. Caliente, NV — 73 mi23. Mercury Desert Rock Airport, NV — 87 mi34. New Harmony, UT — 90 mi45. Pahrump, NV — 91 mi5
  1. Desert NWR, NV 51 mi (82 km)
  2. Caliente, NV 73 mi (118 km)
  3. Mercury Desert Rock Airport, NV 87 mi (140 km)
  4. New Harmony, UT 90 mi (145 km)
  5. Pahrump, NV 91 mi (147 km)

Sources

* Hardiness zone 9a: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 36.5508, -114.4581.