U.S. Frost Dates by Weather Station

NOAA station USC00264950 · Nevada

Frost Dates for McGill, NV

NOAA weather station McGill (USC00264950), Nevada · elevation 6270 ft (1911 m) · hardiness zone 6a*

  • Lower-risk planting dateafter June 13only 1 spring in 10 still has a frost later
  • Typical last frostMay 2850% chance of a frost after it
  • Typical first fall frostSeptember 2450% chance of a frost before it
  • Frost-free season119 daystypical year, 32°F
  • Hardiness zone6acalculated*

The year at a glance

Frost season at McGill, NVSpring: a frost after May 10 in 9 years out of 10, after May 28 in half of the years, after June 13 in 1 year out of 10. Fall: the first frost comes before September 11 in 1 year out of 10, before September 24 in half of the years, before October 6 in 9 years out of 10. Typical frost-free season: 119 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 28First frost ~Sep 24Frost season at McGill, NVSpring: a frost after May 10 in 9 years out of 10, after May 28 in half of the years, after June 13 in 1 year out of 10. Fall: the first frost comes before September 11 in 1 year out of 10, before September 24 in half of the years, before October 6 in 9 years out of 10. Typical frost-free season: 119 days.JFMAMJJASONDLast frost ~May 28First frost ~Sep 24
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 26 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)June 13September 11
50% (typical)May 28September 24
90% (likely)May 10October 6
Frost-free season (32°F, 50% chance)
119 days
Hard frost (28°F), last in spring, 50% chance after
May 11
Hard frost (28°F), first in fall, 50% chance before
October 4

The last 15 years (2006–2020 normals)

Typical last frost May 28 (same as the 30-year normal), typical first fall frost September 25 (1 day later). Frost-free season 119 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 McGill: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 13, 20% June 7, 30% June 4, 40% May 31, 50% May 28, 60% May 24, 70% May 21, 80% May 15, 90% May 10. Observed last spring frost in recent years: 2023 May 13, 2024 June 18, 2025 June 22, 2026 June 29.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jul 1Jun 13May 28May 102023: May 132024: June 182025: June 222026: June 29Fall at McGill: chance of a frost before this dateFall, chance of a frost before the date: 10% September 11, 20% September 16, 30% September 20, 40% September 22, 50% September 24, 60% September 27, 70% September 29, 80% October 1, 90% October 6. Observed first fall frost in recent years: 2023 September 23, 2024 October 16, 2025 October 5.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Sep 11Sep 24Oct 62023: September 232024: October 162025: October 5
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
2021no datano data
2022no dataincomplete record
2023May 13September 23
2024June 18October 16
2025June 22October 5
2026June 29season not over yet

What these dates mean

June 13, with a 10 % chance of a light frost later, is the cautious spring date for setting out tender crops. By choosing this date, a gardener can plant seedlings with a low risk of a frost disrupting growth.

The median light-frost dates are May 28 in spring and September 24 in fall; each represents a 50 % chance of a frost later in spring or earlier in fall, and they are not frost dates themselves. September 11, with a 10 % chance of a frost earlier, is the cautious fall date for finishing the harvest of tender crops. Because a hard frost at 28 °F can injure or kill seedlings that would survive a 32 °F light frost, the 50 % hard-frost dates of May 11 and October 4 are especially important for gardeners.

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 11" 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 McGill, NVNumbered nearest stations: 1 — near Ely, NV — 9 mi; 2 — Lages, NV — 46 mi; 3 — Eskdale, UT — 49 mi; 4 — Partoun, UT — 50 mi; 5 — Ibapah, UT — 60 mi.NVUT25 mi · 40 km1. near Ely, NV — 9 mi12. Lages, NV — 46 mi23. Eskdale, UT — 49 mi34. Partoun, UT — 50 mi45. Ibapah, UT — 60 mi5
  1. near Ely, NV 9 mi (15 km)
  2. Lages, NV 46 mi (74 km)
  3. Eskdale, UT 49 mi (78 km)
  4. Partoun, UT 50 mi (80 km)
  5. Ibapah, UT 60 mi (97 km)

Sources

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

Station coordinates: 39.4136, -114.7733.