U.S. Frost Dates by Weather Station

NOAA station USC00260800 · Nevada

Frost Dates for Beowawe 49 S - University of N Ranch, NV

NOAA weather station Beowawe 49 S - University of N Ranch (USC00260800), Nevada · elevation 5740 ft (1750 m) · hardiness zone 5b*

  • Lower-risk planting dateafter June 16only 1 spring in 10 still has a frost later
  • Typical last frostMay 2850% chance of a frost after it
  • Typical first fall frostSeptember 2150% chance of a frost before it
  • Frost-free season114 daystypical year, 32°F
  • Hardiness zone5bcalculated*

The year at a glance

Frost season at Beowawe 49 S - University of N Ranch, NVSpring: a frost after May 11 in 9 years out of 10, after May 28 in half of the years, after June 16 in 1 year out of 10. Fall: the first frost comes before September 6 in 1 year out of 10, before September 21 in half of the years, before October 3 in 9 years out of 10. Typical frost-free season: 114 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 28First frost ~Sep 21Frost season at Beowawe 49 S - University of N Ranch, NVSpring: a frost after May 11 in 9 years out of 10, after May 28 in half of the years, after June 16 in 1 year out of 10. Fall: the first frost comes before September 6 in 1 year out of 10, before September 21 in half of the years, before October 3 in 9 years out of 10. Typical frost-free season: 114 days.JFMAMJJASONDLast frost ~May 28First frost ~Sep 21
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 16September 6
50% (typical)May 28September 21
90% (likely)May 11October 3
Frost-free season (32°F, 50% chance)
114 days
Hard frost (28°F), last in spring, 50% chance after
May 12
Hard frost (28°F), first in fall, 50% chance before
October 1

The last 15 years (2006–2020 normals)

Typical last frost May 29 (1 day later than the 30-year normal), typical first fall frost September 21. Frost-free season 113 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 Beowawe 49 S - University of N Ranch: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 16, 20% June 9, 30% June 5, 40% June 1, 50% May 28, 60% May 24, 70% May 20, 80% May 16, 90% May 11. Observed last spring frost in recent years: 2021 June 11, 2022 June 20, 2023 May 11, 2024 June 21, 2025 June 23, 2026 June 27.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jul 1Jun 16May 28May 112021: June 112022: June 202023: May 112024: June 212025: June 232026: June 27Fall at Beowawe 49 S - University of N Ranch: chance of a frost before this dateFall, chance of a frost before the date: 10% September 6, 20% September 10, 30% September 15, 40% September 18, 50% September 21, 60% September 24, 70% September 26, 80% September 29, 90% October 3. Observed first fall frost in recent years: 2021 September 21, 2022 October 2, 2023 September 23, 2024 September 24, 2025 October 6.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Sep 6Sep 21Oct 32021: September 212022: October 22023: September 232024: September 242025: October 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
2021June 11September 21
2022June 20October 2
2023May 11September 23
2024June 21September 24
2025June 23October 6
2026June 27season not over yet

What these dates mean

Planting tender crops on the early spring date of May 11 carries a 90% chance of a frost later that season. The cautious spring date for setting out tender crops is June 16, when only a 10% chance of a later frost remains.

The 50% date is May 28; there is a 50% chance of a frost later than this date. The cautious fall date to finish harvesting tender crops is September 6, with only a 10% chance that a frost has already arrived. The 50% date is September 21; there is a 50% chance of a frost earlier than this date. Hard frost at 28°F, noted on May 12 in spring and October 1 in fall, can damage plant tissue that survives 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 June 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 September 6" 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 Beowawe 49 S - University of N Ranch, NVNumbered nearest stations: 1 — Eureka, NV — 43 mi; 2 — Beowawe, NV — 48 mi; 3 — Battle Mountain, NV — 52 mi; 4 — Ruby Lake NWR, NV — 62 mi; 5 — Elko, NV — 77 mi.NV25 mi · 40 km1. Eureka, NV — 43 mi12. Beowawe, NV — 48 mi23. Battle Mountain, NV — 52 mi34. Ruby Lake NWR, NV — 62 mi45. Elko, NV — 77 mi5
  1. Eureka, NV 43 mi (68 km)
  2. Beowawe, NV 48 mi (77 km)
  3. Battle Mountain, NV 52 mi (83 km)
  4. Ruby Lake NWR, NV 62 mi (99 km)
  5. Elko, NV 77 mi (123 km)

Sources

* Hardiness zone 5b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 39.9003, -116.5875.