U.S. Frost Dates by Weather Station

NOAA station USW00024119 · Nevada

Frost Dates for Battle Mountain, NV

NOAA weather station Battle Mountain 4 SE (USW00024119), Nevada · elevation 4505 ft (1373 m) · hardiness zone 6b*

  • Lower-risk planting dateafter May 31only 1 spring in 10 still has a frost later
  • Typical last frostMay 950% chance of a frost after it
  • Typical first fall frostSeptember 2950% chance of a frost before it
  • Frost-free season141 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Battle Mountain, NVSpring: a frost after April 23 in 9 years out of 10, after May 9 in half of the years, after May 31 in 1 year out of 10. Fall: the first frost comes before September 15 in 1 year out of 10, before September 29 in half of the years, before October 11 in 9 years out of 10. Typical frost-free season: 141 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 9First frost ~Sep 29Frost season at Battle Mountain, NVSpring: a frost after April 23 in 9 years out of 10, after May 9 in half of the years, after May 31 in 1 year out of 10. Fall: the first frost comes before September 15 in 1 year out of 10, before September 29 in half of the years, before October 11 in 9 years out of 10. Typical frost-free season: 141 days.JFMAMJJASONDLast frost ~May 9First frost ~Sep 29
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 28 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 31September 15
50% (typical)May 9September 29
90% (likely)April 23October 11
Frost-free season (32°F, 50% chance)
141 days
Hard frost (28°F), last in spring, 50% chance after
April 23
Hard frost (28°F), first in fall, 50% chance before
October 9

The last 15 years (2006–2020 normals)

Typical last frost May 13 (4 days later than the 30-year normal), typical first fall frost October 1 (2 days later). Frost-free season 137 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 Battle Mountain: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 31, 20% May 23, 30% May 17, 40% May 12, 50% May 9, 60% May 6, 70% May 2, 80% April 28, 90% April 23. Observed last spring frost in recent years: 2021 May 21, 2025 June 22.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1May 31May 9Apr 232021: May 212025: June 22Fall at Battle Mountain: chance of a frost before this dateFall, chance of a frost before the date: 10% September 15, 20% September 19, 30% September 23, 40% September 26, 50% September 29, 60% October 1, 70% October 4, 80% October 7, 90% October 11. Observed first fall frost in recent years: 2021 September 29, 2025 October 8.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Sep 15Sep 29Oct 112021: September 292025: October 8
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 21September 29
2022incomplete recordincomplete record
2023incomplete recordno data
2024no datano data
2025June 22October 8
2026incomplete recordseason not over yet

What these dates mean

May 31 is the cautious spring date for Battle Mountain; with only a 10 % chance of a light frost occurring later, it lets a gardener plan to set out tender crops with minimal risk.

The 50 % dates represent the point at which a light frost is equally likely to have happened or not. In spring the 50 % date is May 9 and in fall it is September 29; the hard-frost 50 % dates are April 23 and October 9. The cautious date for tender crops in spring is May 31, while the cautious fall date is September 15. The span between the 32°F 50 % dates—May 9 to September 29—is 141 days, derived from 28 years of record. A hard frost at 28 °F can damage plant tissue 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 31" 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 15" 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 Battle Mountain, NVNumbered nearest stations: 1 — Beowawe, NV — 22 mi; 2 — Beowawe 49 S - University of N Ranch, NV — 52 mi; 3 — Winnemucca, NV — 52 mi; 4 — Elko, NV — 60 mi; 5 — Imlay, NV — 67 mi.NV25 mi · 40 km1. Beowawe, NV — 22 mi12. Beowawe 49 S - University of N Ranch, NV — 52 mi23. Winnemucca, NV — 52 mi34. Elko, NV — 60 mi45. Imlay, NV — 67 mi5
  1. Beowawe, NV 22 mi (35 km)
  2. Beowawe 49 S - University of N Ranch, NV 52 mi (83 km)
  3. Winnemucca, NV 52 mi (84 km)
  4. Elko, NV 60 mi (96 km)
  5. Imlay, NV 67 mi (107 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: 40.6117, -116.8917.