U.S. Frost Dates by Weather Station

NOAA station USC00260795 · Nevada

Frost Dates for Beowawe, NV

NOAA weather station Beowawe (USC00260795), Nevada · elevation 4700 ft (1433 m) · hardiness zone 5b*

  • Lower-risk planting dateafter June 18only 1 spring in 10 still has a frost later
  • Typical last frostJune 250% chance of a frost after it
  • Typical first fall frostSeptember 1750% chance of a frost before it
  • Frost-free season105 daystypical year, 32°F
  • Hardiness zone5bcalculated*

The year at a glance

Frost season at Beowawe, NVSpring: a frost after May 13 in 9 years out of 10, after June 2 in half of the years, after June 18 in 1 year out of 10. Fall: the first frost comes before September 2 in 1 year out of 10, before September 17 in half of the years, before October 1 in 9 years out of 10. Typical frost-free season: 105 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Jun 2First frost ~Sep 17Frost season at Beowawe, NVSpring: a frost after May 13 in 9 years out of 10, after June 2 in half of the years, after June 18 in 1 year out of 10. Fall: the first frost comes before September 2 in 1 year out of 10, before September 17 in half of the years, before October 1 in 9 years out of 10. Typical frost-free season: 105 days.JFMAMJJASONDLast frost ~Jun 2First frost ~Sep 17
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)June 18September 2
50% (typical)June 2September 17
90% (likely)May 13October 1
Frost-free season (32°F, 50% chance)
105 days
Hard frost (28°F), last in spring, 50% chance after
May 16
Hard frost (28°F), first in fall, 50% chance before
September 27

The last 15 years (2006–2020 normals)

Typical last frost June 6 (4 days later than the 30-year normal), typical first fall frost September 18 (1 day later). Frost-free season 105 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: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 18, 20% June 14, 30% June 8, 40% June 5, 50% June 2, 60% May 30, 70% May 24, 80% May 19, 90% May 13. Observed last spring frost in recent years: 2021 May 27.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jul 1Jun 18Jun 2May 132021: May 27Fall at Beowawe: chance of a frost before this dateFall, chance of a frost before the date: 10% September 2, 20% September 7, 30% September 11, 40% September 14, 50% September 17, 60% September 19, 70% September 22, 80% September 26, 90% October 1. Observed first fall frost in recent years: 2021 September 20.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Sep 2Sep 17Oct 12021: September 20
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 27September 20
2022no datano data
2023no datano data
2024no datano data
2025no datano data
2026no dataseason not over yet

What these dates mean

Setting out tender crops on May 13 carries a 90% chance of a frost later than this date, making it a gamble for Beowawe gardeners. The cautious spring date for planting tender crops is June 18, when only a 10% chance of a later frost remains.

In fall the cautious date to finish harvesting tender crops is September 2, with only a 10% chance that a frost has already arrived; counting on crops as late as October 1 would involve a 90% chance of an earlier frost.

The 50% dates—June 2 in spring and September 17 in fall—mark the median point where a light frost is equally likely to occur before or after; they are not frost dates. Hard frost at 28 °F matters more than light frost at 32 °F because it can kill plant tissue that survives a light frost.

How to read the probabilities

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

  • Spring: "10% after June 18" 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 2" 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, NVNumbered nearest stations: 1 — Battle Mountain, NV — 22 mi; 2 — Elko, NV — 40 mi; 3 — Beowawe 49 S - University of N Ranch, NV — 48 mi; 4 — Ruby Lake NWR, NV — 58 mi; 5 — Winnemucca, NV — 73 mi.NV25 mi · 40 km1. Battle Mountain, NV — 22 mi12. Elko, NV — 40 mi23. Beowawe 49 S - University of N Ranch, NV — 48 mi34. Ruby Lake NWR, NV — 58 mi45. Winnemucca, NV — 73 mi5
  1. Battle Mountain, NV 22 mi (35 km)
  2. Elko, NV 40 mi (64 km)
  3. Beowawe 49 S - University of N Ranch, NV 48 mi (77 km)
  4. Ruby Lake NWR, NV 58 mi (94 km)
  5. Winnemucca, NV 73 mi (118 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: 40.5903, -116.475.