U.S. Frost Dates by Weather Station

NOAA station USC00265818 · Nevada

Frost Dates for Orovada, NV

NOAA weather station Orovada 3 W (USC00265818), Nevada · elevation 4200 ft (1280 m) · hardiness zone 6a*

  • Lower-risk planting dateafter June 20only 1 spring in 10 still has a frost later
  • Typical last frostJune 250% chance of a frost after it
  • Typical first fall frostSeptember 1150% chance of a frost before it
  • Frost-free season102 daystypical year, 32°F
  • Hardiness zone6acalculated*

The year at a glance

Frost season at Orovada, NVSpring: a frost after May 12 in 9 years out of 10, after June 2 in half of the years, after June 20 in 1 year out of 10. Fall: the first frost comes before August 28 in 1 year out of 10, before September 11 in half of the years, before September 26 in 9 years out of 10. Typical frost-free season: 102 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Jun 2First frost ~Sep 11Frost season at Orovada, NVSpring: a frost after May 12 in 9 years out of 10, after June 2 in half of the years, after June 20 in 1 year out of 10. Fall: the first frost comes before August 28 in 1 year out of 10, before September 11 in half of the years, before September 26 in 9 years out of 10. Typical frost-free season: 102 days.JFMAMJJASONDLast frost ~Jun 2First frost ~Sep 11
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)June 20August 28
50% (typical)June 2September 11
90% (likely)May 12September 26
Frost-free season (32°F, 50% chance)
102 days
Hard frost (28°F), last in spring, 50% chance after
May 13
Hard frost (28°F), first in fall, 50% chance before
September 25

The last 15 years (2006–2020 normals)

Typical last frost June 5 (3 days later than the 30-year normal), typical first fall frost September 15 (4 days later). Frost-free season 102 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 Orovada: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 20, 20% June 14, 30% June 9, 40% June 5, 50% June 2, 60% May 30, 70% May 24, 80% May 19, 90% May 12. Observed last spring frost in recent years: 2021 May 26, 2022 June 15, 2023 June 20, 2024 June 19, 2025 May 20, 2026 May 23.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jul 1Jun 20Jun 2May 122021: May 262022: June 152023: June 202024: June 192025: May 202026: May 23Fall at Orovada: chance of a frost before this dateFall, chance of a frost before the date: 10% August 28, 20% September 2, 30% September 6, 40% September 9, 50% September 11, 60% September 14, 70% September 18, 80% September 21, 90% September 26. Observed first fall frost in recent years: 2022 September 23, 2023 September 23, 2024 August 26, 2025 October 6.Fall: first frostChance of a frost before this date10%50%90%Sep 1Oct 1Aug 28Sep 11Sep 262022: September 232023: September 232024: August 262025: 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
2021May 26incomplete record
2022June 15September 23
2023June 20September 23
2024June 19August 26
2025May 20October 6
2026May 23season not over yet

What these dates mean

The 102 days between the 50% dates in Orovada – June 2 and September 11 – enclose the period when tender crops have an even chance of encountering a light frost, so planting and harvesting are usually timed within this window. The record spans 29 years, giving confidence in the reliability of the probabilities.

For a cautious spring schedule, the 10% chance date of June 20 is used; planting before the 90% chance date of May 12 carries a high risk. In the fall, the cautious date to finish tender crops is August 28, while waiting until the 90% chance date of September 26 would be a gamble.

Hard frost at 28°F (May 13 and September 25 as the 50% dates) can injure plants that survive a 32°F light frost, making it a more serious concern.

How to read the probabilities

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

  • Spring: "10% after June 20" 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 August 28" 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 Orovada, NVNumbered nearest stations: 1 — Winnemucca, NV — 46 mi; 2 — Imlay, NV — 65 mi; 3 — Battle Mountain, NV — 82 mi; 4 — Rome, OR — 90 mi; 5 — Beowawe, NV — 98 mi.NVORID50 mi · 80 km1. Winnemucca, NV — 46 mi12. Imlay, NV — 65 mi23. Battle Mountain, NV — 82 mi34. Rome, OR — 90 mi45. Beowawe, NV — 98 mi5
  1. Winnemucca, NV 46 mi (74 km)
  2. Imlay, NV 65 mi (105 km)
  3. Battle Mountain, NV 82 mi (133 km)
  4. Rome, OR 90 mi (144 km)
  5. Beowawe, NV 98 mi (158 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: 41.5683, -117.8389.