U.S. Frost Dates by Weather Station

NOAA station USC00262708 · Nevada

Frost Dates for Eureka, NV

NOAA weather station Eureka (USC00262708), Nevada · elevation 6430 ft (1960 m) · hardiness zone 6b*

  • Lower-risk planting dateafter June 19only 1 spring in 10 still has a frost later
  • Typical last frostJune 250% chance of a frost after it
  • Typical first fall frostSeptember 2950% chance of a frost before it
  • Frost-free season119 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Eureka, NVSpring: a frost after May 13 in 9 years out of 10, after June 2 in half of the years, after June 19 in 1 year out of 10. Fall: the first frost comes before September 16 in 1 year out of 10, before September 29 in half of the years, before October 13 in 9 years out of 10. Typical frost-free season: 119 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Jun 2First frost ~Sep 29Frost season at Eureka, NVSpring: a frost after May 13 in 9 years out of 10, after June 2 in half of the years, after June 19 in 1 year out of 10. Fall: the first frost comes before September 16 in 1 year out of 10, before September 29 in half of the years, before October 13 in 9 years out of 10. Typical frost-free season: 119 days.JFMAMJJASONDLast frost ~Jun 2First 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 25 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)June 19September 16
50% (typical)June 2September 29
90% (likely)May 13October 13
Frost-free season (32°F, 50% chance)
119 days
Hard frost (28°F), last in spring, 50% chance after
May 15
Hard frost (28°F), first in fall, 50% chance before
October 10

The last 15 years (2006–2020 normals)

Typical last frost June 4 (2 days later than the 30-year normal), typical first fall frost September 30 (1 day later). Frost-free season 118 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 Eureka: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 19, 20% June 13, 30% June 8, 40% June 5, 50% June 2, 60% May 30, 70% May 25, 80% May 20, 90% May 13. Observed last spring frost in recent years: 2021 May 25, 2022 June 14, 2023 May 13, 2024 June 19, 2025 June 22, 2026 May 20.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jul 1Jun 19Jun 2May 132021: May 252022: June 142023: May 132024: June 192025: June 222026: May 20Fall at Eureka: chance of a frost before this dateFall, chance of a frost before the date: 10% September 16, 20% September 21, 30% September 25, 40% September 27, 50% September 29, 60% October 1, 70% October 4, 80% October 8, 90% October 13. Observed first fall frost in recent years: 2021 September 29, 2022 October 23, 2023 September 22, 2024 October 18, 2025 October 5.Fall: first frostChance of a frost before this date10%50%90%Oct 1Sep 16Sep 29Oct 132021: September 292022: October 232023: September 222024: October 182025: 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
2021May 25September 29
2022June 14October 23
2023May 13September 22
2024June 19October 18
2025June 22October 5
2026May 20season not over yet

What these dates mean

Setting out tender crops on May 13 in Eureka is a gamble, because a light frost later than that date occurs 90 % of the time. Waiting until the cautious spring date of June 19 reduces that risk to a 10 % chance of a frost later.

The 50 % hard-frost date is May 15, which carries a 50 % chance of a hard frost later than this date in spring, and the 50 % hard-frost date is October 10, with a 50 % chance of a hard frost earlier than this date in fall. For light frost, the cautious spring date for tender crops is June 19 and the cautious fall date to finish harvesting them is September 16, each linked to a 10 % chance of a frost earlier (fall) or later (spring).

Hard frost at 28 °F can damage plants that survive a light frost at 32 °F, making the hard-frost threshold the more critical consideration for gardeners in this location.

How to read the probabilities

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

  • Spring: "10% after June 19" 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 16" 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 Eureka, NVNumbered nearest stations: 1 — Beowawe 49 S - University of N Ranch, NV — 43 mi; 2 — Ruby Lake NWR, NV — 53 mi; 3 — near Ely, NV — 61 mi; 4 — McGill, NV — 64 mi; 5 — Blue Eagle Ranch - Currant 12 SSW, NV — 72 mi.UT50 mi · 80 km1. Beowawe 49 S - University of N Ranch, NV — 43 mi12. Ruby Lake NWR, NV — 53 mi23. near Ely, NV — 61 mi34. McGill, NV — 64 mi45. Blue Eagle Ranch - Currant 12 SSW, NV — 72 mi5
  1. Beowawe 49 S - University of N Ranch, NV 43 mi (68 km)
  2. Ruby Lake NWR, NV 53 mi (86 km)
  3. near Ely, NV 61 mi (99 km)
  4. McGill, NV 64 mi (103 km)
  5. Blue Eagle Ranch - Currant 12 SSW, NV 72 mi (116 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: 39.5169, -115.9622.