U.S. Frost Dates by Weather Station

NOAA station USC00426123 · Utah

Frost Dates for Neola, UT

NOAA weather station Neola (USC00426123), Utah · elevation 5950 ft (1814 m) · hardiness zone 6a*

  • Lower-risk planting dateafter June 7only 1 spring in 10 still has a frost later
  • Typical last frostMay 1950% chance of a frost after it
  • Typical first fall frostSeptember 2950% chance of a frost before it
  • Frost-free season130 daystypical year, 32°F
  • Hardiness zone6acalculated*

The year at a glance

Frost season at Neola, UTSpring: a frost after May 4 in 9 years out of 10, after May 19 in half of the years, after June 7 in 1 year out of 10. Fall: the first frost comes before September 17 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: 130 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 19First frost ~Sep 29Frost season at Neola, UTSpring: a frost after May 4 in 9 years out of 10, after May 19 in half of the years, after June 7 in 1 year out of 10. Fall: the first frost comes before September 17 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: 130 days.JFMAMJJASONDLast frost ~May 19First 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 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)June 7September 17
50% (typical)May 19September 29
90% (likely)May 4October 13
Frost-free season (32°F, 50% chance)
130 days
Hard frost (28°F), last in spring, 50% chance after
May 5
Hard frost (28°F), first in fall, 50% chance before
October 9

The last 15 years (2006–2020 normals)

Typical last frost May 15 (4 days earlier than the 30-year normal), typical first fall frost October 4 (5 days later). Frost-free season 138 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 Neola: chance of a frost after this dateSpring, chance of a frost after the date: 10% June 7, 20% June 2, 30% May 29, 40% May 23, 50% May 19, 60% May 16, 70% May 12, 80% May 8, 90% May 4. Observed last spring frost in recent years: 2021 May 12, 2022 May 22, 2023 May 6, 2024 May 24, 2025 May 15, 2026 May 19.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1Jun 7May 19May 42021: May 122022: May 222023: May 62024: May 242025: May 152026: May 19Fall at Neola: chance of a frost before this dateFall, chance of a frost before the date: 10% September 17, 20% September 21, 30% September 24, 40% September 27, 50% September 29, 60% October 1, 70% October 4, 80% October 7, 90% October 13. Observed first fall frost in recent years: 2021 October 12, 2022 October 16, 2023 October 14, 2024 October 25, 2025 October 17.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Sep 17Sep 29Oct 132021: October 122022: October 162023: October 142024: October 252025: October 17
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 12October 12
2022May 22October 16
2023May 6October 14
2024May 24October 25
2025May 15October 17
2026May 19season not over yet

What these dates mean

June 7 is the cautious spring light-frost date for Neola, meaning only a 10 % chance that a frost will occur later; this gives a gardener enough confidence to set out tender crops after that day.

The median light-frost date, May 19, represents an even-odds point, so a gardener should expect roughly equal chances of a frost occurring before or after it. In the fall the cautious date is September 17, with only a 10 % chance that a frost has already arrived, allowing the final harvest of tender crops before frost risk rises. The median fall light-frost date, September 29, similarly marks the fifty-fifty point. Hard-frost dates at 28 °F are May 5 in spring and October 9 in fall; a hard frost can damage plants that survive a light frost, making it a more serious threat.

How to read the probabilities

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

  • Spring: "10% after June 7" 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 17" 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 Neola, UTNumbered nearest stations: 1 — near Roosevelt, UT — 10 mi; 2 — Duchesne, UT — 25 mi; 3 — Ouray, UT — 29 mi; 4 — Jensen, UT — 37 mi; 5 — Flaming Gorge, UT — 49 mi.UTCOWY25 mi · 40 km1. near Roosevelt, UT — 10 mi12. Duchesne, UT — 25 mi23. Ouray, UT — 29 mi34. Jensen, UT — 37 mi45. Flaming Gorge, UT — 49 mi5
  1. near Roosevelt, UT 10 mi (16 km)
  2. Duchesne, UT 25 mi (40 km)
  3. Ouray, UT 29 mi (47 km)
  4. Jensen, UT 37 mi (60 km)
  5. Flaming Gorge, UT 49 mi (79 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: 40.4178, -110.0511.