U.S. Frost Dates by Weather Station

NOAA station USC00421918 · Utah

Frost Dates near Garland, UT

NOAA weather station Cutler Dam (USC00421918), Utah · elevation 4290 ft (1308 m) · hardiness zone 6a*

Garland is the nearest town to the station (8.3 mi away) in GeoNames (CC BY 4.0). The dates below are measured at the station, not in the town itself.

  • Lower-risk planting dateafter May 24only 1 spring in 10 still has a frost later
  • Typical last frostMay 350% chance of a frost after it
  • Typical first fall frostOctober 1250% chance of a frost before it
  • Frost-free season160 daystypical year, 32°F
  • Hardiness zone6acalculated*

The year at a glance

Frost season near Garland, UTSpring: a frost after April 17 in 9 years out of 10, after May 3 in half of the years, after May 24 in 1 year out of 10. Fall: the first frost comes before September 27 in 1 year out of 10, before October 12 in half of the years, before October 26 in 9 years out of 10. Typical frost-free season: 160 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~May 3First frost ~Oct 12Frost season near Garland, UTSpring: a frost after April 17 in 9 years out of 10, after May 3 in half of the years, after May 24 in 1 year out of 10. Fall: the first frost comes before September 27 in 1 year out of 10, before October 12 in half of the years, before October 26 in 9 years out of 10. Typical frost-free season: 160 days.JFMAMJJASONDLast frost ~May 3First frost ~Oct 12
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)May 24September 27
50% (typical)May 3October 12
90% (likely)April 17October 26
Frost-free season (32°F, 50% chance)
160 days
Hard frost (28°F), last in spring, 50% chance after
April 19
Hard frost (28°F), first in fall, 50% chance before
October 24

The last 15 years (2006–2020 normals)

Typical last frost May 2 (1 day earlier than the 30-year normal), typical first fall frost October 16 (4 days later). Frost-free season 166 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 near Garland: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 24, 20% May 17, 30% May 11, 40% May 6, 50% May 3, 60% April 30, 70% April 27, 80% April 22, 90% April 17. Observed last spring frost in recent years: 2021 April 21, 2022 May 20, 2024 May 9, 2025 April 20, 2026 April 28.Spring: last frostChance of a frost after this date10%50%90%May 1Jun 1May 24May 3Apr 172021: April 212022: May 202024: May 92025: April 202026: April 28Fall near Garland: chance of a frost before this dateFall, chance of a frost before the date: 10% September 27, 20% October 1, 30% October 5, 40% October 8, 50% October 12, 60% October 15, 70% October 18, 80% October 22, 90% October 26. Observed first fall frost in recent years: 2021 October 13, 2022 October 21, 2023 October 27, 2024 October 30, 2025 October 28.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Sep 27Oct 12Oct 262021: October 132022: October 212023: October 272024: October 302025: October 28
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
2021April 21October 13
2022May 20October 21
2023incomplete recordOctober 27
2024May 9October 30
2025April 20October 28
2026April 28season not over yet

What these dates mean

The 160 days between the 50% dates in the Garland area, May 3 and October 12, define the period when light frosts are equally likely to have occurred or not. During this window gardeners can plan most activities that are not threatened by a 32 °F frost, while outside it the risk rises sharply.

For a cautious spring schedule the 10 % chance date, May 24, is used to set out tender crops, whereas planting on April 17 carries a 90 % chance of a later frost and is a gamble. In the fall the cautious date is September 27, when there is only a 10 % chance that a light frost has arrived; targeting October 26 would be a gamble because a frost is likely 90 % of the time.

A hard frost at 28 °F can harm plants that survive a light frost, so the median hard-frost dates, April 19 and October 24, mark stricter limits for sensitive crops.

How to read the probabilities

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

  • Spring: "10% after May 24" 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 27" 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 Garland, UTNumbered nearest stations: 1 — Logan Radio Kvnu, UT — 12 mi; 2 — Richmond, UT — 14 mi; 3 — near Logan, UT — 14 mi; 4 — Preston, ID — 20 mi; 5 — Brigham City, UT — 21 mi.UTIDWY25 mi · 40 km1. Logan Radio Kvnu, UT — 12 mi12. Richmond, UT — 14 mi23. near Logan, UT — 14 mi34. Preston, ID — 20 mi45. Brigham City, UT — 21 mi5
  1. Logan Radio Kvnu, UT 12 mi (20 km)
  2. Richmond, UT 14 mi (22 km)
  3. near Logan, UT 14 mi (23 km)
  4. Preston, ID 20 mi (32 km)
  5. Brigham City, UT 21 mi (34 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: 41.8331, -112.0578.