U.S. Frost Dates by Weather Station

NOAA station USC00358095 · Oregon

Frost Dates for Stayton, OR

NOAA weather station Stayton (USC00358095), Oregon · elevation 425 ft (130 m) · hardiness zone 8b*

  • Lower-risk planting dateafter April 18only 1 spring in 10 still has a frost later
  • Typical last frostMarch 2950% chance of a frost after it
  • Typical first fall frostNovember 650% chance of a frost before it
  • Frost-free season222 daystypical year, 32°F
  • Hardiness zone8bcalculated*

The year at a glance

Frost season at Stayton, ORSpring: a frost after March 5 in 9 years out of 10, after March 29 in half of the years, after April 18 in 1 year out of 10. Fall: the first frost comes before October 20 in 1 year out of 10, before November 6 in half of the years, before November 26 in 9 years out of 10. Typical frost-free season: 222 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 29First frost ~Nov 6Frost season at Stayton, ORSpring: a frost after March 5 in 9 years out of 10, after March 29 in half of the years, after April 18 in 1 year out of 10. Fall: the first frost comes before October 20 in 1 year out of 10, before November 6 in half of the years, before November 26 in 9 years out of 10. Typical frost-free season: 222 days.JFMAMJJASONDLast frost ~Mar 29First frost ~Nov 6
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)April 18October 20
50% (typical)March 29November 6
90% (likely)March 5November 26
Frost-free season (32°F, 50% chance)
222 days
Hard frost (28°F), last in spring, 50% chance after
March 1
Hard frost (28°F), first in fall, 50% chance before
November 22

The last 15 years (2006–2020 normals)

Typical last frost March 31 (2 days later than the 30-year normal), typical first fall frost November 8 (2 days later). Frost-free season 219 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 Stayton: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 18, 20% April 9, 30% April 4, 40% March 31, 50% March 29, 60% March 25, 70% March 20, 80% March 14, 90% March 5. Observed last spring frost in recent years: 2021 April 13, 2022 April 16, 2023 March 30, 2024 April 5, 2025 March 6, 2026 March 27.Spring: last frostChance of a frost after this date10%50%90%Mar 1Apr 1May 1Apr 18Mar 29Mar 52021: April 132022: April 162023: March 302024: April 52025: March 62026: March 27Fall at Stayton: chance of a frost before this dateFall, chance of a frost before the date: 10% October 20, 20% October 26, 30% October 30, 40% November 2, 50% November 6, 60% November 10, 70% November 14, 80% November 20, 90% November 26. Observed first fall frost in recent years: 2021 November 17, 2022 November 7, 2023 October 27, 2024 October 25, 2025 November 17.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Oct 20Nov 6Nov 262021: November 172022: November 72023: October 272024: October 252025: November 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
2021April 13November 17
2022April 16November 7
2023March 30October 27
2024April 5October 25
2025March 6November 17
2026March 27season not over yet

What these dates mean

The 222 days between the 50% dates in Stayton frame the period when light frosts are equally likely to have occurred or not. The 50% light-frost date in spring is March 29, and the 50% light-frost date in fall is November 6; each marks an even-odds point for a 32 °F frost based on the 25-year record.

In spring, the cautious date for setting out tender crops is April 18, which carries a 10 % chance of a frost later than that day; planting on March 5 would be a gamble with a 90 % chance of frost later. In fall, the cautious date to finish harvesting tender crops is October 20, with only a 10 % chance that a frost has arrived earlier, while November 26 would be a gamble with a 90 % chance of frost earlier. A hard frost at 28 °F, represented by the 50% dates March 1 and November 22, can injure plants that survive a light frost, so it is a more critical threat.

How to read the probabilities

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

  • Spring: "10% after April 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 October 20" 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 Stayton, ORNumbered nearest stations: 1 — Lacomb, OR — 12 mi; 2 — Silverton, OR — 15 mi; 3 — near Corvallis, OR — 21 mi; 4 — Dallas, OR — 26 mi; 5 — near Sweet Home, OR — 27 mi.25 mi · 40 km1. Lacomb, OR — 12 mi12. Silverton, OR — 15 mi23. near Corvallis, OR — 21 mi34. Dallas, OR — 26 mi45. near Sweet Home, OR — 27 mi5
  1. Lacomb, OR 12 mi (20 km)
  2. Silverton, OR 15 mi (24 km)
  3. near Corvallis, OR 21 mi (34 km)
  4. Dallas, OR 26 mi (41 km)
  5. near Sweet Home, OR 27 mi (43 km)

Sources

* Hardiness zone 8b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 44.7894, -122.815.