Frost dates by ZIP code: The nearest NOAA stations to your ZIP, 1991-2020 normals
Enter a five-digit ZIP code. PlainClimate finds its center (Census Bureau 2024) and the five nearest NOAA stations with frost dates, and shows each station's last spring and first autumn 32°F dates with its distance and elevation.
Frost dates near ZIP 97366
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 97366 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Newport (1 mi SE), OR, is 3 miles from the ZIP's center: its last spring frost comes after February 19 in half of years and after March 23 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Newport (1 mi SE), OR | 3 mi | 8 ft | February 19 | March 23 | December 16 | – |
| Newport, OR | 4 mi | 122 ft | March 21 | April 12 | November 27 | – |
| Newport (3 mi N), OR | 7 mi | 220 ft | March 12 | April 16 | December 10 | – |
| Yachats, OR | 18 mi | 50 ft | February 19 | March 23 | December 11 | – |
| Alsea, ORAlsea Fh (Fall Creek) | 19 mi | 230 ft | April 13 | May 3 | November 3 | – |
Frost comes later in spring at higher and colder stations and earlier in low, open ground: prefer a station at a similar elevation to yours. Hardiness zone in the table: the USDA's rule (the average of each year's coldest night, 1991-2020) applied to the station's own record.
Every frost threshold at Newport (1 mi SE)
NOAA publishes the dates for several temperatures and odds. A 30% spring date means a 3-in-10 chance of a later frost (the convention almanacs use); 50% is the median; 10% the cautious date.
| Threshold | Spring, 10% | Spring, 30% | Spring, 50% | Spring, 90% | Autumn, 50% | Autumn, 10% |
|---|---|---|---|---|---|---|
| 36°F (light frost) | April 30 | April 16 | April 5 | March 5 | November 21 | October 28 |
| 32°F | March 23 | February 28 | February 19 | December 28 | December 16 | November 14 |
| 28°F (hard freeze) | February 23 | February 9 | January 20 | December 9 | December 30 | December 1 |
| 24°F | February 17 | February 5 | January 2 | December 9 | December 31 | December 7 |
Source: NOAA NCEI 1991-2020 annual normals; ZIP centers: Census Bureau 2024 Gazetteer; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. Autumn 10%: one year in ten has its first frost before this date.