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 98682
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 98682 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Battle Ground, WA, is 7 miles from the ZIP's center: its last spring frost comes after April 26 in half of years and after May 12 in one year in ten. By the USDA's method its plant hardiness zone is 8b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Battle Ground, WA | 7 mi | 284 ft | April 26 | May 12 | October 16 | 8b |
| Portland, ORPortland International Airport | 8 mi | 19 ft | March 13 | April 1 | November 19 | 9a |
| Hazel Dell, WAVancouver (4 mi NNE) | 8 mi | 210 ft | April 26 | May 10 | October 18 | 8b |
| Portland Weather Office, OR | 8 mi | 21 ft | March 13 | April 5 | November 22 | – |
| Vancouver, WAVancouver Pearson Airport | 9 mi | 30 ft | March 29 | April 18 | November 9 | 8b |
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 Battle Ground
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) | May 31 | May 21 | May 13 | April 29 | September 30 | September 11 |
| 32°F | May 12 | May 1 | April 26 | April 5 | October 16 | September 29 |
| 28°F (hard freeze) | April 23 | April 8 | March 29 | March 4 | November 5 | October 16 |
| 24°F | March 24 | March 6 | February 26 | January 21 | November 24 | October 28 |
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.