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 83209
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 83209 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Pocatello City, ID, is 2 miles from the ZIP's center: its last spring frost comes after May 2 in half of years and after May 18 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Pocatello City, ID | 2 mi | 4,460 ft | May 2 | May 18 | October 11 | – |
| Pocatello (2 mi NE), ID | 3 mi | 4,832 ft | May 16 | June 6 | October 2 | 6b |
| Pocatello, IDPocatello Regional Airport | 9 mi | 4,478 ft | May 23 | June 13 | September 18 | 6a |
| Fort Hall, ID1 mi NNE | 13 mi | 4,465 ft | May 20 | June 12 | September 20 | 5b |
| McCammon, ID | 18 mi | 4,770 ft | May 23 | June 10 | September 24 | 6a |
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 Pocatello City
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) | June 5 | May 24 | May 17 | May 1 | September 30 | September 12 |
| 32°F | May 18 | May 9 | May 2 | April 17 | October 11 | September 26 |
| 28°F (hard freeze) | May 4 | April 24 | April 17 | March 30 | October 24 | October 8 |
| 24°F | April 17 | April 6 | March 30 | March 9 | November 3 | October 19 |
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.