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 83201
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 83201 in zone 6b (the coldest night of a typical year: -5 to 0°F).
The nearest station, Pocatello (2 mi NE), ID, is 2 miles from the ZIP's center: its last spring frost comes after May 16 in half of years and after June 6 in one year in ten. By the USDA's method its plant hardiness zone is 6b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Pocatello (2 mi NE), ID | 2 mi | 4,832 ft | May 16 | June 6 | October 2 | 6b |
| Pocatello City, ID | 4 mi | 4,460 ft | May 2 | May 18 | October 11 | – |
| Fort Hall, ID1 mi NNE | 10 mi | 4,465 ft | May 20 | June 12 | September 20 | 5b |
| Pocatello, IDPocatello Regional Airport | 10 mi | 4,478 ft | May 23 | June 13 | September 18 | 6a |
| McCammon, ID | 20 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 (2 mi NE)
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 18 | June 10 | June 5 | May 17 | September 21 | September 5 |
| 32°F | June 6 | May 25 | May 16 | April 30 | October 2 | September 14 |
| 28°F (hard freeze) | May 18 | May 7 | May 1 | April 16 | October 13 | September 26 |
| 24°F | May 5 | April 24 | April 17 | March 25 | October 25 | October 6 |
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.