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 89439
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 89439 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Verdi, CA, is 2 miles from the ZIP's center: its last spring frost comes after May 9 in half of years and after June 2 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Verdi, CA2 mi W | 2 mi | 5,429 ft | May 9 | June 2 | October 17 | – |
| Stead, NV | 9 mi | 5,101 ft | May 8 | June 2 | October 12 | – |
| Reno Weather Office, NV | 11 mi | 4,987 ft | April 28 | May 19 | October 27 | 7b |
| Reno, NVReno Airport | 12 mi | 4,410 ft | April 20 | May 5 | October 23 | 7b |
| Sparks, NV | 14 mi | 4,357 ft | May 1 | May 25 | October 10 | 7b |
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 Verdi
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 16 | June 5 | May 31 | May 11 | October 5 | September 16 |
| 32°F | June 2 | May 19 | May 9 | April 23 | October 17 | October 1 |
| 28°F (hard freeze) | May 16 | May 1 | April 24 | April 7 | October 31 | October 13 |
| 24°F | April 25 | April 14 | April 6 | March 10 | November 11 | October 26 |
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.