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 89501
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 89501 in zone 7b (the coldest night of a typical year: 5 to 10°F).
The nearest station, Reno Weather Office, NV, is 3 miles from the ZIP's center: its last spring frost comes after April 28 in half of years and after May 19 in one year in ten. By the USDA's method its plant hardiness zone is 7b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Reno Weather Office, NV | 3 mi | 4,987 ft | April 28 | May 19 | October 27 | 7b |
| Reno, NVReno Airport | 4 mi | 4,410 ft | April 20 | May 5 | October 23 | 7b |
| Sparks, NV | 5 mi | 4,357 ft | May 1 | May 25 | October 10 | 7b |
| Stead, NV | 8 mi | 5,101 ft | May 8 | June 2 | October 12 | – |
| Spanish Springs, NV | 9 mi | 4,489 ft | May 3 | May 24 | October 10 | – |
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 Reno Weather Office
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 25 | May 14 | April 25 | October 15 | September 28 |
| 32°F | May 19 | May 6 | April 28 | April 9 | October 27 | October 10 |
| 28°F (hard freeze) | May 2 | April 19 | April 10 | March 18 | November 8 | October 23 |
| 24°F | April 14 | March 31 | March 19 | February 19 | November 19 | November 1 |
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.