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 89121
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 89121 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Las Vegas, NV, is 5 miles from the ZIP's center: its last spring frost comes after January 20 in half of years and after February 14 in one year in ten. By the USDA's method its plant hardiness zone is 9b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Las Vegas, NVHarry Reid International Airport | 5 mi | 2,131 ft | January 20 | February 14 | December 15 | 9b |
| Enterprise, NVLas Vegas Weather Office | 7 mi | 2,275 ft | February 4 | February 27 | December 5 | 9a |
| North Las Vegas, NV | 8 mi | 1,898 ft | February 1 | February 24 | December 8 | – |
| Las Vegas Air Terminal, NV | 9 mi | 2,203 ft | January 24 | February 19 | December 10 | 9b |
| Alan Bible Visitor Center, NV | 18 mi | 1,641 ft | January 21 | March 5 | December 17 | – |
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 Las Vegas
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) | March 4 | February 21 | February 11 | January 19 | December 3 | November 18 |
| 32°F | February 14 | February 1 | January 20 | December 20 | December 15 | November 28 |
| 28°F (hard freeze) | January 29 | January 9 | December 31 | December 10 | December 26 | December 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.